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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementEquityComponentsAxis_lbl" xml:lang="en-US">Equity Components [Axis]</label>
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    <loc xlink:type="locator" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl" xml:lang="en-US">Fair Value Hierarchy and NAV [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:to="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfFairValueMeasurementsForBothThePublicAndPrivatePlacementAbstract" xlink:href="nn-20210930.xsd#nn_ScheduleOfFairValueMeasurementsForBothThePublicAndPrivatePlacementAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_ScheduleOfFairValueMeasurementsForBothThePublicAndPrivatePlacementAbstract_lbl" xml:lang="en-US">Schedule of fair value measurements for both the Public and Private Placement [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfFairValueMeasurementsForBothThePublicAndPrivatePlacementAbstract" xlink:to="nn_ScheduleOfFairValueMeasurementsForBothThePublicAndPrivatePlacementAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="srt_RangeAxis" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="srt_RangeAxis_lbl" xml:lang="en-US">Statistical Measurement [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_RangeAxis" xlink:to="srt_RangeAxis_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_SubsidiarySaleOfStockAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsidiarySaleOfStockAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsidiarySaleOfStockAxis_lbl" xml:lang="en-US">Sale of Stock [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsidiarySaleOfStockAxis" xlink:to="us-gaap_SubsidiarySaleOfStockAxis_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfChangesInFairValueOfWarrantLiabilitiesAbstract" xlink:href="nn-20210930.xsd#nn_ScheduleOfChangesInFairValueOfWarrantLiabilitiesAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_ScheduleOfChangesInFairValueOfWarrantLiabilitiesAbstract_lbl" xml:lang="en-US">Schedule of changes in fair value of warrant liabilities [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfChangesInFairValueOfWarrantLiabilitiesAbstract" xlink:to="nn_ScheduleOfChangesInFairValueOfWarrantLiabilitiesAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_lbl" xml:lang="en-US">Fair value as of Warrant liability, begining</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue" xlink:to="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs_lbl" xml:lang="en-US">Fair value as of Warrant liability, ending</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs" xlink:to="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfWeightedAverageNumberOfNonRedeemableAbstract" xlink:href="nn-20210930.xsd#nn_ScheduleOfWeightedAverageNumberOfNonRedeemableAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_ScheduleOfWeightedAverageNumberOfNonRedeemableAbstract_lbl" xml:lang="en-US">Schedule of weighted average number of non-redeemable [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfWeightedAverageNumberOfNonRedeemableAbstract" xlink:to="nn_ScheduleOfWeightedAverageNumberOfNonRedeemableAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_PrivatePlacementAbstract" xlink:href="nn-20210930.xsd#nn_PrivatePlacementAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_PrivatePlacementAbstract_lbl" xml:lang="en-US">Private Placement [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PrivatePlacementAbstract" xlink:to="nn_PrivatePlacementAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_RelatedPartyTransactionsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RelatedPartyTransactionsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RelatedPartyTransactionsAbstract_lbl" xml:lang="en-US">Related Party Transactions [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionsAbstract" xlink:to="us-gaap_RelatedPartyTransactionsAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_DisclosureTextBlockSupplementAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisclosureTextBlockSupplementAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DisclosureTextBlockSupplementAbstract_lbl" xml:lang="en-US">Disclosure Text Block Supplement [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DisclosureTextBlockSupplementAbstract" xlink:to="us-gaap_DisclosureTextBlockSupplementAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfFairValueHeldToMaturitiesAbstract" xlink:href="nn-20210930.xsd#nn_ScheduleOfFairValueHeldToMaturitiesAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_ScheduleOfFairValueHeldToMaturitiesAbstract_lbl" xml:lang="en-US">Schedule of fair value held to maturities [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfFairValueHeldToMaturitiesAbstract" xlink:to="nn_ScheduleOfFairValueHeldToMaturitiesAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_CashAndCashEquivalentsAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashAndCashEquivalentsAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashAndCashEquivalentsAxis_lbl" xml:lang="en-US">Cash and Cash Equivalents [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsAxis" xlink:to="us-gaap_CashAndCashEquivalentsAxis_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract_lbl" xml:lang="en-US">Commitments and Contingencies Disclosure [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:to="us-gaap_CommitmentsAndContingenciesDisclosureAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_StockholdersEquityNoteAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquityNoteAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockholdersEquityNoteAbstract_lbl" xml:lang="en-US">Stockholders&apos; Equity Note [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityNoteAbstract" xlink:to="us-gaap_StockholdersEquityNoteAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="srt_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="srt_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract_lbl" xml:lang="en-US">Condensed Financial Information Disclosure [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract" xlink:to="srt_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfCompanySPreviouslyReportedFinancialStatementsAbstract" xlink:href="nn-20210930.xsd#nn_ScheduleOfCompanySPreviouslyReportedFinancialStatementsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_ScheduleOfCompanySPreviouslyReportedFinancialStatementsAbstract_lbl" xml:lang="en-US">Schedule of company&#8217;s previously reported financial statements [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfCompanySPreviouslyReportedFinancialStatementsAbstract" xlink:to="nn_ScheduleOfCompanySPreviouslyReportedFinancialStatementsAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_FairValueNetAssetLiability" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueNetAssetLiability"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_FairValueNetAssetLiability_lbl" xml:lang="en-US">Fair value as of August 20, 2020</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueNetAssetLiability" xlink:to="us-gaap_FairValueNetAssetLiability_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_FairValueNetAssetLiability_lbl0" xml:lang="en-US">Fair value as of December 31, 2020</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueNetAssetLiability" xlink:to="us-gaap_FairValueNetAssetLiability_lbl0"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfFairValueOfHeldToMaturitySecuritiesAbstract" xlink:href="nn-20210930.xsd#nn_ScheduleOfFairValueOfHeldToMaturitySecuritiesAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_ScheduleOfFairValueOfHeldToMaturitySecuritiesAbstract_lbl" xml:lang="en-US">Schedule of fair value of held to maturity securities [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfFairValueOfHeldToMaturitySecuritiesAbstract" xlink:to="nn_ScheduleOfFairValueOfHeldToMaturitySecuritiesAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_IncomeTaxDisclosureAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeTaxDisclosureAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeTaxDisclosureAbstract_lbl" xml:lang="en-US">Income Tax Disclosure [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxDisclosureAbstract" xlink:to="us-gaap_IncomeTaxDisclosureAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfNetDeferredTaxAssetsAbstract" xlink:href="nn-20210930.xsd#nn_ScheduleOfNetDeferredTaxAssetsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_ScheduleOfNetDeferredTaxAssetsAbstract_lbl" xml:lang="en-US">Schedule of net deferred tax assets [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfNetDeferredTaxAssetsAbstract" xlink:to="nn_ScheduleOfNetDeferredTaxAssetsAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_DeferredTaxAssetsGross" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredTaxAssetsGross"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_DeferredTaxAssetsGross_lbl" xml:lang="en-US">Total deferred tax asset</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsGross" xlink:to="us-gaap_DeferredTaxAssetsGross_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfIncomeTaxProvisionAbstract" xlink:href="nn-20210930.xsd#nn_ScheduleOfIncomeTaxProvisionAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_ScheduleOfIncomeTaxProvisionAbstract_lbl" xml:lang="en-US">Schedule of income tax provision [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfIncomeTaxProvisionAbstract" xlink:to="nn_ScheduleOfIncomeTaxProvisionAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfAReconciliationOfTheFederalIncomeTaxRateAbstract" xlink:href="nn-20210930.xsd#nn_ScheduleOfAReconciliationOfTheFederalIncomeTaxRateAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_ScheduleOfAReconciliationOfTheFederalIncomeTaxRateAbstract_lbl" xml:lang="en-US">Schedule of a reconciliation of the federal income tax rate [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfAReconciliationOfTheFederalIncomeTaxRateAbstract" xlink:to="nn_ScheduleOfAReconciliationOfTheFederalIncomeTaxRateAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfTheDilutedWeightedAverageSharesAbstract" xlink:href="nn-20210930.xsd#nn_ScheduleOfTheDilutedWeightedAverageSharesAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_ScheduleOfTheDilutedWeightedAverageSharesAbstract_lbl" xml:lang="en-US">Schedule of the diluted weighted average shares [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfTheDilutedWeightedAverageSharesAbstract" xlink:to="nn_ScheduleOfTheDilutedWeightedAverageSharesAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfAntiDilutiveUnvestedRestrictedUnitsAsWellAsTheAntiDilutiveEffectsAbstract" xlink:href="nn-20210930.xsd#nn_ScheduleOfAntiDilutiveUnvestedRestrictedUnitsAsWellAsTheAntiDilutiveEffectsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_ScheduleOfAntiDilutiveUnvestedRestrictedUnitsAsWellAsTheAntiDilutiveEffectsAbstract_lbl" xml:lang="en-US">Schedule of anti-dilutive unvested restricted units, as well as the anti-dilutive effects [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfAntiDilutiveUnvestedRestrictedUnitsAsWellAsTheAntiDilutiveEffectsAbstract" xlink:to="nn_ScheduleOfAntiDilutiveUnvestedRestrictedUnitsAsWellAsTheAntiDilutiveEffectsAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_DebtDisclosureAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtDisclosureAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtDisclosureAbstract_lbl" xml:lang="en-US">Debt Disclosure [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtDisclosureAbstract" xlink:to="us-gaap_DebtDisclosureAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfDebtConsistsAbstract" xlink:href="nn-20210930.xsd#nn_ScheduleOfDebtConsistsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_ScheduleOfDebtConsistsAbstract_lbl" xml:lang="en-US">Schedule of debt consists [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfDebtConsistsAbstract" xlink:to="nn_ScheduleOfDebtConsistsAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_WarrantsAndWarrantLiabilityAbstract" xlink:href="nn-20210930.xsd#nn_WarrantsAndWarrantLiabilityAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_WarrantsAndWarrantLiabilityAbstract_lbl" xml:lang="en-US">Warrants And Warrant Liability [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WarrantsAndWarrantLiabilityAbstract" xlink:to="nn_WarrantsAndWarrantLiabilityAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_FairValueDisclosuresAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueDisclosuresAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueDisclosuresAbstract_lbl" xml:lang="en-US">Fair Value Disclosures [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueDisclosuresAbstract" xlink:to="us-gaap_FairValueDisclosuresAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueAbstract" xlink:href="nn-20210930.xsd#nn_ScheduleOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_ScheduleOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueAbstract_lbl" xml:lang="en-US">Schedule of financial assets and liabilities measured at fair value [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueAbstract" xlink:to="nn_ScheduleOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="srt_StatementGeographicalAxis" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_StatementGeographicalAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="srt_StatementGeographicalAxis_lbl" xml:lang="en-US">Geographical [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_StatementGeographicalAxis" xlink:to="srt_StatementGeographicalAxis_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfFairValueWarrantsEstimatedUsingTheBlackScholesOptionPricingModelAbstract" xlink:href="nn-20210930.xsd#nn_ScheduleOfFairValueWarrantsEstimatedUsingTheBlackScholesOptionPricingModelAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_ScheduleOfFairValueWarrantsEstimatedUsingTheBlackScholesOptionPricingModelAbstract_lbl" xml:lang="en-US">Schedule of fair value warrants estimated using the Black-Scholes option-pricing model [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfFairValueWarrantsEstimatedUsingTheBlackScholesOptionPricingModelAbstract" xlink:to="nn_ScheduleOfFairValueWarrantsEstimatedUsingTheBlackScholesOptionPricingModelAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfBeginningAndEndingBalancesForTheLiabilitiesMeasuredAtFairValueAbstract" xlink:href="nn-20210930.xsd#nn_ScheduleOfBeginningAndEndingBalancesForTheLiabilitiesMeasuredAtFairValueAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_ScheduleOfBeginningAndEndingBalancesForTheLiabilitiesMeasuredAtFairValueAbstract_lbl" xml:lang="en-US">Schedule of beginning and ending balances for the liabilities measured at fair value [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfBeginningAndEndingBalancesForTheLiabilitiesMeasuredAtFairValueAbstract" xlink:to="nn_ScheduleOfBeginningAndEndingBalancesForTheLiabilitiesMeasuredAtFairValueAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_lbl" xml:lang="en-US">Balance</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue" xlink:to="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_lbl0" xml:lang="en-US">Balance</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue" xlink:to="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_lbl0"/>
    <loc xlink:type="locator" xlink:label="nn_CommonUnitsAndConvertiblePreferredUnitsAbstract" xlink:href="nn-20210930.xsd#nn_CommonUnitsAndConvertiblePreferredUnitsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_CommonUnitsAndConvertiblePreferredUnitsAbstract_lbl" xml:lang="en-US">Common Units And Convertible Preferred Units [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonUnitsAndConvertiblePreferredUnitsAbstract" xlink:to="nn_CommonUnitsAndConvertiblePreferredUnitsAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfOtherCurrentAssetsAbstract" xlink:href="nn-20210930.xsd#nn_ScheduleOfOtherCurrentAssetsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_ScheduleOfOtherCurrentAssetsAbstract_lbl" xml:lang="en-US">Schedule of other current assets [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfOtherCurrentAssetsAbstract" xlink:to="nn_ScheduleOfOtherCurrentAssetsAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_OtherAssetsCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherAssetsCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_OtherAssetsCurrent_lbl" xml:lang="en-US">Total</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAssetsCurrent" xlink:to="us-gaap_OtherAssetsCurrent_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherAssetsCurrent_lbl0" xml:lang="en-US">Other current assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAssetsCurrent" xlink:to="us-gaap_OtherAssetsCurrent_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_LossContingencyAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LossContingencyAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LossContingencyAbstract_lbl" xml:lang="en-US">Loss Contingency [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LossContingencyAbstract" xlink:to="us-gaap_LossContingencyAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfAssetRetirementObligationsAbstract" xlink:href="nn-20210930.xsd#nn_ScheduleOfAssetRetirementObligationsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_ScheduleOfAssetRetirementObligationsAbstract_lbl" xml:lang="en-US">Schedule of asset retirement obligations [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfAssetRetirementObligationsAbstract" xlink:to="nn_ScheduleOfAssetRetirementObligationsAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_AssetRetirementObligation" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetRetirementObligation"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_AssetRetirementObligation_lbl" xml:lang="en-US">Beginning Balance</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetRetirementObligation" xlink:to="us-gaap_AssetRetirementObligation_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_AssetRetirementObligation_lbl0" xml:lang="en-US">Ending Balance</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetRetirementObligation" xlink:to="us-gaap_AssetRetirementObligation_lbl0"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfDepreciationIsComputedUsingTheStraightLineMethodAbstract" xlink:href="nn-20210930.xsd#nn_ScheduleOfDepreciationIsComputedUsingTheStraightLineMethodAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_ScheduleOfDepreciationIsComputedUsingTheStraightLineMethodAbstract_lbl" xml:lang="en-US">Schedule of depreciation is computed using the straight-line method [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfDepreciationIsComputedUsingTheStraightLineMethodAbstract" xlink:to="nn_ScheduleOfDepreciationIsComputedUsingTheStraightLineMethodAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_lbl" xml:lang="en-US">Finite-Lived Intangible Assets by Major Class [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:to="us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfCompanySRevenueDisaggregatedByCategoryAndSourceAbstract" xlink:href="nn-20210930.xsd#nn_ScheduleOfCompanySRevenueDisaggregatedByCategoryAndSourceAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_ScheduleOfCompanySRevenueDisaggregatedByCategoryAndSourceAbstract_lbl" xml:lang="en-US">Schedule of company&#8217;s revenue disaggregated by category and source [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfCompanySRevenueDisaggregatedByCategoryAndSourceAbstract" xlink:to="nn_ScheduleOfCompanySRevenueDisaggregatedByCategoryAndSourceAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfDeterminationOfTheDilutedWeightedAverageSharesAbstract" xlink:href="nn-20210930.xsd#nn_ScheduleOfDeterminationOfTheDilutedWeightedAverageSharesAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_ScheduleOfDeterminationOfTheDilutedWeightedAverageSharesAbstract_lbl" xml:lang="en-US">Schedule of determination of the diluted weighted average shares [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfDeterminationOfTheDilutedWeightedAverageSharesAbstract" xlink:to="nn_ScheduleOfDeterminationOfTheDilutedWeightedAverageSharesAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_AttAgreementAbstract" xlink:href="nn-20210930.xsd#nn_AttAgreementAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_AttAgreementAbstract_lbl" xml:lang="en-US">ATT Agreement [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_AttAgreementAbstract" xlink:to="nn_AttAgreementAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_SheduleOfBlackScholesOptionPricingModeAbstract" xlink:href="nn-20210930.xsd#nn_SheduleOfBlackScholesOptionPricingModeAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_SheduleOfBlackScholesOptionPricingModeAbstract_lbl" xml:lang="en-US">Shedule of Black-Scholes option-pricing mode [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SheduleOfBlackScholesOptionPricingModeAbstract" xlink:to="nn_SheduleOfBlackScholesOptionPricingModeAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentAbstract_lbl" xml:lang="en-US">Property, Plant and Equipment [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentAbstract" xlink:to="us-gaap_PropertyPlantAndEquipmentAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfPropertyAndEquipmentAbstract" xlink:href="nn-20210930.xsd#nn_ScheduleOfPropertyAndEquipmentAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_ScheduleOfPropertyAndEquipmentAbstract_lbl" xml:lang="en-US">Schedule of property and equipment [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfPropertyAndEquipmentAbstract" xlink:to="nn_ScheduleOfPropertyAndEquipmentAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" xml:lang="en-US">Long-Lived Tangible Asset [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:to="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfCapitalizedSoftwareAndExpectedAmortizationAbstract" xlink:href="nn-20210930.xsd#nn_ScheduleOfCapitalizedSoftwareAndExpectedAmortizationAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_ScheduleOfCapitalizedSoftwareAndExpectedAmortizationAbstract_lbl" xml:lang="en-US">Schedule of capitalized software and expected amortization [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfCapitalizedSoftwareAndExpectedAmortizationAbstract" xlink:to="nn_ScheduleOfCapitalizedSoftwareAndExpectedAmortizationAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfFutureAmortizationAbstract" xlink:href="nn-20210930.xsd#nn_ScheduleOfFutureAmortizationAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_ScheduleOfFutureAmortizationAbstract_lbl" xml:lang="en-US">Schedule of Future amortization [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfFutureAmortizationAbstract" xlink:to="nn_ScheduleOfFutureAmortizationAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_PayablesAndAccrualsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PayablesAndAccrualsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PayablesAndAccrualsAbstract_lbl" xml:lang="en-US">Payables and Accruals [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PayablesAndAccrualsAbstract" xlink:to="us-gaap_PayablesAndAccrualsAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfAccruedLiabilitiesAbstract" xlink:href="nn-20210930.xsd#nn_ScheduleOfAccruedLiabilitiesAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_ScheduleOfAccruedLiabilitiesAbstract_lbl" xml:lang="en-US">Schedule of accrued liabilities [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfAccruedLiabilitiesAbstract" xlink:to="nn_ScheduleOfAccruedLiabilitiesAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_lbl" xml:lang="en-US">Share-based Payment Arrangement [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:to="us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfFairValueOfUnitOptionsIssuedAbstract" xlink:href="nn-20210930.xsd#nn_ScheduleOfFairValueOfUnitOptionsIssuedAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_ScheduleOfFairValueOfUnitOptionsIssuedAbstract_lbl" xml:lang="en-US">Schedule of fair value of unit options issued [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfFairValueOfUnitOptionsIssuedAbstract" xlink:to="nn_ScheduleOfFairValueOfUnitOptionsIssuedAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfActivityUnderThePlanAbstract" xlink:href="nn-20210930.xsd#nn_ScheduleOfActivityUnderThePlanAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_ScheduleOfActivityUnderThePlanAbstract_lbl" xml:lang="en-US">Schedule of activity under the plan [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfActivityUnderThePlanAbstract" xlink:to="nn_ScheduleOfActivityUnderThePlanAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl" xml:lang="en-US">Options to Acquire Units, Options outstanding at December 31, 2019</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl0" xml:lang="en-US">Options to Acquire Units, Options outstanding at December 31, 2020</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_lbl" xml:lang="en-US">Weighted Average Exercise Price per Unit, Options outstanding at December 31, 2019</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_lbl0" xml:lang="en-US">Weighted Average Exercise Price per Unit, Options outstanding at December 31, 2020</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding_lbl" xml:lang="en-US">Aggregate Intrinsic Value, Options outstanding at December 31, 2019</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding_lbl0" xml:lang="en-US">Aggregate Intrinsic Value, Options outstanding at December 31, 2020</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding_lbl0"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfWeightedAverageGrantDateFairValueUnderThePlanAbstract" xlink:href="nn-20210930.xsd#nn_ScheduleOfWeightedAverageGrantDateFairValueUnderThePlanAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_ScheduleOfWeightedAverageGrantDateFairValueUnderThePlanAbstract_lbl" xml:lang="en-US">Schedule of weighted average grant date fair value under the plan [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfWeightedAverageGrantDateFairValueUnderThePlanAbstract" xlink:to="nn_ScheduleOfWeightedAverageGrantDateFairValueUnderThePlanAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue_lbl" xml:lang="en-US">Options nonvested, beginning Balance</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue_lbl"/>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue_lbl0"/>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_lbl0" xml:lang="en-US">Weighted-Average Grant-Date Fair Value, Ending Balance</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_lbl0"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FinancialInstrumentAxis_lbl" xml:lang="en-US">Financial Instrument [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancialInstrumentAxis" xlink:to="us-gaap_FinancialInstrumentAxis_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl" xml:lang="en-US">Profit Interest Units, Units outstanding at January 1, 2020</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl0" xml:lang="en-US">Profit Interest Units, Units outstanding at December 31, 2020</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl0"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="nn_WeightedAverageDistributionHurdlePerUnitUnitsOutstandings_lbl" xml:lang="en-US">Weighted Average Distribution Hurdle per Unit, Units outstanding at January 1, 2020</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WeightedAverageDistributionHurdlePerUnitUnitsOutstandings" xlink:to="nn_WeightedAverageDistributionHurdlePerUnitUnitsOutstandings_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="nn_WeightedAverageDistributionHurdlePerUnitUnitsOutstandings_lbl0" xml:lang="en-US">Weighted Average Distribution Hurdle per Unit, Units outstanding at December 31, 2020</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WeightedAverageDistributionHurdlePerUnitUnitsOutstandings" xlink:to="nn_WeightedAverageDistributionHurdlePerUnitUnitsOutstandings_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_lbl" xml:lang="en-US">Aggregate Intrinsic Value, Units outstanding at January 1, 2020</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_lbl0" xml:lang="en-US">Aggregate Intrinsic Value, Units outstanding at December 31, 2020</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_lbl0"/>
    <loc xlink:type="locator" xlink:label="nn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionNonvestedNumber" xlink:href="nn-20210930.xsd#nn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionNonvestedNumber"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="nn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionNonvestedNumber_lbl" xml:lang="en-US">Units nonvested, Beginning Balance</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionNonvestedNumber" xlink:to="nn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionNonvestedNumber_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="nn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionNonvestedNumber_lbl0" xml:lang="en-US">Units nonvested, Ending Balance</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionNonvestedNumber" xlink:to="nn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionNonvestedNumber_lbl0"/>
    <loc xlink:type="locator" xlink:label="nn_WeightedAverageGrantDateFairValuesBeginningBalance" xlink:href="nn-20210930.xsd#nn_WeightedAverageGrantDateFairValuesBeginningBalance"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="nn_WeightedAverageGrantDateFairValuesBeginningBalance_lbl" xml:lang="en-US">Weighted-Average Grant-Date Fair Value, Beginning Balance</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WeightedAverageGrantDateFairValuesBeginningBalance" xlink:to="nn_WeightedAverageGrantDateFairValuesBeginningBalance_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="nn_WeightedAverageGrantDateFairValuesBeginningBalance_lbl0" xml:lang="en-US">Weighted-Average Grant-Date Fair Value, Ending Balance</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WeightedAverageGrantDateFairValuesBeginningBalance" xlink:to="nn_WeightedAverageGrantDateFairValuesBeginningBalance_lbl0"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfDistributionHurdlesPerUnitForProfitsInterestUnitsOutstandingAbstract" xlink:href="nn-20210930.xsd#nn_ScheduleOfDistributionHurdlesPerUnitForProfitsInterestUnitsOutstandingAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_ScheduleOfDistributionHurdlesPerUnitForProfitsInterestUnitsOutstandingAbstract_lbl" xml:lang="en-US">Schedule of distribution hurdles per unit for Profits Interest Units outstanding [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfDistributionHurdlesPerUnitForProfitsInterestUnitsOutstandingAbstract" xlink:to="nn_ScheduleOfDistributionHurdlesPerUnitForProfitsInterestUnitsOutstandingAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfTotalEquityBasedCompensationExpenseAbstract" xlink:href="nn-20210930.xsd#nn_ScheduleOfTotalEquityBasedCompensationExpenseAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_ScheduleOfTotalEquityBasedCompensationExpenseAbstract_lbl" xml:lang="en-US">Schedule of total equity-based compensation expense [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfTotalEquityBasedCompensationExpenseAbstract" xlink:to="nn_ScheduleOfTotalEquityBasedCompensationExpenseAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfFutureMinimumPaymentsUnderTheseOperatingLeaseAgreementsAbstract" xlink:href="nn-20210930.xsd#nn_ScheduleOfFutureMinimumPaymentsUnderTheseOperatingLeaseAgreementsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_ScheduleOfFutureMinimumPaymentsUnderTheseOperatingLeaseAgreementsAbstract_lbl" xml:lang="en-US">Schedule of future minimum payments under these operating lease agreements [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfFutureMinimumPaymentsUnderTheseOperatingLeaseAgreementsAbstract" xlink:to="nn_ScheduleOfFutureMinimumPaymentsUnderTheseOperatingLeaseAgreementsAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfConsolidatedTemporaryDifferencesComprisedOfNetDeferredTaxAssetsAbstract" xlink:href="nn-20210930.xsd#nn_ScheduleOfConsolidatedTemporaryDifferencesComprisedOfNetDeferredTaxAssetsAbstract"/>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfConsolidatedTemporaryDifferencesComprisedOfNetDeferredTaxAssetsAbstract" xlink:to="nn_ScheduleOfConsolidatedTemporaryDifferencesComprisedOfNetDeferredTaxAssetsAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_DeferredTaxAssetsLiabilitiesNet" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNet"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_DeferredTaxAssetsLiabilitiesNet_lbl" xml:lang="en-US">Total</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsLiabilitiesNet" xlink:to="us-gaap_DeferredTaxAssetsLiabilitiesNet_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_CompensationAndRetirementDisclosureAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CompensationAndRetirementDisclosureAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CompensationAndRetirementDisclosureAbstract_lbl" xml:lang="en-US">Retirement Benefits [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CompensationAndRetirementDisclosureAbstract" xlink:to="us-gaap_CompensationAndRetirementDisclosureAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="dei_DocumentType" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_DocumentType"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_DocumentType_lbl" xml:lang="en-US">Document Type</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentType" xlink:to="dei_DocumentType_lbl"/>
    <loc xlink:type="locator" xlink:label="dei_EntityRegistrantName" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityRegistrantName"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_EntityRegistrantName_lbl" xml:lang="en-US">Entity Registrant Name</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityRegistrantName" xlink:to="dei_EntityRegistrantName_lbl"/>
    <loc xlink:type="locator" xlink:label="dei_EntityIncorporationStateCountryCode" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityIncorporationStateCountryCode"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xml:lang="en-US">Entity Incorporation, State or Country Code</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityIncorporationStateCountryCode" xlink:to="dei_EntityIncorporationStateCountryCode_lbl"/>
    <loc xlink:type="locator" xlink:label="dei_EntityFilerCategory" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityFilerCategory"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_EntityFilerCategory_lbl" xml:lang="en-US">Entity Filer Category</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityFilerCategory" xlink:to="dei_EntityFilerCategory_lbl"/>
    <loc xlink:type="locator" xlink:label="dei_EntitySmallBusiness" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntitySmallBusiness"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_EntitySmallBusiness_lbl" xml:lang="en-US">Entity Small Business</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntitySmallBusiness" xlink:to="dei_EntitySmallBusiness_lbl"/>
    <loc xlink:type="locator" xlink:label="dei_EntityEmergingGrowthCompany" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityEmergingGrowthCompany"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xml:lang="en-US">Entity Emerging Growth Company</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityEmergingGrowthCompany" xlink:to="dei_EntityEmergingGrowthCompany_lbl"/>
    <loc xlink:type="locator" xlink:label="dei_EntityExTransitionPeriod" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityExTransitionPeriod"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_EntityExTransitionPeriod_lbl" xml:lang="en-US">Entity Ex Transition Period</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityExTransitionPeriod" xlink:to="dei_EntityExTransitionPeriod_lbl"/>
    <loc xlink:type="locator" xlink:label="dei_AmendmentFlag" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_AmendmentFlag"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_AmendmentFlag_lbl" xml:lang="en-US">Amendment Flag</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_AmendmentFlag" xlink:to="dei_AmendmentFlag_lbl"/>
    <loc xlink:type="locator" xlink:label="dei_EntityCentralIndexKey" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityCentralIndexKey"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_EntityCentralIndexKey_lbl" xml:lang="en-US">Entity Central Index Key</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityCentralIndexKey" xlink:to="dei_EntityCentralIndexKey_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xml:lang="en-US">Liabilities and Deficit</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:to="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl0" xml:lang="en-US">Liabilities and Stockholders&#8217; Equity</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:to="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl1" xml:lang="en-US">Liabilities and members&#8217; deficit</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:to="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl1"/>
    <loc xlink:type="locator" xlink:label="us-gaap_DueToAffiliateCurrentAndNoncurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DueToAffiliateCurrentAndNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DueToAffiliateCurrentAndNoncurrent_lbl" xml:lang="en-US">Due to affiliate</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DueToAffiliateCurrentAndNoncurrent" xlink:to="us-gaap_DueToAffiliateCurrentAndNoncurrent_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_CommitmentsAndContingencies" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommitmentsAndContingencies"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xml:lang="en-US">Commitments and Contingencies</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommitmentsAndContingencies" xlink:to="us-gaap_CommitmentsAndContingencies_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_StockholdersEquityAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquityAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xml:lang="en-US">Deficit:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityAbstract" xlink:to="us-gaap_StockholdersEquityAbstract_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_StockholdersEquityAbstract_lbl0" xml:lang="en-US">Stockholders&#8217; Equity:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityAbstract" xlink:to="us-gaap_StockholdersEquityAbstract_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:label="us-gaap_StockholdersEquityAbstract_lbl1" xml:lang="en-US">Members&#8217; deficit:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityAbstract" xlink:to="us-gaap_StockholdersEquityAbstract_lbl1"/>
    <loc xlink:type="locator" xlink:label="us-gaap_CommonStockValue" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonStockValue_lbl" xml:lang="en-US">Common stock, value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockValue" xlink:to="us-gaap_CommonStockValue_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CommonStockValue_lbl0" xml:lang="en-US">Class A common stock</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockValue" xlink:to="us-gaap_CommonStockValue_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockParOrStatedValuePerShare"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xml:lang="en-US">Common stock par value (in Dollars per share)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockParOrStatedValuePerShare" xlink:to="us-gaap_CommonStockParOrStatedValuePerShare_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl0" xml:lang="en-US">Common units par value (in Dollars per share)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockParOrStatedValuePerShare" xlink:to="us-gaap_CommonStockParOrStatedValuePerShare_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl1" xml:lang="en-US">Common stock, par value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockParOrStatedValuePerShare" xlink:to="us-gaap_CommonStockParOrStatedValuePerShare_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl2" xml:lang="en-US">Price per share (in Dollars per share)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockParOrStatedValuePerShare" xlink:to="us-gaap_CommonStockParOrStatedValuePerShare_lbl2"/>
    <loc xlink:type="locator" xlink:label="us-gaap_CommonStockSharesAuthorized" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockSharesAuthorized"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xml:lang="en-US">Common stock, shares authorized</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesAuthorized" xlink:to="us-gaap_CommonStockSharesAuthorized_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl0" xml:lang="en-US">Common stock, share authorized</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesAuthorized" xlink:to="us-gaap_CommonStockSharesAuthorized_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_CommonStockSharesIssued" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockSharesIssued"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xml:lang="en-US">Common stock, shares issued</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesIssued" xlink:to="us-gaap_CommonStockSharesIssued_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_CommonStockSharesOutstanding" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xml:lang="en-US">Common stock, shares outstanding</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesOutstanding" xlink:to="us-gaap_CommonStockSharesOutstanding_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xml:lang="en-US">Accumulated deficit</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RetainedEarningsAccumulatedDeficit" xlink:to="us-gaap_RetainedEarningsAccumulatedDeficit_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_LiabilitiesCurrentAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xml:lang="en-US">Current liabilities:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesCurrentAbstract" xlink:to="us-gaap_LiabilitiesCurrentAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_AccruedExpensesCurrent" xlink:href="nn-20210930.xsd#nn_AccruedExpensesCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_AccruedExpensesCurrent_lbl" xml:lang="en-US">Accrued expenses</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_AccruedExpensesCurrent" xlink:to="nn_AccruedExpensesCurrent_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_AssetsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AssetsAbstract_lbl" xml:lang="en-US">Assets:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsAbstract" xlink:to="us-gaap_AssetsAbstract_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_AssetsAbstract_lbl0" xml:lang="en-US">Assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsAbstract" xlink:to="us-gaap_AssetsAbstract_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_AssetsCurrentAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsCurrentAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AssetsCurrentAbstract_lbl" xml:lang="en-US">Current Assets:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsCurrentAbstract" xlink:to="us-gaap_AssetsCurrentAbstract_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_AssetsCurrentAbstract_lbl0" xml:lang="en-US">Current assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsCurrentAbstract" xlink:to="us-gaap_AssetsCurrentAbstract_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:label="us-gaap_AssetsCurrentAbstract_lbl1" xml:lang="en-US">Current assets:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsCurrentAbstract" xlink:to="us-gaap_AssetsCurrentAbstract_lbl1"/>
    <loc xlink:type="locator" xlink:label="us-gaap_Cash" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Cash"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_Cash_lbl" xml:lang="en-US">Cash</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Cash" xlink:to="us-gaap_Cash_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_PrepaidExpenseCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PrepaidExpenseCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PrepaidExpenseCurrent_lbl" xml:lang="en-US">Prepaid expenses</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PrepaidExpenseCurrent" xlink:to="us-gaap_PrepaidExpenseCurrent_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_DueFromRelatedPartiesCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DueFromRelatedPartiesCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DueFromRelatedPartiesCurrent_lbl" xml:lang="en-US">Due from Sponsor</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DueFromRelatedPartiesCurrent" xlink:to="us-gaap_DueFromRelatedPartiesCurrent_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_AssetsHeldInTrustNoncurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsHeldInTrustNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AssetsHeldInTrustNoncurrent_lbl" xml:lang="en-US">Cash and securities held in Trust Account</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsHeldInTrustNoncurrent" xlink:to="us-gaap_AssetsHeldInTrustNoncurrent_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_AssetsHeldInTrustNoncurrent_lbl0" xml:lang="en-US">Assets Held-in-trust, Noncurrent</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsHeldInTrustNoncurrent" xlink:to="us-gaap_AssetsHeldInTrustNoncurrent_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_AccountsPayableAndOtherAccruedLiabilitiesCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsPayableAndOtherAccruedLiabilitiesCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AccountsPayableAndOtherAccruedLiabilitiesCurrent_lbl" xml:lang="en-US">Accounts payable and accrued expenses</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsPayableAndOtherAccruedLiabilitiesCurrent" xlink:to="us-gaap_AccountsPayableAndOtherAccruedLiabilitiesCurrent_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_DueToOtherRelatedPartiesClassifiedCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DueToOtherRelatedPartiesClassifiedCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DueToOtherRelatedPartiesClassifiedCurrent_lbl" xml:lang="en-US">Due to related party</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DueToOtherRelatedPartiesClassifiedCurrent" xlink:to="us-gaap_DueToOtherRelatedPartiesClassifiedCurrent_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_DerivativeLiabilitiesNoncurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeLiabilitiesNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DerivativeLiabilitiesNoncurrent_lbl" xml:lang="en-US">Warrant liability</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeLiabilitiesNoncurrent" xlink:to="us-gaap_DerivativeLiabilitiesNoncurrent_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_LoansPayable" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LoansPayable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LoansPayable_lbl" xml:lang="en-US">Working capital loan</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LoansPayable" xlink:to="us-gaap_LoansPayable_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent_lbl" xml:lang="en-US">Deferred underwriters&#8217; discount</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent" xlink:to="us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_TemporaryEquityCarryingAmountAttributableToParent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TemporaryEquityCarryingAmountAttributableToParent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_TemporaryEquityCarryingAmountAttributableToParent_lbl" xml:lang="en-US">Class A common stock subject to possible redemption</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TemporaryEquityCarryingAmountAttributableToParent" xlink:to="us-gaap_TemporaryEquityCarryingAmountAttributableToParent_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_CommonStockSubjectToPossibleRedemption" xlink:href="nn-20210930.xsd#nn_CommonStockSubjectToPossibleRedemption"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_CommonStockSubjectToPossibleRedemption_lbl" xml:lang="en-US">Common stock subject to possible redemption</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonStockSubjectToPossibleRedemption" xlink:to="nn_CommonStockSubjectToPossibleRedemption_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="nn_CommonStockSubjectToPossibleRedemption_lbl0" xml:lang="en-US">Shares subject to possible redemption</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonStockSubjectToPossibleRedemption" xlink:to="nn_CommonStockSubjectToPossibleRedemption_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_PreferredStockValue" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PreferredStockValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PreferredStockValue_lbl" xml:lang="en-US">Preferred stock, value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockValue" xlink:to="us-gaap_PreferredStockValue_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PreferredStockParOrStatedValuePerShare"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare_lbl" xml:lang="en-US">Preferred stock par value (in Dollars per share)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockParOrStatedValuePerShare" xlink:to="us-gaap_PreferredStockParOrStatedValuePerShare_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare_lbl0" xml:lang="en-US">Preferred stock, par value (in Dollars per share)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockParOrStatedValuePerShare" xlink:to="us-gaap_PreferredStockParOrStatedValuePerShare_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_PreferredStockSharesAuthorized" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PreferredStockSharesAuthorized"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl" xml:lang="en-US">Preference shares, shares authorized</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockSharesAuthorized" xlink:to="us-gaap_PreferredStockSharesAuthorized_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl0" xml:lang="en-US">Preferred stock, shares authorized</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockSharesAuthorized" xlink:to="us-gaap_PreferredStockSharesAuthorized_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_PreferredStockSharesIssued" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PreferredStockSharesIssued"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PreferredStockSharesIssued_lbl" xml:lang="en-US">Preference shares, shares issued</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockSharesIssued" xlink:to="us-gaap_PreferredStockSharesIssued_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_PreferredStockSharesOutstanding" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PreferredStockSharesOutstanding"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PreferredStockSharesOutstanding_lbl" xml:lang="en-US">Preference shares, shares outstanding</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockSharesOutstanding" xlink:to="us-gaap_PreferredStockSharesOutstanding_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_CommonStockValue1" xlink:href="nn-20210930.xsd#nn_CommonStockValue1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_CommonStockValue1_lbl" xml:lang="en-US">Class A common stock, $0.0001 par value; 200,000,000 shares authorized; 3,785,182 and 3,340,686 shares issued and outstanding (excluding shares subject to possible redemption) at June 30, 2021 and December 31, 2020, respectively</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonStockValue1" xlink:to="nn_CommonStockValue1_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_CommonStockValue2" xlink:href="nn-20210930.xsd#nn_CommonStockValue2"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_CommonStockValue2_lbl" xml:lang="en-US">Class B common stock, $0.0001 par value; 20,000,000 shares authorized; 5,000,000 shares issued and outstanding at June 30, 2021 and December 31, 2020, respectively</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonStockValue2" xlink:to="nn_CommonStockValue2_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_AdditionalPaidInCapital" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdditionalPaidInCapital"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AdditionalPaidInCapital_lbl" xml:lang="en-US">Additional paid-in capital</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdditionalPaidInCapital" xlink:to="us-gaap_AdditionalPaidInCapital_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_AdditionalPaidInCapital_lbl0" xml:lang="en-US">Additional paid-in-capital</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdditionalPaidInCapital" xlink:to="us-gaap_AdditionalPaidInCapital_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_RestrictedCashCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestrictedCashCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RestrictedCashCurrent_lbl" xml:lang="en-US">Restricted cash</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestrictedCashCurrent" xlink:to="us-gaap_RestrictedCashCurrent_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_CommitmentFeeAsset" xlink:href="nn-20210930.xsd#nn_CommitmentFeeAsset"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_CommitmentFeeAsset_lbl" xml:lang="en-US">Commitment fee asset</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommitmentFeeAsset" xlink:to="nn_CommitmentFeeAsset_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_NetworkUnderConstruction" xlink:href="nn-20210930.xsd#nn_NetworkUnderConstruction"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_NetworkUnderConstruction_lbl" xml:lang="en-US">Network under construction</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_NetworkUnderConstruction" xlink:to="nn_NetworkUnderConstruction_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentOther" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentOther"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PropertyPlantAndEquipmentOther_lbl" xml:lang="en-US">Property and equipment, net</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentOther" xlink:to="us-gaap_PropertyPlantAndEquipmentOther_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_FlightEquipmentAccumulatedDepreciation" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FlightEquipmentAccumulatedDepreciation"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FlightEquipmentAccumulatedDepreciation_lbl" xml:lang="en-US">Property and equipment, net of accumulated depreciation (in Dollars)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FlightEquipmentAccumulatedDepreciation" xlink:to="us-gaap_FlightEquipmentAccumulatedDepreciation_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet_lbl" xml:lang="en-US">Intangible assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsNet" xlink:to="us-gaap_FiniteLivedIntangibleAssetsNet_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_OtherAssets" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherAssets"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherAssets_lbl" xml:lang="en-US">Other assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAssets" xlink:to="us-gaap_OtherAssets_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_AccountsPayableCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsPayableCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AccountsPayableCurrent_lbl" xml:lang="en-US">Accounts payable</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsPayableCurrent" xlink:to="us-gaap_AccountsPayableCurrent_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_DerivativeLiabilities" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeLiabilities"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DerivativeLiabilities_lbl" xml:lang="en-US">Warrants</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeLiabilities" xlink:to="us-gaap_DerivativeLiabilities_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DerivativeLiabilities_lbl0" xml:lang="en-US">Warrant liability</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeLiabilities" xlink:to="us-gaap_DerivativeLiabilities_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_SecuredDebt" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SecuredDebt"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SecuredDebt_lbl" xml:lang="en-US">Senior secured loan</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SecuredDebt" xlink:to="us-gaap_SecuredDebt_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_LiabilitiesOtherThanLongtermDebtNoncurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesOtherThanLongtermDebtNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LiabilitiesOtherThanLongtermDebtNoncurrent_lbl" xml:lang="en-US">Other long-term liabilities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesOtherThanLongtermDebtNoncurrent" xlink:to="us-gaap_LiabilitiesOtherThanLongtermDebtNoncurrent_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_PreferredInterestsAbstract" xlink:href="nn-20210930.xsd#nn_PreferredInterestsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_PreferredInterestsAbstract_lbl" xml:lang="en-US">Preferred Interests:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PreferredInterestsAbstract" xlink:to="nn_PreferredInterestsAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_PreferredStockValue1" xlink:href="nn-20210930.xsd#nn_PreferredStockValue1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_PreferredStockValue1_lbl" xml:lang="en-US">Class C Convertible Preferred Units, authorized 13,400,000 units; 13,361,628 units issued and outstanding at June 30, 2021 and December 31, 2020; aggregate liquidation preference of $11,879,116 at both June 30, 2021 and December 31, 2020</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PreferredStockValue1" xlink:to="nn_PreferredStockValue1_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_PreferredStockLiquidationPreferenceValue" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PreferredStockLiquidationPreferenceValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PreferredStockLiquidationPreferenceValue_lbl" xml:lang="en-US">Liquidation preference value (in Dollars)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockLiquidationPreferenceValue" xlink:to="us-gaap_PreferredStockLiquidationPreferenceValue_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_PreferredStockValue2" xlink:href="nn-20210930.xsd#nn_PreferredStockValue2"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_PreferredStockValue2_lbl" xml:lang="en-US">Class D Convertible Preferred Units, authorized 94,550,000 units; 71,338,498 units issued and outstanding at June 30, 2021 and December 31, 2020; aggregate liquidation preference of $371,556,207 and $357,724,977 at June 30, 2021 and December 31, 2020, respectively</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PreferredStockValue2" xlink:to="nn_PreferredStockValue2_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_TotalPreferredInterest" xlink:href="nn-20210930.xsd#nn_TotalPreferredInterest"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="nn_TotalPreferredInterest_lbl" xml:lang="en-US">Total preferred interests</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_TotalPreferredInterest" xlink:to="nn_TotalPreferredInterest_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_CommonStockValue3" xlink:href="nn-20210930.xsd#nn_CommonStockValue3"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_CommonStockValue3_lbl" xml:lang="en-US">Class A Common Units, authorized 128,508,093 units; 10,753,375 units issued and outstanding at June 30, 2021 and December 31, 2020</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonStockValue3" xlink:to="nn_CommonStockValue3_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_CommonStockValue4" xlink:href="nn-20210930.xsd#nn_CommonStockValue4"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_CommonStockValue4_lbl" xml:lang="en-US">Class B-1 Common Units, authorized 5,199,202 units; 5,162,816 units issued and outstanding at June 30, 2021 and December 31, 2020</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonStockValue4" xlink:to="nn_CommonStockValue4_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_CommonStockValue5" xlink:href="nn-20210930.xsd#nn_CommonStockValue5"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_CommonStockValue5_lbl" xml:lang="en-US">Class B-2 Common Units, authorized 250,000 units; 250,000 units issued and outstanding at June 30, 2021 and December 31, 2020</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonStockValue5" xlink:to="nn_CommonStockValue5_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_CommonStockValue6" xlink:href="nn-20210930.xsd#nn_CommonStockValue6"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_CommonStockValue6_lbl" xml:lang="en-US">Class B-3 Common Units, authorized 250,000 units; 250,000 units issued and outstanding at June 30, 2021 and December 31, 2020</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonStockValue6" xlink:to="nn_CommonStockValue6_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_CommonStockValue7" xlink:href="nn-20210930.xsd#nn_CommonStockValue7"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_CommonStockValue7_lbl" xml:lang="en-US">Class B-4 Common Units, authorized 4,500,000 units; 4,483,971 issued and outstanding at June 30, 2021 and December 31, 2020</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonStockValue7" xlink:to="nn_CommonStockValue7_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xml:lang="en-US">Accumulated other comprehensive loss</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:to="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_DeferredRevenueCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredRevenueCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DeferredRevenueCurrent_lbl" xml:lang="en-US">Deferred revenue</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredRevenueCurrent" xlink:to="us-gaap_DeferredRevenueCurrent_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_PreferredInterestsAbstract0" xlink:href="nn-20210930.xsd#nn_PreferredInterestsAbstract0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_PreferredInterestsAbstract0_lbl" xml:lang="en-US">Preferred Interests:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PreferredInterestsAbstract0" xlink:to="nn_PreferredInterestsAbstract0_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_FormationAndOperatingCosts" xlink:href="nn-20210930.xsd#nn_FormationAndOperatingCosts"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_FormationAndOperatingCosts_lbl" xml:lang="en-US">Operating costs</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FormationAndOperatingCosts" xlink:to="nn_FormationAndOperatingCosts_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_OtherNonoperatingIncomeExpenseAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpenseAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherNonoperatingIncomeExpenseAbstract_lbl" xml:lang="en-US">Other income (expense):</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherNonoperatingIncomeExpenseAbstract" xlink:to="us-gaap_OtherNonoperatingIncomeExpenseAbstract_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_OtherNonoperatingIncomeExpenseAbstract_lbl0" xml:lang="en-US">Other (expense) income</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherNonoperatingIncomeExpenseAbstract" xlink:to="us-gaap_OtherNonoperatingIncomeExpenseAbstract_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_InterestIncomeOther" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestIncomeOther"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InterestIncomeOther_lbl" xml:lang="en-US">Interest earned on cash and marketable securities held in Trust Account</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestIncomeOther" xlink:to="us-gaap_InterestIncomeOther_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_BasicAndDilutedWeightedAverageSharesOutstandingCommonStockSubjectToPossibleRedemption" xlink:href="nn-20210930.xsd#nn_BasicAndDilutedWeightedAverageSharesOutstandingCommonStockSubjectToPossibleRedemption"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_BasicAndDilutedWeightedAverageSharesOutstandingCommonStockSubjectToPossibleRedemption_lbl" xml:lang="en-US">Basic and diluted weighted average shares outstanding, Class A common stock subject to possible redemption (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_BasicAndDilutedWeightedAverageSharesOutstandingCommonStockSubjectToPossibleRedemption" xlink:to="nn_BasicAndDilutedWeightedAverageSharesOutstandingCommonStockSubjectToPossibleRedemption_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_BasicAndDilutedNetIncomePerShareRedemption" xlink:href="nn-20210930.xsd#nn_BasicAndDilutedNetIncomePerShareRedemption"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_BasicAndDilutedNetIncomePerShareRedemption_lbl" xml:lang="en-US">Basic and diluted net loss per share (in Dollars per share)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_BasicAndDilutedNetIncomePerShareRedemption" xlink:to="nn_BasicAndDilutedNetIncomePerShareRedemption_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_WeightedAverageNumberOfSharesCommonStockSubjectToRepurchaseOrCancellation" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesCommonStockSubjectToRepurchaseOrCancellation"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_WeightedAverageNumberOfSharesCommonStockSubjectToRepurchaseOrCancellation_lbl" xml:lang="en-US">Basic and diluted weighted average shares outstanding, non-redeemable common stock (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WeightedAverageNumberOfSharesCommonStockSubjectToRepurchaseOrCancellation" xlink:to="us-gaap_WeightedAverageNumberOfSharesCommonStockSubjectToRepurchaseOrCancellation_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_BasicAndDilutedNetLossPerNonredeemableCommonShare" xlink:href="nn-20210930.xsd#nn_BasicAndDilutedNetLossPerNonredeemableCommonShare"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_BasicAndDilutedNetLossPerNonredeemableCommonShare_lbl" xml:lang="en-US">Basic and diluted net loss per non-redeemable common share (in Dollars per share)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_BasicAndDilutedNetLossPerNonredeemableCommonShare" xlink:to="nn_BasicAndDilutedNetLossPerNonredeemableCommonShare_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_InvestmentIncomeInterestAndDividend" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InvestmentIncomeInterestAndDividend"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InvestmentIncomeInterestAndDividend_lbl" xml:lang="en-US">Interest income</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentIncomeInterestAndDividend" xlink:to="us-gaap_InvestmentIncomeInterestAndDividend_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_BasicAndDilutedNetIncomePerShare" xlink:href="nn-20210930.xsd#nn_BasicAndDilutedNetIncomePerShare"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_BasicAndDilutedNetIncomePerShare_lbl" xml:lang="en-US">Basic and diluted net income per share (in Dollars per share)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_BasicAndDilutedNetIncomePerShare" xlink:to="nn_BasicAndDilutedNetIncomePerShare_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_Revenues" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Revenues"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_Revenues_lbl" xml:lang="en-US">Revenue</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Revenues" xlink:to="us-gaap_Revenues_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_OperatingExpensesAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingExpensesAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OperatingExpensesAbstract_lbl" xml:lang="en-US">Operating expenses</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingExpensesAbstract" xlink:to="us-gaap_OperatingExpensesAbstract_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_OperatingExpensesAbstract_lbl0" xml:lang="en-US">Operating expenses:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingExpensesAbstract" xlink:to="us-gaap_OperatingExpensesAbstract_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_OtherCostAndExpenseOperating" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherCostAndExpenseOperating"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherCostAndExpenseOperating_lbl" xml:lang="en-US">Cost of goods sold (exclusive of depreciation and amortization)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherCostAndExpenseOperating" xlink:to="us-gaap_OtherCostAndExpenseOperating_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ResearchAndDevelopmentExpense" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ResearchAndDevelopmentExpense"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ResearchAndDevelopmentExpense_lbl" xml:lang="en-US">Research and development</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ResearchAndDevelopmentExpense" xlink:to="us-gaap_ResearchAndDevelopmentExpense_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense_lbl" xml:lang="en-US">Selling, general and administrative</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SellingGeneralAndAdministrativeExpense" xlink:to="us-gaap_SellingGeneralAndAdministrativeExpense_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_DepreciationAndAmortization" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DepreciationAndAmortization"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DepreciationAndAmortization_lbl" xml:lang="en-US">Depreciation and amortization</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DepreciationAndAmortization" xlink:to="us-gaap_DepreciationAndAmortization_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_OtherExpensesAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherExpensesAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherExpensesAbstract_lbl" xml:lang="en-US">Other expenses:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherExpensesAbstract" xlink:to="us-gaap_OtherExpensesAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_OtherNonoperatingIncomeExpense" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl" xml:lang="en-US">Other expenses, net</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherNonoperatingIncomeExpense" xlink:to="us-gaap_OtherNonoperatingIncomeExpense_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ComprehensiveIncomeNetOfTax" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ComprehensiveIncomeNetOfTax_lbl" xml:lang="en-US">Comprehensive loss</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ComprehensiveIncomeNetOfTax" xlink:to="us-gaap_ComprehensiveIncomeNetOfTax_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_MarketableSecuritiesUnrealizedGainLoss" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MarketableSecuritiesUnrealizedGainLoss"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MarketableSecuritiesUnrealizedGainLoss_lbl" xml:lang="en-US">Change in redemption value of preferred interest</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MarketableSecuritiesUnrealizedGainLoss" xlink:to="us-gaap_MarketableSecuritiesUnrealizedGainLoss_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_lbl" xml:lang="en-US">Weighted average units outstanding &#8211; basic and diluted (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted" xlink:to="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_lbl0" xml:lang="en-US">Basic and diluted weighted-average shares outstanding, Class A and Class B common stock (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted" xlink:to="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:label="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_lbl1" xml:lang="en-US">Weighted Average Units &#8211; basic and diluted (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted" xlink:to="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_lbl1"/>
    <loc xlink:type="locator" xlink:label="us-gaap_EarningsPerShareBasicAndDiluted" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EarningsPerShareBasicAndDiluted"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EarningsPerShareBasicAndDiluted_lbl" xml:lang="en-US">Net loss attributable to common unit holder per unit &#8211; basic and diluted (in Dollars per share)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerShareBasicAndDiluted" xlink:to="us-gaap_EarningsPerShareBasicAndDiluted_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_EarningsPerShareBasicAndDiluted_lbl0" xml:lang="en-US">Basic and diluted net loss per share (in Dollars per share)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerShareBasicAndDiluted" xlink:to="us-gaap_EarningsPerShareBasicAndDiluted_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_UnrealizedGainLossOnDerivatives" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_UnrealizedGainLossOnDerivatives"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_UnrealizedGainLossOnDerivatives_lbl" xml:lang="en-US">Change in fair value of derivative</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnrealizedGainLossOnDerivatives" xlink:to="us-gaap_UnrealizedGainLossOnDerivatives_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_lbl" xml:lang="en-US">Net loss</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:to="us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodValueOther" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueOther"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodValueOther_lbl" xml:lang="en-US">Other offering expenses</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueOther" xlink:to="us-gaap_StockIssuedDuringPeriodValueOther_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodValueOther_lbl0" xml:lang="en-US">Proceeds of PIPE investment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueOther" xlink:to="us-gaap_StockIssuedDuringPeriodValueOther_lbl0"/>
    <loc xlink:type="locator" xlink:label="nn_StockIssuedDuringPeriodCommonStockSubjectToPossibleRedemption" xlink:href="nn-20210930.xsd#nn_StockIssuedDuringPeriodCommonStockSubjectToPossibleRedemption"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_StockIssuedDuringPeriodCommonStockSubjectToPossibleRedemption_lbl" xml:lang="en-US">Change in Class A common stock subject to possible redemption</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StockIssuedDuringPeriodCommonStockSubjectToPossibleRedemption" xlink:to="nn_StockIssuedDuringPeriodCommonStockSubjectToPossibleRedemption_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_StockIssuedDuringPeriodCancellationOfCommonStockShares" xlink:href="nn-20210930.xsd#nn_StockIssuedDuringPeriodCancellationOfCommonStockShares"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_StockIssuedDuringPeriodCancellationOfCommonStockShares_lbl" xml:lang="en-US">Change in Class A common stock subject to possible redemption (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StockIssuedDuringPeriodCancellationOfCommonStockShares" xlink:to="nn_StockIssuedDuringPeriodCancellationOfCommonStockShares_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodValueIssuedForServices" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueIssuedForServices"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodValueIssuedForServices_lbl" xml:lang="en-US">Class B common stock issued to Sponsor</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueIssuedForServices" xlink:to="us-gaap_StockIssuedDuringPeriodValueIssuedForServices_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodSharesIssuedForServices" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesIssuedForServices"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodSharesIssuedForServices_lbl" xml:lang="en-US">Class B common stock issued to Sponsor (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesIssuedForServices" xlink:to="us-gaap_StockIssuedDuringPeriodSharesIssuedForServices_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_StockIssuedDuringPeriodValueOfCancellationOfClassBCommonStock" xlink:href="nn-20210930.xsd#nn_StockIssuedDuringPeriodValueOfCancellationOfClassBCommonStock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_StockIssuedDuringPeriodValueOfCancellationOfClassBCommonStock_lbl" xml:lang="en-US">Cancellation of Class B common stock</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StockIssuedDuringPeriodValueOfCancellationOfClassBCommonStock" xlink:to="nn_StockIssuedDuringPeriodValueOfCancellationOfClassBCommonStock_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_StockIssuedDuringPeriodCommonStockSubjectToPossibleRedemptionShares" xlink:href="nn-20210930.xsd#nn_StockIssuedDuringPeriodCommonStockSubjectToPossibleRedemptionShares"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_StockIssuedDuringPeriodCommonStockSubjectToPossibleRedemptionShares_lbl" xml:lang="en-US">Cancellation of Class B common stock (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StockIssuedDuringPeriodCommonStockSubjectToPossibleRedemptionShares" xlink:to="nn_StockIssuedDuringPeriodCommonStockSubjectToPossibleRedemptionShares_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_SaleOfStockConsiderationReceivedOnTransaction" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SaleOfStockConsiderationReceivedOnTransaction"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SaleOfStockConsiderationReceivedOnTransaction_lbl" xml:lang="en-US">Sale of 20,000,000 Units on October 19, 2020 through public offering</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SaleOfStockConsiderationReceivedOnTransaction" xlink:to="us-gaap_SaleOfStockConsiderationReceivedOnTransaction_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_SaleOfStockConsiderationReceivedOnTransaction_lbl0" xml:lang="en-US">Gross proceeds</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SaleOfStockConsiderationReceivedOnTransaction" xlink:to="us-gaap_SaleOfStockConsiderationReceivedOnTransaction_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_lbl" xml:lang="en-US">Sale of 20,000,000 Units on October 19, 2020 through public offering (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:to="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_lbl0" xml:lang="en-US">Number of units (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:to="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_lbl0"/>
    <loc xlink:type="locator" xlink:label="nn_SaleOfUnitsThroughPublicOffering" xlink:href="nn-20210930.xsd#nn_SaleOfUnitsThroughPublicOffering"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_SaleOfUnitsThroughPublicOffering_lbl" xml:lang="en-US">Sale of Units through public offering</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SaleOfUnitsThroughPublicOffering" xlink:to="nn_SaleOfUnitsThroughPublicOffering_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ProceedsFromIssuanceOfPrivatePlacement" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromIssuanceOfPrivatePlacement"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProceedsFromIssuanceOfPrivatePlacement_lbl" xml:lang="en-US">Sale of 8,750,000 Private Placement Warrants on October 19, 2020</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceOfPrivatePlacement" xlink:to="us-gaap_ProceedsFromIssuanceOfPrivatePlacement_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ProceedsFromIssuanceOfPrivatePlacement_lbl0" xml:lang="en-US">Proceeds from Private Placement Warrants</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceOfPrivatePlacement" xlink:to="us-gaap_ProceedsFromIssuanceOfPrivatePlacement_lbl0"/>
    <loc xlink:type="locator" xlink:label="nn_SaleOfPrivatePlacementWarrants" xlink:href="nn-20210930.xsd#nn_SaleOfPrivatePlacementWarrants"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_SaleOfPrivatePlacementWarrants_lbl" xml:lang="en-US">Sale of Private Placement Warrants</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SaleOfPrivatePlacementWarrants" xlink:to="nn_SaleOfPrivatePlacementWarrants_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_lbl" xml:lang="en-US">Forfeiture of Class B common stock</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation" xlink:to="us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_lbl" xml:lang="en-US">Forfeiture of Class B common stock (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation" xlink:to="us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_StockIssuedDuringPeriodUnderwritersDiscount" xlink:href="nn-20210930.xsd#nn_StockIssuedDuringPeriodUnderwritersDiscount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_StockIssuedDuringPeriodUnderwritersDiscount_lbl" xml:lang="en-US">Underwriters&#8217; discount</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StockIssuedDuringPeriodUnderwritersDiscount" xlink:to="nn_StockIssuedDuringPeriodUnderwritersDiscount_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_StockIssuedDuringPeriodDeferredUnderwritersDiscount" xlink:href="nn-20210930.xsd#nn_StockIssuedDuringPeriodDeferredUnderwritersDiscount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_StockIssuedDuringPeriodDeferredUnderwritersDiscount_lbl" xml:lang="en-US">Deferred underwriters&#8217; discount</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StockIssuedDuringPeriodDeferredUnderwritersDiscount" xlink:to="nn_StockIssuedDuringPeriodDeferredUnderwritersDiscount_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_StockIssuedDurimgPeriodValueOFInitialClassificationOfWarrantLiability" xlink:href="nn-20210930.xsd#nn_StockIssuedDurimgPeriodValueOFInitialClassificationOfWarrantLiability"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_StockIssuedDurimgPeriodValueOFInitialClassificationOfWarrantLiability_lbl" xml:lang="en-US">Initial classification of warrant liability</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StockIssuedDurimgPeriodValueOFInitialClassificationOfWarrantLiability" xlink:to="nn_StockIssuedDurimgPeriodValueOFInitialClassificationOfWarrantLiability_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_StockIssuedDuringPeriodValueOfTransactionCostsAllocatedToWarrantLiability" xlink:href="nn-20210930.xsd#nn_StockIssuedDuringPeriodValueOfTransactionCostsAllocatedToWarrantLiability"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_StockIssuedDuringPeriodValueOfTransactionCostsAllocatedToWarrantLiability_lbl" xml:lang="en-US">Transaction costs allocated to warrant liability</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StockIssuedDuringPeriodValueOfTransactionCostsAllocatedToWarrantLiability" xlink:to="nn_StockIssuedDuringPeriodValueOfTransactionCostsAllocatedToWarrantLiability_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_StockRedeemedOrCalledDuringPeriodValue" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockRedeemedOrCalledDuringPeriodValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockRedeemedOrCalledDuringPeriodValue_lbl" xml:lang="en-US">Reclassification of common stock subject to possible redemption</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockRedeemedOrCalledDuringPeriodValue" xlink:to="us-gaap_StockRedeemedOrCalledDuringPeriodValue_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_StockRedeemedOrCalledDuringPeriodShares" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockRedeemedOrCalledDuringPeriodShares"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockRedeemedOrCalledDuringPeriodShares_lbl" xml:lang="en-US">Reclassification of common stock subject to possible redemption (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockRedeemedOrCalledDuringPeriodShares" xlink:to="us-gaap_StockRedeemedOrCalledDuringPeriodShares_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_StockissuedduringperiodvalueequitybasedCompensationExpense" xlink:href="nn-20210930.xsd#nn_StockissuedduringperiodvalueequitybasedCompensationExpense"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_StockissuedduringperiodvalueequitybasedCompensationExpense_lbl" xml:lang="en-US">Equity-based compensation expense</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StockissuedduringperiodvalueequitybasedCompensationExpense" xlink:to="nn_StockissuedduringperiodvalueequitybasedCompensationExpense_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" xml:lang="en-US">Issuance of common warrants</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:to="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl0" xml:lang="en-US">Class A common stock amount</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:to="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl0"/>
    <loc xlink:type="locator" xlink:label="nn_StockIssuedDuringPeriodValueOfChangeInRedemptionValue" xlink:href="nn-20210930.xsd#nn_StockIssuedDuringPeriodValueOfChangeInRedemptionValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_StockIssuedDuringPeriodValueOfChangeInRedemptionValue_lbl" xml:lang="en-US">Change in Redemption Value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StockIssuedDuringPeriodValueOfChangeInRedemptionValue" xlink:to="nn_StockIssuedDuringPeriodValueOfChangeInRedemptionValue_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossBeforeTax" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ForeignCurrencyTransactionGainLossBeforeTax"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_lbl" xml:lang="en-US">Foreign currency translation adjustment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ForeignCurrencyTransactionGainLossBeforeTax" xlink:to="us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xml:lang="en-US">Exercise of Common Unit options (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:to="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_StockIssuedDuringPeriodValueOfVestingOfCommonWarrants" xlink:href="nn-20210930.xsd#nn_StockIssuedDuringPeriodValueOfVestingOfCommonWarrants"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_StockIssuedDuringPeriodValueOfVestingOfCommonWarrants_lbl" xml:lang="en-US">Vesting of common warrants</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StockIssuedDuringPeriodValueOfVestingOfCommonWarrants" xlink:to="nn_StockIssuedDuringPeriodValueOfVestingOfCommonWarrants_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_lbl" xml:lang="en-US">Exercise of Common Unit options</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised" xlink:to="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_StockIssuedDuringPeriodSharesOfCancellationOfCommonUnits" xlink:href="nn-20210930.xsd#nn_StockIssuedDuringPeriodSharesOfCancellationOfCommonUnits"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_StockIssuedDuringPeriodSharesOfCancellationOfCommonUnits_lbl" xml:lang="en-US">Cancellation of Common Units (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StockIssuedDuringPeriodSharesOfCancellationOfCommonUnits" xlink:to="nn_StockIssuedDuringPeriodSharesOfCancellationOfCommonUnits_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities_lbl" xml:lang="en-US">Issuance of Preferred Class D Units in exchange for debt extinguishment (net of issuance costs)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities" xlink:to="us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_lbl" xml:lang="en-US">Issuance of Preferred Class D Units in exchange for debt extinguishment (net of issuance costs) (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities" xlink:to="us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xml:lang="en-US">Issuance of Common Units (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:to="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl0" xml:lang="en-US">Class A common stock shares (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:to="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xml:lang="en-US">Cash flows from Operating Activities:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl0" xml:lang="en-US">Cash flows used in operating activities:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl1" xml:lang="en-US">Cash Flows from Operating Activities:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl2" xml:lang="en-US">Operating activities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl2"/>
    <loc xlink:type="locator" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xml:lang="en-US">Adjustments to reconcile net loss to net cash used in operating activities:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl0" xml:lang="en-US">Adjustments to reconcile net loss to net cash from operating activities:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xml:lang="en-US">Changes in operating assets and liabilities:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:to="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInDueToAffiliates" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInDueToAffiliates"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncreaseDecreaseInDueToAffiliates_lbl" xml:lang="en-US">Due to affiliate</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInDueToAffiliates" xlink:to="us-gaap_IncreaseDecreaseInDueToAffiliates_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilitiesAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilitiesAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilitiesAbstract_lbl" xml:lang="en-US">Increase in liabilities:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInAccruedLiabilitiesAbstract" xlink:to="us-gaap_IncreaseDecreaseInAccruedLiabilitiesAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilities" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilities"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilities_lbl" xml:lang="en-US">Accrued expenses and other liabilities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInAccruedLiabilities" xlink:to="us-gaap_IncreaseDecreaseInAccruedLiabilities_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_FairValueAdjustmentOfWarrants" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAdjustmentOfWarrants"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueAdjustmentOfWarrants_lbl" xml:lang="en-US">Change in fair value of warrant liability</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAdjustmentOfWarrants" xlink:to="us-gaap_FairValueAdjustmentOfWarrants_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_FairValueAdjustmentOfWarrants_lbl0" xml:lang="en-US">Change in fair value of warrant liability</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAdjustmentOfWarrants" xlink:to="us-gaap_FairValueAdjustmentOfWarrants_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_FairValueAdjustmentOfWarrants_lbl1" xml:lang="en-US">Warrants</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAdjustmentOfWarrants" xlink:to="us-gaap_FairValueAdjustmentOfWarrants_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:label="us-gaap_FairValueAdjustmentOfWarrants_lbl2" xml:lang="en-US">Fair value of issuance (in Dollars)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAdjustmentOfWarrants" xlink:to="us-gaap_FairValueAdjustmentOfWarrants_lbl2"/>
    <loc xlink:type="locator" xlink:label="nn_ExpensesPaidBySponsor" xlink:href="nn-20210930.xsd#nn_ExpensesPaidBySponsor"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ExpensesPaidBySponsor_lbl" xml:lang="en-US">Expenses paid by Sponsor</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ExpensesPaidBySponsor" xlink:to="nn_ExpensesPaidBySponsor_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingAssetsAndLiabilitiesNetAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssetsAndLiabilitiesNetAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingAssetsAndLiabilitiesNetAbstract_lbl" xml:lang="en-US">Changes in operating assets and liabilities:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInOtherOperatingAssetsAndLiabilitiesNetAbstract" xlink:to="us-gaap_IncreaseDecreaseInOtherOperatingAssetsAndLiabilitiesNetAbstract_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingAssetsAndLiabilitiesNetAbstract_lbl0" xml:lang="en-US">Changes in current assets and liabilities:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInOtherOperatingAssetsAndLiabilitiesNetAbstract" xlink:to="us-gaap_IncreaseDecreaseInOtherOperatingAssetsAndLiabilitiesNetAbstract_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable_lbl" xml:lang="en-US">Accounts payable</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInAccountsPayable" xlink:to="us-gaap_IncreaseDecreaseInAccountsPayable_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" xml:lang="en-US">Cash flows from Investing Activities:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl0" xml:lang="en-US">Cash Flows from Investing Activities:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl1" xml:lang="en-US">Investing activities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl1"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities_lbl" xml:lang="en-US">Maturity of marketable securities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities" xlink:to="us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xml:lang="en-US">Cash flows from Financing Activities:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl0" xml:lang="en-US">Cash Flows from Financing Activities:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl1" xml:lang="en-US">Financing activities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl1"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ProceedsFromRelatedPartyDebt" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromRelatedPartyDebt"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProceedsFromRelatedPartyDebt_lbl" xml:lang="en-US">Proceeds from issuance of promissory note to related party</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromRelatedPartyDebt" xlink:to="us-gaap_ProceedsFromRelatedPartyDebt_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_SupplementalCashFlowElementsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SupplementalCashFlowElementsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SupplementalCashFlowElementsAbstract_lbl" xml:lang="en-US">Supplemental disclosure of cash flow information:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SupplementalCashFlowElementsAbstract" xlink:to="us-gaap_SupplementalCashFlowElementsAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_IncomeTaxesPaid" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeTaxesPaid"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncomeTaxesPaid_lbl" xml:lang="en-US">Cash taxes paid</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxesPaid" xlink:to="us-gaap_IncomeTaxesPaid_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_NoncashInvestingAndFinancingItemsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NoncashInvestingAndFinancingItemsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NoncashInvestingAndFinancingItemsAbstract_lbl" xml:lang="en-US">Supplemental disclosure of non-cash financing activities:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NoncashInvestingAndFinancingItemsAbstract" xlink:to="us-gaap_NoncashInvestingAndFinancingItemsAbstract_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_NoncashInvestingAndFinancingItemsAbstract_lbl0" xml:lang="en-US">Supplemental Disclosure of Non-cash Financing Activities:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NoncashInvestingAndFinancingItemsAbstract" xlink:to="us-gaap_NoncashInvestingAndFinancingItemsAbstract_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:label="us-gaap_NoncashInvestingAndFinancingItemsAbstract_lbl1" xml:lang="en-US">Non-cash financing information</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NoncashInvestingAndFinancingItemsAbstract" xlink:to="us-gaap_NoncashInvestingAndFinancingItemsAbstract_lbl1"/>
    <loc xlink:type="locator" xlink:label="nn_IncreaseInAccountsPayableAndAccruedExpenseForDeferredOfferingCosts" xlink:href="nn-20210930.xsd#nn_IncreaseInAccountsPayableAndAccruedExpenseForDeferredOfferingCosts"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_IncreaseInAccountsPayableAndAccruedExpenseForDeferredOfferingCosts_lbl" xml:lang="en-US">Increase in accounts payable and accrued expenses for deferred offering costs</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_IncreaseInAccountsPayableAndAccruedExpenseForDeferredOfferingCosts" xlink:to="nn_IncreaseInAccountsPayableAndAccruedExpenseForDeferredOfferingCosts_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_TransactionCostsAllocatedToWarrantLiabilities" xlink:href="nn-20210930.xsd#nn_TransactionCostsAllocatedToWarrantLiabilities"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_TransactionCostsAllocatedToWarrantLiabilities_lbl" xml:lang="en-US">Transaction costs allocated to warrant liability</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_TransactionCostsAllocatedToWarrantLiabilities" xlink:to="nn_TransactionCostsAllocatedToWarrantLiabilities_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ProceedsFromIssuanceInitialPublicOffering" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromIssuanceInitialPublicOffering"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProceedsFromIssuanceInitialPublicOffering_lbl" xml:lang="en-US">Proceeds from initial public offering, net of underwriting discounts paid</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceInitialPublicOffering" xlink:to="us-gaap_ProceedsFromIssuanceInitialPublicOffering_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xml:lang="en-US">Proceeds from sale of common stock to initial stockholders</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:to="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_AccruedDeferredUnderwritingFee" xlink:href="nn-20210930.xsd#nn_AccruedDeferredUnderwritingFee"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_AccruedDeferredUnderwritingFee_lbl" xml:lang="en-US">Accrued deferred underwriting fee</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_AccruedDeferredUnderwritingFee" xlink:to="nn_AccruedDeferredUnderwritingFee_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_InitialClassificationOfWarrantLiabilities" xlink:href="nn-20210930.xsd#nn_InitialClassificationOfWarrantLiabilities"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_InitialClassificationOfWarrantLiabilities_lbl" xml:lang="en-US">Initial classification of warrant liability</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_InitialClassificationOfWarrantLiabilities" xlink:to="nn_InitialClassificationOfWarrantLiabilities_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_DepreciationDepletionAndAmortization" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DepreciationDepletionAndAmortization_lbl" xml:lang="en-US">Depreciation and amortization</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DepreciationDepletionAndAmortization" xlink:to="us-gaap_DepreciationDepletionAndAmortization_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_EmployeeBenefitsAndShareBasedCompensation" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeBenefitsAndShareBasedCompensation"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EmployeeBenefitsAndShareBasedCompensation_lbl" xml:lang="en-US">Equity-based compensation</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeBenefitsAndShareBasedCompensation" xlink:to="us-gaap_EmployeeBenefitsAndShareBasedCompensation_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_EmployeeBenefitsAndShareBasedCompensation_lbl0" xml:lang="en-US">Equity-based compensation expense</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeBenefitsAndShareBasedCompensation" xlink:to="us-gaap_EmployeeBenefitsAndShareBasedCompensation_lbl0"/>
    <loc xlink:type="locator" xlink:label="nn_FixedAssetWriteoff" xlink:href="nn-20210930.xsd#nn_FixedAssetWriteoff"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_FixedAssetWriteoff_lbl" xml:lang="en-US">Fixed asset write-off</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FixedAssetWriteoff" xlink:to="nn_FixedAssetWriteoff_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_IssuanceOfWarrantsForRentExpense" xlink:href="nn-20210930.xsd#nn_IssuanceOfWarrantsForRentExpense"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_IssuanceOfWarrantsForRentExpense_lbl" xml:lang="en-US">Issuance of warrants for rent expense</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_IssuanceOfWarrantsForRentExpense" xlink:to="nn_IssuanceOfWarrantsForRentExpense_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_AssetRetirementObligationAccretion" xlink:href="nn-20210930.xsd#nn_AssetRetirementObligationAccretion"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_AssetRetirementObligationAccretion_lbl" xml:lang="en-US">Asset retirement obligation accretion</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_AssetRetirementObligationAccretion" xlink:to="nn_AssetRetirementObligationAccretion_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_AmortizationOfDebtIssuanceCostsAndDiscount" xlink:href="nn-20210930.xsd#nn_AmortizationOfDebtIssuanceCostsAndDiscount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_AmortizationOfDebtIssuanceCostsAndDiscount_lbl" xml:lang="en-US">Amortization of debt issuance costs and discount</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_AmortizationOfDebtIssuanceCostsAndDiscount" xlink:to="nn_AmortizationOfDebtIssuanceCostsAndDiscount_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_PaidInKindInterest" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaidInKindInterest"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PaidInKindInterest_lbl" xml:lang="en-US">Accrued payment in kind (PIK) interest on debt</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaidInKindInterest" xlink:to="us-gaap_PaidInKindInterest_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_PaidInKindInterest_lbl0" xml:lang="en-US">Senior secured loan, paid-in-kind interest</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaidInKindInterest" xlink:to="us-gaap_PaidInKindInterest_lbl0"/>
    <loc xlink:type="locator" xlink:label="nn_ProceedsFromSeniorSecuredLoan" xlink:href="nn-20210930.xsd#nn_ProceedsFromSeniorSecuredLoan"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ProceedsFromSeniorSecuredLoan_lbl" xml:lang="en-US">Proceeds from senior secured loan</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ProceedsFromSeniorSecuredLoan" xlink:to="nn_ProceedsFromSeniorSecuredLoan_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_SeniorSecuredLoanIssuanceCosts" xlink:href="nn-20210930.xsd#nn_SeniorSecuredLoanIssuanceCosts"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_SeniorSecuredLoanIssuanceCosts_lbl" xml:lang="en-US">Senior secured loan issuance costs</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SeniorSecuredLoanIssuanceCosts" xlink:to="nn_SeniorSecuredLoanIssuanceCosts_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_IssuanceOfWarrants" xlink:href="nn-20210930.xsd#nn_IssuanceOfWarrants"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_IssuanceOfWarrants_lbl" xml:lang="en-US">Issuance of warrants</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_IssuanceOfWarrants" xlink:to="nn_IssuanceOfWarrants_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_AssetRetirementObligationAccretionExpense" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetRetirementObligationAccretionExpense"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AssetRetirementObligationAccretionExpense_lbl" xml:lang="en-US">Asset retirement obligation accretion</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetRetirementObligationAccretionExpense" xlink:to="us-gaap_AssetRetirementObligationAccretionExpense_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_AssetRetirementObligationAccretionExpense_lbl0" xml:lang="en-US">Accretion</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetRetirementObligationAccretionExpense" xlink:to="us-gaap_AssetRetirementObligationAccretionExpense_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInDeferredRevenue" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInDeferredRevenue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncreaseDecreaseInDeferredRevenue_lbl" xml:lang="en-US">Deferred revenue</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInDeferredRevenue" xlink:to="us-gaap_IncreaseDecreaseInDeferredRevenue_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ProceedsFromConvertibleDebt" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromConvertibleDebt"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProceedsFromConvertibleDebt_lbl" xml:lang="en-US">Proceeds from convertible notes, net</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromConvertibleDebt" xlink:to="us-gaap_ProceedsFromConvertibleDebt_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ProceedsFromExerciseOfClassAUnitOptions" xlink:href="nn-20210930.xsd#nn_ProceedsFromExerciseOfClassAUnitOptions"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ProceedsFromExerciseOfClassAUnitOptions_lbl" xml:lang="en-US">Proceeds from exercise of Class A unit options</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ProceedsFromExerciseOfClassAUnitOptions" xlink:to="nn_ProceedsFromExerciseOfClassAUnitOptions_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xml:lang="en-US">Effect of exchange rates on cash, cash equivalents and restricted cash</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:to="us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_SettlementOfNotesPayableForClassDPreferredShares" xlink:href="nn-20210930.xsd#nn_SettlementOfNotesPayableForClassDPreferredShares"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_SettlementOfNotesPayableForClassDPreferredShares_lbl" xml:lang="en-US">Settlement of notes payable for Class D preferred shares</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SettlementOfNotesPayableForClassDPreferredShares" xlink:to="nn_SettlementOfNotesPayableForClassDPreferredShares_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_FinancingCostsAccruedButNotPaid" xlink:href="nn-20210930.xsd#nn_FinancingCostsAccruedButNotPaid"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_FinancingCostsAccruedButNotPaid_lbl" xml:lang="en-US">Financing costs accrued but not paid</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FinancingCostsAccruedButNotPaid" xlink:to="nn_FinancingCostsAccruedButNotPaid_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_InterestExpense" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestExpense"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_InterestExpense_lbl" xml:lang="en-US">Interest expense</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestExpense" xlink:to="us-gaap_InterestExpense_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_IncomeTaxExpenseBenefit" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xml:lang="en-US">Provision for income taxes</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxExpenseBenefit" xlink:to="us-gaap_IncomeTaxExpenseBenefit_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl0" xml:lang="en-US">Income tax provision</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxExpenseBenefit" xlink:to="us-gaap_IncomeTaxExpenseBenefit_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_lbl" xml:lang="en-US">Foreign currency translation adjustment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xlink:to="us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_AccretionOfInterestOnCashAndMarketableSecuritiesHeldInTrustAccount" xlink:href="nn-20210930.xsd#nn_AccretionOfInterestOnCashAndMarketableSecuritiesHeldInTrustAccount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="nn_AccretionOfInterestOnCashAndMarketableSecuritiesHeldInTrustAccount_lbl" xml:lang="en-US">Accretion of interest on cash and marketable securities held in Trust Account</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_AccretionOfInterestOnCashAndMarketableSecuritiesHeldInTrustAccount" xlink:to="nn_AccretionOfInterestOnCashAndMarketableSecuritiesHeldInTrustAccount_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInPrepaidExpense" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidExpense"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_IncreaseDecreaseInPrepaidExpense_lbl" xml:lang="en-US">Prepaid expenses</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInPrepaidExpense" xlink:to="us-gaap_IncreaseDecreaseInPrepaidExpense_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_PaymentsToAcquireHeldToMaturitySecurities" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsToAcquireHeldToMaturitySecurities"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_PaymentsToAcquireHeldToMaturitySecurities_lbl" xml:lang="en-US">Purchase of marketable securities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquireHeldToMaturitySecurities" xlink:to="us-gaap_PaymentsToAcquireHeldToMaturitySecurities_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_TransferOfCashFromTrustForPaymentOfDelawareStateFranchiseTax" xlink:href="nn-20210930.xsd#nn_TransferOfCashFromTrustForPaymentOfDelawareStateFranchiseTax"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="nn_TransferOfCashFromTrustForPaymentOfDelawareStateFranchiseTax_lbl" xml:lang="en-US">Transfer of cash from trust for payment of Delaware state franchise tax</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_TransferOfCashFromTrustForPaymentOfDelawareStateFranchiseTax" xlink:to="nn_TransferOfCashFromTrustForPaymentOfDelawareStateFranchiseTax_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ChangeInValueOfClassACommonStockSubjectToPossibleRedemption" xlink:href="nn-20210930.xsd#nn_ChangeInValueOfClassACommonStockSubjectToPossibleRedemption"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="nn_ChangeInValueOfClassACommonStockSubjectToPossibleRedemption_lbl" xml:lang="en-US">Change in value of Class A common stock subject to possible redemption</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ChangeInValueOfClassACommonStockSubjectToPossibleRedemption" xlink:to="nn_ChangeInValueOfClassACommonStockSubjectToPossibleRedemption_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ChangeInValueOfClassACommonStockSubjectToPossibleRedemption_lbl0" xml:lang="en-US">Change in value of Class A common stock subject to possible redemption</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ChangeInValueOfClassACommonStockSubjectToPossibleRedemption" xlink:to="nn_ChangeInValueOfClassACommonStockSubjectToPossibleRedemption_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_PaymentsToAcquireOtherInvestments" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsToAcquireOtherInvestments"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_PaymentsToAcquireOtherInvestments_lbl" xml:lang="en-US">Purchase of investment held in Trust Account</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquireOtherInvestments" xlink:to="us-gaap_PaymentsToAcquireOtherInvestments_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_PrincipalDepositedInTrustAccount" xlink:href="nn-20210930.xsd#nn_PrincipalDepositedInTrustAccount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="nn_PrincipalDepositedInTrustAccount_lbl" xml:lang="en-US">Principal deposited in Trust Account</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PrincipalDepositedInTrustAccount" xlink:to="nn_PrincipalDepositedInTrustAccount_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_RepaymentOfPromissoryNoteToSponsors" xlink:href="nn-20210930.xsd#nn_RepaymentOfPromissoryNoteToSponsors"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="nn_RepaymentOfPromissoryNoteToSponsors_lbl" xml:lang="en-US">Repayment of Promissory Note to Sponsor</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_RepaymentOfPromissoryNoteToSponsors" xlink:to="nn_RepaymentOfPromissoryNoteToSponsors_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_PaymentOfOfferingCosts" xlink:href="nn-20210930.xsd#nn_PaymentOfOfferingCosts"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="nn_PaymentOfOfferingCosts_lbl" xml:lang="en-US">Payment of offering costs</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PaymentOfOfferingCosts" xlink:to="nn_PaymentOfOfferingCosts_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_InitialValueOfClassACommonStockSubjectToPossibleRedemption" xlink:href="nn-20210930.xsd#nn_InitialValueOfClassACommonStockSubjectToPossibleRedemption"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="nn_InitialValueOfClassACommonStockSubjectToPossibleRedemption_lbl" xml:lang="en-US">Initial value of Class A common stock subject to possible redemption</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_InitialValueOfClassACommonStockSubjectToPossibleRedemption" xlink:to="nn_InitialValueOfClassACommonStockSubjectToPossibleRedemption_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_IncreaseDecreaseInOtherCurrentAsset" xlink:href="nn-20210930.xsd#nn_IncreaseDecreaseInOtherCurrentAsset"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="nn_IncreaseDecreaseInOtherCurrentAsset_lbl" xml:lang="en-US">Other current assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_IncreaseDecreaseInOtherCurrentAsset" xlink:to="nn_IncreaseDecreaseInOtherCurrentAsset_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xml:lang="en-US">Capitalization of costs and purchases of network assets, property, and equipment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:to="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_PurchaseOfInternalUseSoftware" xlink:href="nn-20210930.xsd#nn_PurchaseOfInternalUseSoftware"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="nn_PurchaseOfInternalUseSoftware_lbl" xml:lang="en-US">Purchase of internal use software</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PurchaseOfInternalUseSoftware" xlink:to="nn_PurchaseOfInternalUseSoftware_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_DerivativeGainLossOnDerivativeNet" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeGainLossOnDerivativeNet"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_DerivativeGainLossOnDerivativeNet_lbl" xml:lang="en-US">Change in fair value of derivative</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeGainLossOnDerivativeNet" xlink:to="us-gaap_DerivativeGainLossOnDerivativeNet_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_GainsLossesOnExtinguishmentOfDebt" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_GainsLossesOnExtinguishmentOfDebt_lbl" xml:lang="en-US">Gain on extinguishment of debt</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GainsLossesOnExtinguishmentOfDebt" xlink:to="us-gaap_GainsLossesOnExtinguishmentOfDebt_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_RepaymentsOfConvertibleDebt" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RepaymentsOfConvertibleDebt"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_RepaymentsOfConvertibleDebt_lbl" xml:lang="en-US">Convertible note repayment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RepaymentsOfConvertibleDebt" xlink:to="us-gaap_RepaymentsOfConvertibleDebt_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_CommonClassAMember" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonClassAMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonClassAMember_lbl" xml:lang="en-US">Class A Common Stock</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonClassAMember" xlink:to="us-gaap_CommonClassAMember_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CommonClassAMember_lbl0" xml:lang="en-US">Class A</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonClassAMember" xlink:to="us-gaap_CommonClassAMember_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:label="us-gaap_CommonClassAMember_lbl1" xml:lang="en-US">Class A Common Stock [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonClassAMember" xlink:to="us-gaap_CommonClassAMember_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonClassAMember_lbl2" xml:lang="en-US">Common Class A [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonClassAMember" xlink:to="us-gaap_CommonClassAMember_lbl2"/>
    <loc xlink:type="locator" xlink:label="us-gaap_CommonClassBMember" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonClassBMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonClassBMember_lbl" xml:lang="en-US">Class B Common Stock</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonClassBMember" xlink:to="us-gaap_CommonClassBMember_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CommonClassBMember_lbl0" xml:lang="en-US">Class B</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonClassBMember" xlink:to="us-gaap_CommonClassBMember_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:label="us-gaap_CommonClassBMember_lbl1" xml:lang="en-US">Class B common stock [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonClassBMember" xlink:to="us-gaap_CommonClassBMember_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonClassBMember_lbl2" xml:lang="en-US">Class B Common Stock [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonClassBMember" xlink:to="us-gaap_CommonClassBMember_lbl2"/>
    <loc xlink:type="locator" xlink:label="nn_ClassCConvertiblePreferredMember" xlink:href="nn-20210930.xsd#nn_ClassCConvertiblePreferredMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ClassCConvertiblePreferredMember_lbl" xml:lang="en-US">Class C Convertible Preferred Units</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ClassCConvertiblePreferredMember" xlink:to="nn_ClassCConvertiblePreferredMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ClassDConvertiblePreferredMember" xlink:href="nn-20210930.xsd#nn_ClassDConvertiblePreferredMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ClassDConvertiblePreferredMember_lbl" xml:lang="en-US">Class D Convertible Preferred Units</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ClassDConvertiblePreferredMember" xlink:to="nn_ClassDConvertiblePreferredMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ClassACommonUnitsMember" xlink:href="nn-20210930.xsd#nn_ClassACommonUnitsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ClassACommonUnitsMember_lbl" xml:lang="en-US">Class A Common Units</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ClassACommonUnitsMember" xlink:to="nn_ClassACommonUnitsMember_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="nn_ClassACommonUnitsMember_lbl0" xml:lang="en-US">Class A</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ClassACommonUnitsMember" xlink:to="nn_ClassACommonUnitsMember_lbl0"/>
    <loc xlink:type="locator" xlink:label="nn_ClassB1CommonUnitsMember" xlink:href="nn-20210930.xsd#nn_ClassB1CommonUnitsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ClassB1CommonUnitsMember_lbl" xml:lang="en-US">Class B-1 Common Units</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ClassB1CommonUnitsMember" xlink:to="nn_ClassB1CommonUnitsMember_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="nn_ClassB1CommonUnitsMember_lbl0" xml:lang="en-US">Class B-1</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ClassB1CommonUnitsMember" xlink:to="nn_ClassB1CommonUnitsMember_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:label="nn_ClassB1CommonUnitsMember_lbl1" xml:lang="en-US">Class B-1 Common Units [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ClassB1CommonUnitsMember" xlink:to="nn_ClassB1CommonUnitsMember_lbl1"/>
    <loc xlink:type="locator" xlink:label="nn_ClassB2CommonUnitsMember" xlink:href="nn-20210930.xsd#nn_ClassB2CommonUnitsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ClassB2CommonUnitsMember_lbl" xml:lang="en-US">Class B-2 Common Units</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ClassB2CommonUnitsMember" xlink:to="nn_ClassB2CommonUnitsMember_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="nn_ClassB2CommonUnitsMember_lbl0" xml:lang="en-US">Class B-2</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ClassB2CommonUnitsMember" xlink:to="nn_ClassB2CommonUnitsMember_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:label="nn_ClassB2CommonUnitsMember_lbl1" xml:lang="en-US">Class B-2 Common Units [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ClassB2CommonUnitsMember" xlink:to="nn_ClassB2CommonUnitsMember_lbl1"/>
    <loc xlink:type="locator" xlink:label="nn_ClassB3CommonUnitsFiveMember" xlink:href="nn-20210930.xsd#nn_ClassB3CommonUnitsFiveMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ClassB3CommonUnitsFiveMember_lbl" xml:lang="en-US">Class B-3 Common Units</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ClassB3CommonUnitsFiveMember" xlink:to="nn_ClassB3CommonUnitsFiveMember_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="nn_ClassB3CommonUnitsFiveMember_lbl0" xml:lang="en-US">Class B-3 Common Units [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ClassB3CommonUnitsFiveMember" xlink:to="nn_ClassB3CommonUnitsFiveMember_lbl0"/>
    <loc xlink:type="locator" xlink:label="nn_ClassB4CommonUnitsMember" xlink:href="nn-20210930.xsd#nn_ClassB4CommonUnitsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ClassB4CommonUnitsMember_lbl" xml:lang="en-US">Class B-4 Common Units</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ClassB4CommonUnitsMember" xlink:to="nn_ClassB4CommonUnitsMember_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="nn_ClassB4CommonUnitsMember_lbl0" xml:lang="en-US">Class B-4</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ClassB4CommonUnitsMember" xlink:to="nn_ClassB4CommonUnitsMember_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:label="nn_ClassB4CommonUnitsMember_lbl1" xml:lang="en-US">Class B-4 Common Units [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ClassB4CommonUnitsMember" xlink:to="nn_ClassB4CommonUnitsMember_lbl1"/>
    <loc xlink:type="locator" xlink:label="nn_SpartacusAcquisitionShelfCorpMember" xlink:href="nn-20210930.xsd#nn_SpartacusAcquisitionShelfCorpMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_SpartacusAcquisitionShelfCorpMember_lbl" xml:lang="en-US">Spartacus Acquisition Shelf Corp.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SpartacusAcquisitionShelfCorpMember" xlink:to="nn_SpartacusAcquisitionShelfCorpMember_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="nn_SpartacusAcquisitionShelfCorpMember_lbl0" xml:lang="en-US">Spartacus Acquisition Shelf Corp. [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SpartacusAcquisitionShelfCorpMember" xlink:to="nn_SpartacusAcquisitionShelfCorpMember_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:label="nn_SpartacusAcquisitionShelfCorpMember_lbl1" xml:lang="en-US">Spartacus Acquisition Shelf Corp</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SpartacusAcquisitionShelfCorpMember" xlink:to="nn_SpartacusAcquisitionShelfCorpMember_lbl1"/>
    <loc xlink:type="locator" xlink:label="nn_SpartacusAcquisitionCorpMember" xlink:href="nn-20210930.xsd#nn_SpartacusAcquisitionCorpMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_SpartacusAcquisitionCorpMember_lbl" xml:lang="en-US">Spartacus Acquisition Corp</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SpartacusAcquisitionCorpMember" xlink:to="nn_SpartacusAcquisitionCorpMember_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="nn_SpartacusAcquisitionCorpMember_lbl0" xml:lang="en-US">Spartacus Acquisition Corp [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SpartacusAcquisitionCorpMember" xlink:to="nn_SpartacusAcquisitionCorpMember_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_CommonStockMember" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonStockMember_lbl" xml:lang="en-US">Common Stock</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockMember" xlink:to="us-gaap_CommonStockMember_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CommonStockMember_lbl0" xml:lang="en-US">Common Units [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockMember" xlink:to="us-gaap_CommonStockMember_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_RetainedEarningsMember" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetainedEarningsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RetainedEarningsMember_lbl" xml:lang="en-US">Accumulated Deficit</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RetainedEarningsMember" xlink:to="us-gaap_RetainedEarningsMember_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_AdditionalPaidInCapitalMember" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xml:lang="en-US">Additional Paid-in Capital</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdditionalPaidInCapitalMember" xlink:to="us-gaap_AdditionalPaidInCapitalMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_RedeemableClassCConvertiblePreferredUnitsMember" xlink:href="nn-20210930.xsd#nn_RedeemableClassCConvertiblePreferredUnitsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_RedeemableClassCConvertiblePreferredUnitsMember_lbl" xml:lang="en-US">Redeemable Class C</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_RedeemableClassCConvertiblePreferredUnitsMember" xlink:to="nn_RedeemableClassCConvertiblePreferredUnitsMember_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_PreferredStockMember" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PreferredStockMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PreferredStockMember_lbl" xml:lang="en-US">Convertible Preferred Units</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockMember" xlink:to="us-gaap_PreferredStockMember_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_PreferredStockMember_lbl0" xml:lang="en-US">Preferred Stock [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockMember" xlink:to="us-gaap_PreferredStockMember_lbl0"/>
    <loc xlink:type="locator" xlink:label="nn_RedeemableClassDConvertiblePreferredUnitsMember" xlink:href="nn-20210930.xsd#nn_RedeemableClassDConvertiblePreferredUnitsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_RedeemableClassDConvertiblePreferredUnitsMember_lbl" xml:lang="en-US">Redeemable Class D</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_RedeemableClassDConvertiblePreferredUnitsMember" xlink:to="nn_RedeemableClassDConvertiblePreferredUnitsMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_TotalPreferredInterestMember" xlink:href="nn-20210930.xsd#nn_TotalPreferredInterestMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_TotalPreferredInterestMember_lbl" xml:lang="en-US">Total Preferred Interest</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_TotalPreferredInterestMember" xlink:to="nn_TotalPreferredInterestMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_CommonStockOneMember" xlink:href="nn-20210930.xsd#nn_CommonStockOneMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_CommonStockOneMember_lbl" xml:lang="en-US">Common Units</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonStockOneMember" xlink:to="nn_CommonStockOneMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ClassB3CommonUnitsMember" xlink:href="nn-20210930.xsd#nn_ClassB3CommonUnitsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ClassB3CommonUnitsMember_lbl" xml:lang="en-US">Class B-3</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ClassB3CommonUnitsMember" xlink:to="nn_ClassB3CommonUnitsMember_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="nn_ClassB3CommonUnitsMember_lbl0" xml:lang="en-US">Class B-3 Common Units [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ClassB3CommonUnitsMember" xlink:to="nn_ClassB3CommonUnitsMember_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember_lbl" xml:lang="en-US">Accumulated Other Comprehensive (Loss)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:to="us-gaap_AccumulatedOtherComprehensiveIncomeMember_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_lbl" xml:lang="en-US">Organization and Business Operations</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock" xlink:to="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_SignificantAccountingPoliciesTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SignificantAccountingPoliciesTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SignificantAccountingPoliciesTextBlock_lbl" xml:lang="en-US">Summary of Significant Accounting Policies</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SignificantAccountingPoliciesTextBlock" xlink:to="us-gaap_SignificantAccountingPoliciesTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_CommonStockTextBlock" xlink:href="nn-20210930.xsd#nn_CommonStockTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_CommonStockTextBlock_lbl" xml:lang="en-US">Common Stock</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonStockTextBlock" xlink:to="nn_CommonStockTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_SubsequentEventsTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventsTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SubsequentEventsTextBlock_lbl" xml:lang="en-US">Subsequent Events</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventsTextBlock" xlink:to="us-gaap_SubsequentEventsTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringAndNonrecurringBasisTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringAndNonrecurringBasisTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringAndNonrecurringBasisTableTextBlock_lbl" xml:lang="en-US">Schedule of assets and liabilities that were measured at fair value on a recurring basis</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringAndNonrecurringBasisTableTextBlock" xlink:to="us-gaap_FairValueAssetsMeasuredOnRecurringAndNonrecurringBasisTableTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_LiabilitiesAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LiabilitiesAbstract_lbl" xml:lang="en-US">Liabilities:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAbstract" xlink:to="us-gaap_LiabilitiesAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_WarrantLiabilityPublicWarrants" xlink:href="nn-20210930.xsd#nn_WarrantLiabilityPublicWarrants"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_WarrantLiabilityPublicWarrants_lbl" xml:lang="en-US">Warrant Liability &#8211; Public Warrants</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WarrantLiabilityPublicWarrants" xlink:to="nn_WarrantLiabilityPublicWarrants_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_WarrantLiabilityPrivatePlacementWarrants" xlink:href="nn-20210930.xsd#nn_WarrantLiabilityPrivatePlacementWarrants"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_WarrantLiabilityPrivatePlacementWarrants_lbl" xml:lang="en-US">Warrant Liability &#8211; Private Placement Warrants</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WarrantLiabilityPrivatePlacementWarrants" xlink:to="nn_WarrantLiabilityPrivatePlacementWarrants_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfFairValueMeasurementsForBothThePublicAndPrivatePlacementTableTextBlock" xlink:href="nn-20210930.xsd#nn_ScheduleOfFairValueMeasurementsForBothThePublicAndPrivatePlacementTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ScheduleOfFairValueMeasurementsForBothThePublicAndPrivatePlacementTableTextBlock_lbl" xml:lang="en-US">Schedule of fair value measurements for both the Public and Private Placement</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfFairValueMeasurementsForBothThePublicAndPrivatePlacementTableTextBlock" xlink:to="nn_ScheduleOfFairValueMeasurementsForBothThePublicAndPrivatePlacementTableTextBlock_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="nn_ScheduleOfFairValueMeasurementsForBothThePublicAndPrivatePlacementTableTextBlock_lbl0" xml:lang="en-US">Schedule of fair value measurements for both the public and private placement</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfFairValueMeasurementsForBothThePublicAndPrivatePlacementTableTextBlock" xlink:to="nn_ScheduleOfFairValueMeasurementsForBothThePublicAndPrivatePlacementTableTextBlock_lbl0"/>
    <loc xlink:type="locator" xlink:label="nn_PrivatePlacementWarrantsAbstract" xlink:href="nn-20210930.xsd#nn_PrivatePlacementWarrantsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_PrivatePlacementWarrantsAbstract_lbl" xml:lang="en-US">Private Placement Warrants</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PrivatePlacementWarrantsAbstract" xlink:to="nn_PrivatePlacementWarrantsAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_SharePrice" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharePrice"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SharePrice_lbl" xml:lang="en-US">Stock price (in Dollars per share)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharePrice" xlink:to="us-gaap_SharePrice_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_SharePrice_lbl0" xml:lang="en-US">Stock Price</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharePrice" xlink:to="us-gaap_SharePrice_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:label="us-gaap_SharePrice_lbl1" xml:lang="en-US">Purchase price per share (in Dollars per share)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharePrice" xlink:to="us-gaap_SharePrice_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SharePrice_lbl2" xml:lang="en-US">Share price (in Dollars per share)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharePrice" xlink:to="us-gaap_SharePrice_lbl2"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice_lbl" xml:lang="en-US">Strike price (in Dollars per share)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice_lbl0" xml:lang="en-US">Strike Price</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_lbl" xml:lang="en-US">Term (in years)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_lbl0" xml:lang="en-US">Expected term (in years)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_lbl1" xml:lang="en-US">Holding Period/Term (years)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_lbl1"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_lbl" xml:lang="en-US">Volatility (pre/post business combination)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_lbl0" xml:lang="en-US">Expected volatility</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_lbl1" xml:lang="en-US">Volatility</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_lbl1"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_lbl" xml:lang="en-US">Risk-free rate</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_lbl0" xml:lang="en-US">Risk-free interest rate</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_lbl1" xml:lang="en-US">Risk-Free Rate</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_lbl1"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_lbl" xml:lang="en-US">Dividend yield</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ProbabilityOfBusinessCombination" xlink:href="nn-20210930.xsd#nn_ProbabilityOfBusinessCombination"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ProbabilityOfBusinessCombination_lbl" xml:lang="en-US">Probability of business combination</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ProbabilityOfBusinessCombination" xlink:to="nn_ProbabilityOfBusinessCombination_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_TemporaryEquityRedemptionPricePerShare" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TemporaryEquityRedemptionPricePerShare"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_TemporaryEquityRedemptionPricePerShare_lbl" xml:lang="en-US">Redemption Price (in Dollars per share)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TemporaryEquityRedemptionPricePerShare" xlink:to="us-gaap_TemporaryEquityRedemptionPricePerShare_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_TemporaryEquityRedemptionPricePerShare_lbl0" xml:lang="en-US">Redemption price</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TemporaryEquityRedemptionPricePerShare" xlink:to="us-gaap_TemporaryEquityRedemptionPricePerShare_lbl0"/>
    <loc xlink:type="locator" xlink:label="nn_FairValueOfWarrantsinPerShare" xlink:href="nn-20210930.xsd#nn_FairValueOfWarrantsinPerShare"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_FairValueOfWarrantsinPerShare_lbl" xml:lang="en-US">Fair value of warrants (in Dollars per share)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FairValueOfWarrantsinPerShare" xlink:to="nn_FairValueOfWarrantsinPerShare_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="nn_FairValueOfWarrantsinPerShare_lbl0" xml:lang="en-US">Fair value of warrants</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FairValueOfWarrantsinPerShare" xlink:to="nn_FairValueOfWarrantsinPerShare_lbl0"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfChangesInFairValueOfWarrantLiabilitiesTableTextBlock" xlink:href="nn-20210930.xsd#nn_ScheduleOfChangesInFairValueOfWarrantLiabilitiesTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ScheduleOfChangesInFairValueOfWarrantLiabilitiesTableTextBlock_lbl" xml:lang="en-US">Schedule of changes in fair value of warrant liabilities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfChangesInFairValueOfWarrantLiabilitiesTableTextBlock" xlink:to="nn_ScheduleOfChangesInFairValueOfWarrantLiabilitiesTableTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_FairValueOfInitialMeasurement" xlink:href="nn-20210930.xsd#nn_FairValueOfInitialMeasurement"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_FairValueOfInitialMeasurement_lbl" xml:lang="en-US">Initial measurement on October 19, 2020</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FairValueOfInitialMeasurement" xlink:to="nn_FairValueOfInitialMeasurement_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfWeightedAverageNonRedeemableTableTextBlock" xlink:href="nn-20210930.xsd#nn_ScheduleOfWeightedAverageNonRedeemableTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ScheduleOfWeightedAverageNonRedeemableTableTextBlock_lbl" xml:lang="en-US">Schedule of weighted average number of non-redeemable</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfWeightedAverageNonRedeemableTableTextBlock" xlink:to="nn_ScheduleOfWeightedAverageNonRedeemableTableTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_CommonStockSubjectToPossibleRedemptionAbstract" xlink:href="nn-20210930.xsd#nn_CommonStockSubjectToPossibleRedemptionAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_CommonStockSubjectToPossibleRedemptionAbstract_lbl" xml:lang="en-US">Common stock subject to possible redemption</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonStockSubjectToPossibleRedemptionAbstract" xlink:to="nn_CommonStockSubjectToPossibleRedemptionAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_NumeratorNetLossAllocableToClassACommonStockSubjectToPossibleRedemptionAbstract" xlink:href="nn-20210930.xsd#nn_NumeratorNetLossAllocableToClassACommonStockSubjectToPossibleRedemptionAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_NumeratorNetLossAllocableToClassACommonStockSubjectToPossibleRedemptionAbstract_lbl" xml:lang="en-US">Numerator: Net loss allocable to Class A common stock subject to possible redemption</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_NumeratorNetLossAllocableToClassACommonStockSubjectToPossibleRedemptionAbstract" xlink:to="nn_NumeratorNetLossAllocableToClassACommonStockSubjectToPossibleRedemptionAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_InterestAndDividendIncomeSecuritiesOther" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestAndDividendIncomeSecuritiesOther"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InterestAndDividendIncomeSecuritiesOther_lbl" xml:lang="en-US">Amortized Interest income on marketable securities held in trust</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestAndDividendIncomeSecuritiesOther" xlink:to="us-gaap_InterestAndDividendIncomeSecuritiesOther_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_NetIncomeAllocableToClassACommonStockSubjectToPossibleRedemption" xlink:href="nn-20210930.xsd#nn_NetIncomeAllocableToClassACommonStockSubjectToPossibleRedemption"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_NetIncomeAllocableToClassACommonStockSubjectToPossibleRedemption_lbl" xml:lang="en-US">Net income allocable to Class A common stock subject to possible redemption</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_NetIncomeAllocableToClassACommonStockSubjectToPossibleRedemption" xlink:to="nn_NetIncomeAllocableToClassACommonStockSubjectToPossibleRedemption_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_DenominatorWeightedAverageRedeemableClassACommonStockAbstract" xlink:href="nn-20210930.xsd#nn_DenominatorWeightedAverageRedeemableClassACommonStockAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_DenominatorWeightedAverageRedeemableClassACommonStockAbstract_lbl" xml:lang="en-US">Denominator: Weighted Average Redeemable Class A common stock</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_DenominatorWeightedAverageRedeemableClassACommonStockAbstract" xlink:to="nn_DenominatorWeightedAverageRedeemableClassACommonStockAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_RedeemableClassACommonStockBasicAndDilutedinShares" xlink:href="nn-20210930.xsd#nn_RedeemableClassACommonStockBasicAndDilutedinShares"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_RedeemableClassACommonStockBasicAndDilutedinShares_lbl" xml:lang="en-US">Redeemable Class A Common Stock, Basic and Diluted</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_RedeemableClassACommonStockBasicAndDilutedinShares" xlink:to="nn_RedeemableClassACommonStockBasicAndDilutedinShares_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_BasicAndDilutedNetIncomePerShareRedeemableClassACommonStock" xlink:href="nn-20210930.xsd#nn_BasicAndDilutedNetIncomePerShareRedeemableClassACommonStock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_BasicAndDilutedNetIncomePerShareRedeemableClassACommonStock_lbl" xml:lang="en-US">Basic and Diluted net income per share, Redeemable Class A Common Stock (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_BasicAndDilutedNetIncomePerShareRedeemableClassACommonStock" xlink:to="nn_BasicAndDilutedNetIncomePerShareRedeemableClassACommonStock_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_NonRedeemableCommonStockAbstract" xlink:href="nn-20210930.xsd#nn_NonRedeemableCommonStockAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_NonRedeemableCommonStockAbstract_lbl" xml:lang="en-US">Non-Redeemable Common Stock</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_NonRedeemableCommonStockAbstract" xlink:to="nn_NonRedeemableCommonStockAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_NumeratorNetIncomeMinusRedeemableNetEarningsAbstract" xlink:href="nn-20210930.xsd#nn_NumeratorNetIncomeMinusRedeemableNetEarningsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_NumeratorNetIncomeMinusRedeemableNetEarningsAbstract_lbl" xml:lang="en-US">Numerator: Net income minus redeemable net earnings</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_NumeratorNetIncomeMinusRedeemableNetEarningsAbstract" xlink:to="nn_NumeratorNetIncomeMinusRedeemableNetEarningsAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_RedeemableNetEarnings" xlink:href="nn-20210930.xsd#nn_RedeemableNetEarnings"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_RedeemableNetEarnings_lbl" xml:lang="en-US">Redeemable net earnings (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_RedeemableNetEarnings" xlink:to="nn_RedeemableNetEarnings_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="nn_RedeemableNetEarnings_lbl0" xml:lang="en-US">Redeemable Net Earnings (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_RedeemableNetEarnings" xlink:to="nn_RedeemableNetEarnings_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_NetIncomeLossAttributableToNonredeemableNoncontrollingInterest" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLossAttributableToNonredeemableNoncontrollingInterest"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NetIncomeLossAttributableToNonredeemableNoncontrollingInterest_lbl" xml:lang="en-US">Non-redeemable net income</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLossAttributableToNonredeemableNoncontrollingInterest" xlink:to="us-gaap_NetIncomeLossAttributableToNonredeemableNoncontrollingInterest_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_DenominatorWeightedAverageNonRedeemableCommonStockAbstract" xlink:href="nn-20210930.xsd#nn_DenominatorWeightedAverageNonRedeemableCommonStockAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_DenominatorWeightedAverageNonRedeemableCommonStockAbstract_lbl" xml:lang="en-US">Denominator: Weighted Average Non-Redeemable Common Stock</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_DenominatorWeightedAverageNonRedeemableCommonStockAbstract" xlink:to="nn_DenominatorWeightedAverageNonRedeemableCommonStockAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_BasicAndDilutedWeightedAverageSharesOutstandingCommonStockinShares" xlink:href="nn-20210930.xsd#nn_BasicAndDilutedWeightedAverageSharesOutstandingCommonStockinShares"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_BasicAndDilutedWeightedAverageSharesOutstandingCommonStockinShares_lbl" xml:lang="en-US">Basic and diluted weighted average shares outstanding, common stock (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_BasicAndDilutedWeightedAverageSharesOutstandingCommonStockinShares" xlink:to="nn_BasicAndDilutedWeightedAverageSharesOutstandingCommonStockinShares_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="nn_BasicAndDilutedWeightedAverageSharesOutstandingCommonStockinShares_lbl0" xml:lang="en-US">Basic and diluted weighted-average shares outstanding, common stock (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_BasicAndDilutedWeightedAverageSharesOutstandingCommonStockinShares" xlink:to="nn_BasicAndDilutedWeightedAverageSharesOutstandingCommonStockinShares_lbl0"/>
    <loc xlink:type="locator" xlink:label="nn_BasicAndDilutedNetLossPerShareCommonStockinDollarsPerShare" xlink:href="nn-20210930.xsd#nn_BasicAndDilutedNetLossPerShareCommonStockinDollarsPerShare"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_BasicAndDilutedNetLossPerShareCommonStockinDollarsPerShare_lbl" xml:lang="en-US">Basic and diluted net loss per share, common stock (in Dollars per share)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_BasicAndDilutedNetLossPerShareCommonStockinDollarsPerShare" xlink:to="nn_BasicAndDilutedNetLossPerShareCommonStockinDollarsPerShare_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_PrivatePlacementTextBlock" xlink:href="nn-20210930.xsd#nn_PrivatePlacementTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_PrivatePlacementTextBlock_lbl" xml:lang="en-US">Private Placement Warrants</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PrivatePlacementTextBlock" xlink:to="nn_PrivatePlacementTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_RelatedPartyTransactionsDisclosureTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RelatedPartyTransactionsDisclosureTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RelatedPartyTransactionsDisclosureTextBlock_lbl" xml:lang="en-US">Related Party Transactions</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionsDisclosureTextBlock" xlink:to="us-gaap_RelatedPartyTransactionsDisclosureTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_InvestmentTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InvestmentTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InvestmentTextBlock_lbl" xml:lang="en-US">Investment Held in Trust Account</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentTextBlock" xlink:to="us-gaap_InvestmentTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_MarketableSecuritiesTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MarketableSecuritiesTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MarketableSecuritiesTextBlock_lbl" xml:lang="en-US">Schedule of fair value held to maturities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MarketableSecuritiesTextBlock" xlink:to="us-gaap_MarketableSecuritiesTextBlock_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_MarketableSecuritiesTextBlock_lbl0" xml:lang="en-US">Schedule of fair value of held to maturity securities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MarketableSecuritiesTextBlock" xlink:to="us-gaap_MarketableSecuritiesTextBlock_lbl0"/>
    <loc xlink:type="locator" xlink:label="nn_CarryingValueAmortizedCost" xlink:href="nn-20210930.xsd#nn_CarryingValueAmortizedCost"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_CarryingValueAmortizedCost_lbl" xml:lang="en-US">Carrying Value/Amortized Cost</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CarryingValueAmortizedCost" xlink:to="nn_CarryingValueAmortizedCost_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_GrossUnrealizedGains" xlink:href="nn-20210930.xsd#nn_GrossUnrealizedGains"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_GrossUnrealizedGains_lbl" xml:lang="en-US">Gross Unrealized Gains</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_GrossUnrealizedGains" xlink:to="nn_GrossUnrealizedGains_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_GrossUnrealizedLosses" xlink:href="nn-20210930.xsd#nn_GrossUnrealizedLosses"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_GrossUnrealizedLosses_lbl" xml:lang="en-US">Gross Unrealized Losses</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_GrossUnrealizedLosses" xlink:to="nn_GrossUnrealizedLosses_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_AssetsHeldInTrust" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsHeldInTrust"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AssetsHeldInTrust_lbl" xml:lang="en-US">Total</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsHeldInTrust" xlink:to="us-gaap_AssetsHeldInTrust_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl" xml:lang="en-US">Commitments and Contingencies</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" xlink:to="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_StockholdersEquityNoteDisclosureTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquityNoteDisclosureTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockholdersEquityNoteDisclosureTextBlock_lbl" xml:lang="en-US">Stockholders&#8217; Equity</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityNoteDisclosureTextBlock" xlink:to="us-gaap_StockholdersEquityNoteDisclosureTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock_lbl" xml:lang="en-US">Restatement of Previously Issued Financial Statements</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock" xlink:to="us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="srt_ScheduleOfCondensedFinancialStatementsTableTextBlock" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ScheduleOfCondensedFinancialStatementsTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="srt_ScheduleOfCondensedFinancialStatementsTableTextBlock_lbl" xml:lang="en-US">Schedule of company&#8217;s previously reported financial statements</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ScheduleOfCondensedFinancialStatementsTableTextBlock" xlink:to="srt_ScheduleOfCondensedFinancialStatementsTableTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_BalanceSheetAsOfOctober192020AuditedAbstract" xlink:href="nn-20210930.xsd#nn_BalanceSheetAsOfOctober192020AuditedAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_BalanceSheetAsOfOctober192020AuditedAbstract_lbl" xml:lang="en-US">Balance sheet as of October 19, 2020 (audited)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_BalanceSheetAsOfOctober192020AuditedAbstract" xlink:to="nn_BalanceSheetAsOfOctober192020AuditedAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_BalanceSheetAsOfDecember312020AuditedAbstract" xlink:href="nn-20210930.xsd#nn_BalanceSheetAsOfDecember312020AuditedAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_BalanceSheetAsOfDecember312020AuditedAbstract_lbl" xml:lang="en-US">Balance sheet as of December 31, 2020 (audited)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_BalanceSheetAsOfDecember312020AuditedAbstract" xlink:to="nn_BalanceSheetAsOfDecember312020AuditedAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_StockholderEquity" xlink:href="nn-20210930.xsd#nn_StockholderEquity"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_StockholderEquity_lbl" xml:lang="en-US">Stockholders&#8217; equity</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StockholderEquity" xlink:to="nn_StockholderEquity_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_StatementOfOperationsForThePeriodFromAugust202020InceptionToDecember312020AuditedAbstract" xlink:href="nn-20210930.xsd#nn_StatementOfOperationsForThePeriodFromAugust202020InceptionToDecember312020AuditedAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_StatementOfOperationsForThePeriodFromAugust202020InceptionToDecember312020AuditedAbstract_lbl" xml:lang="en-US">Statement of operations for the period from August 20, 2020 (inception) to December 31, 2020 (audited)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StatementOfOperationsForThePeriodFromAugust202020InceptionToDecember312020AuditedAbstract" xlink:to="nn_StatementOfOperationsForThePeriodFromAugust202020InceptionToDecember312020AuditedAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_OperatingCostsAndExpenses" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingCostsAndExpenses"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OperatingCostsAndExpenses_lbl" xml:lang="en-US">Formation and operating costs</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingCostsAndExpenses" xlink:to="us-gaap_OperatingCostsAndExpenses_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_OperatingCostsAndExpenses_lbl0" xml:lang="en-US">Operations</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingCostsAndExpenses" xlink:to="us-gaap_OperatingCostsAndExpenses_lbl0"/>
    <loc xlink:type="locator" xlink:label="nn_ChangeInFairValueOfWarrantLiability" xlink:href="nn-20210930.xsd#nn_ChangeInFairValueOfWarrantLiability"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ChangeInFairValueOfWarrantLiability_lbl" xml:lang="en-US">Change in fair value of warrant liability</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ChangeInFairValueOfWarrantLiability" xlink:to="nn_ChangeInFairValueOfWarrantLiability_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_BasicAndDilutedWeightedAverageSharesOutstandingClassACommonSharesSubjectToPossi" xlink:href="nn-20210930.xsd#nn_BasicAndDilutedWeightedAverageSharesOutstandingClassACommonSharesSubjectToPossi"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_BasicAndDilutedWeightedAverageSharesOutstandingClassACommonSharesSubjectToPossi_lbl" xml:lang="en-US">Basic and diluted weighted-average shares outstanding, Class A common shares subject to possible redemption (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_BasicAndDilutedWeightedAverageSharesOutstandingClassACommonSharesSubjectToPossi" xlink:to="nn_BasicAndDilutedWeightedAverageSharesOutstandingClassACommonSharesSubjectToPossi_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_StatementOfChangesInStockholdersEquityForThePeriodFromAugust102020InceptionThroughDecember312020Abstract" xlink:href="nn-20210930.xsd#nn_StatementOfChangesInStockholdersEquityForThePeriodFromAugust102020InceptionThroughDecember312020Abstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_StatementOfChangesInStockholdersEquityForThePeriodFromAugust102020InceptionThroughDecember312020Abstract_lbl" xml:lang="en-US">Statement of changes in stockholders&#8217; equity for the period from August 10, 2020 (inception) through December 31, 2020</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StatementOfChangesInStockholdersEquityForThePeriodFromAugust102020InceptionThroughDecember312020Abstract" xlink:to="nn_StatementOfChangesInStockholdersEquityForThePeriodFromAugust102020InceptionThroughDecember312020Abstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_AdditionalPaidInCapitalCommonStock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdditionalPaidInCapitalCommonStock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AdditionalPaidInCapitalCommonStock_lbl" xml:lang="en-US">Additional paid-in-capital</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdditionalPaidInCapitalCommonStock" xlink:to="us-gaap_AdditionalPaidInCapitalCommonStock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_RetainedEarningsAppropriated" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetainedEarningsAppropriated"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RetainedEarningsAppropriated_lbl" xml:lang="en-US">Accumulated deficit</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RetainedEarningsAppropriated" xlink:to="us-gaap_RetainedEarningsAppropriated_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_StatementOfCashFlowsForThePeriodFromAugust102020InceptionToDecember312020Abstract" xlink:href="nn-20210930.xsd#nn_StatementOfCashFlowsForThePeriodFromAugust102020InceptionToDecember312020Abstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_StatementOfCashFlowsForThePeriodFromAugust102020InceptionToDecember312020Abstract_lbl" xml:lang="en-US">Statement of cash flows for the period from August 10, 2020 (inception) to December 31, 2020</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StatementOfCashFlowsForThePeriodFromAugust102020InceptionToDecember312020Abstract" xlink:to="nn_StatementOfCashFlowsForThePeriodFromAugust102020InceptionToDecember312020Abstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_NetIncomeLoss" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NetIncomeLoss_lbl" xml:lang="en-US">Net loss</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLoss" xlink:to="us-gaap_NetIncomeLoss_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_TransactionCostsAllocatedToWarrantLiability" xlink:href="nn-20210930.xsd#nn_TransactionCostsAllocatedToWarrantLiability"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_TransactionCostsAllocatedToWarrantLiability_lbl" xml:lang="en-US">Transaction costs allocated to warrant liability</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_TransactionCostsAllocatedToWarrantLiability" xlink:to="nn_TransactionCostsAllocatedToWarrantLiability_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_InitialClassificationOfWarrantLiability" xlink:href="nn-20210930.xsd#nn_InitialClassificationOfWarrantLiability"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_InitialClassificationOfWarrantLiability_lbl" xml:lang="en-US">Initial classification of warrant liability</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_InitialClassificationOfWarrantLiability" xlink:to="nn_InitialClassificationOfWarrantLiability_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_InitialValueOfCommonStockSubjectToPossibleRedemption" xlink:href="nn-20210930.xsd#nn_InitialValueOfCommonStockSubjectToPossibleRedemption"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_InitialValueOfCommonStockSubjectToPossibleRedemption_lbl" xml:lang="en-US">Initial value of Class A common stock subject to possible redemption</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_InitialValueOfCommonStockSubjectToPossibleRedemption" xlink:to="nn_InitialValueOfCommonStockSubjectToPossibleRedemption_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_USMoneyMarketHeldInTrustAccount" xlink:href="nn-20210930.xsd#nn_USMoneyMarketHeldInTrustAccount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_USMoneyMarketHeldInTrustAccount_lbl" xml:lang="en-US">U.S. Money Market held in trust Account</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_USMoneyMarketHeldInTrustAccount" xlink:to="nn_USMoneyMarketHeldInTrustAccount_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_USTreasurySecuritiesHeldInTrustAccount" xlink:href="nn-20210930.xsd#nn_USTreasurySecuritiesHeldInTrustAccount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_USTreasurySecuritiesHeldInTrustAccount_lbl" xml:lang="en-US">U.S. Treasury Securities held in Trust Account</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_USTreasurySecuritiesHeldInTrustAccount" xlink:to="nn_USTreasurySecuritiesHeldInTrustAccount_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_MarketableSecuritiesNoncurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MarketableSecuritiesNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MarketableSecuritiesNoncurrent_lbl" xml:lang="en-US">Cash and marketable securities held in Trust Account</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MarketableSecuritiesNoncurrent" xlink:to="us-gaap_MarketableSecuritiesNoncurrent_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings_lbl" xml:lang="en-US">Initial measurement on October 19, 2020</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings" xlink:to="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ServicingLiabilityAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ServicingLiabilityAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ServicingLiabilityAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions_lbl" xml:lang="en-US">Change in valuation inputs or other assumptions</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ServicingLiabilityAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions" xlink:to="us-gaap_ServicingLiabilityAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_CommonStockSubjectToPossibleRedemptionAbstract0" xlink:href="nn-20210930.xsd#nn_CommonStockSubjectToPossibleRedemptionAbstract0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_CommonStockSubjectToPossibleRedemptionAbstract0_lbl" xml:lang="en-US">Common stock subject to possible redemption</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonStockSubjectToPossibleRedemptionAbstract0" xlink:to="nn_CommonStockSubjectToPossibleRedemptionAbstract0_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_NumeratorNetIncomeAllocableToClassACommonStockSubjectToPossibleRedemptionAbstract" xlink:href="nn-20210930.xsd#nn_NumeratorNetIncomeAllocableToClassACommonStockSubjectToPossibleRedemptionAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_NumeratorNetIncomeAllocableToClassACommonStockSubjectToPossibleRedemptionAbstract_lbl" xml:lang="en-US">Numerator: Net income allocable to Class A common stock subject to possible redemption</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_NumeratorNetIncomeAllocableToClassACommonStockSubjectToPossibleRedemptionAbstract" xlink:to="nn_NumeratorNetIncomeAllocableToClassACommonStockSubjectToPossibleRedemptionAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_LessInterestAvailableToBeWithdrawnForPaymentOfTaxes" xlink:href="nn-20210930.xsd#nn_LessInterestAvailableToBeWithdrawnForPaymentOfTaxes"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_LessInterestAvailableToBeWithdrawnForPaymentOfTaxes_lbl" xml:lang="en-US">Less: interest available to be withdrawn for payment of taxes</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_LessInterestAvailableToBeWithdrawnForPaymentOfTaxes" xlink:to="nn_LessInterestAvailableToBeWithdrawnForPaymentOfTaxes_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="nn_LessInterestAvailableToBeWithdrawnForPaymentOfTaxes_lbl0" xml:lang="en-US">Less: interest available to be withdrawn for payment of taxes</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_LessInterestAvailableToBeWithdrawnForPaymentOfTaxes" xlink:to="nn_LessInterestAvailableToBeWithdrawnForPaymentOfTaxes_lbl0"/>
    <loc xlink:type="locator" xlink:label="nn_DenominatorWeightedAverageRedeemableClassACommonStockAbstract0" xlink:href="nn-20210930.xsd#nn_DenominatorWeightedAverageRedeemableClassACommonStockAbstract0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_DenominatorWeightedAverageRedeemableClassACommonStockAbstract0_lbl" xml:lang="en-US">Denominator: Weighted-Average Redeemable Class A common stock</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_DenominatorWeightedAverageRedeemableClassACommonStockAbstract0" xlink:to="nn_DenominatorWeightedAverageRedeemableClassACommonStockAbstract0_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_BasicAndDilutedNetIncomePerShareRedeemableClassACommonStockinPerShare" xlink:href="nn-20210930.xsd#nn_BasicAndDilutedNetIncomePerShareRedeemableClassACommonStockinPerShare"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_BasicAndDilutedNetIncomePerShareRedeemableClassACommonStockinPerShare_lbl" xml:lang="en-US">Basic and Diluted net income per share, Redeemable Class A Common Stock (in Dollars per share)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_BasicAndDilutedNetIncomePerShareRedeemableClassACommonStockinPerShare" xlink:to="nn_BasicAndDilutedNetIncomePerShareRedeemableClassACommonStockinPerShare_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_NonRedeemableCommonStockAbstract0" xlink:href="nn-20210930.xsd#nn_NonRedeemableCommonStockAbstract0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_NonRedeemableCommonStockAbstract0_lbl" xml:lang="en-US">Non-Redeemable Common Stock</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_NonRedeemableCommonStockAbstract0" xlink:to="nn_NonRedeemableCommonStockAbstract0_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_NumeratorNetIncomeMinusRedeemableNetEarningsAbstract0" xlink:href="nn-20210930.xsd#nn_NumeratorNetIncomeMinusRedeemableNetEarningsAbstract0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_NumeratorNetIncomeMinusRedeemableNetEarningsAbstract0_lbl" xml:lang="en-US">Numerator: Net Income minus Redeemable Net Earnings</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_NumeratorNetIncomeMinusRedeemableNetEarningsAbstract0" xlink:to="nn_NumeratorNetIncomeMinusRedeemableNetEarningsAbstract0_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest_lbl" xml:lang="en-US">Net Loss</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest" xlink:to="us-gaap_NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest_lbl0" xml:lang="en-US">Non-Redeemable Net Loss</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest" xlink:to="us-gaap_NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest_lbl1" xml:lang="en-US">Net loss</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest" xlink:to="us-gaap_NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest_lbl1"/>
    <loc xlink:type="locator" xlink:label="nn_DenominatorWeightedAverageNonRedeemableCommonStockAbstract0" xlink:href="nn-20210930.xsd#nn_DenominatorWeightedAverageNonRedeemableCommonStockAbstract0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_DenominatorWeightedAverageNonRedeemableCommonStockAbstract0_lbl" xml:lang="en-US">Denominator: Weighted-Average Non-Redeemable Common Stock</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_DenominatorWeightedAverageNonRedeemableCommonStockAbstract0" xlink:to="nn_DenominatorWeightedAverageNonRedeemableCommonStockAbstract0_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_IncomeTaxDisclosureTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeTaxDisclosureTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncomeTaxDisclosureTextBlock_lbl" xml:lang="en-US">Income Tax</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxDisclosureTextBlock" xlink:to="us-gaap_IncomeTaxDisclosureTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_lbl" xml:lang="en-US">Schedule of net deferred tax assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock" xlink:to="us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_lbl0" xml:lang="en-US">Schedule of consolidated temporary differences comprised of net deferred tax assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock" xlink:to="us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_lbl0"/>
    <loc xlink:type="locator" xlink:label="nn_DeferredTaxAssetAbstract" xlink:href="nn-20210930.xsd#nn_DeferredTaxAssetAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_DeferredTaxAssetAbstract_lbl" xml:lang="en-US">Deferred tax asset</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_DeferredTaxAssetAbstract" xlink:to="nn_DeferredTaxAssetAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_DeferredCostsAndOtherAssets" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredCostsAndOtherAssets"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DeferredCostsAndOtherAssets_lbl" xml:lang="en-US">Organizational costs and startup expenses</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredCostsAndOtherAssets" xlink:to="us-gaap_DeferredCostsAndOtherAssets_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_OperatingLossCarryforwards" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLossCarryforwards"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OperatingLossCarryforwards_lbl" xml:lang="en-US">Federal net operating loss</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLossCarryforwards" xlink:to="us-gaap_OperatingLossCarryforwards_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_DeferredTaxAssetsNet" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredTaxAssetsNet"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DeferredTaxAssetsNet_lbl" xml:lang="en-US">Deferred tax asset, net of allowance</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsNet" xlink:to="us-gaap_DeferredTaxAssetsNet_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock_lbl" xml:lang="en-US">Schedule of income tax provision</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock" xlink:to="us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_FederalAbstract" xlink:href="nn-20210930.xsd#nn_FederalAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_FederalAbstract_lbl" xml:lang="en-US">Federal</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FederalAbstract" xlink:to="nn_FederalAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_CurrentFederalTaxExpenseBenefit" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CurrentFederalTaxExpenseBenefit"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CurrentFederalTaxExpenseBenefit_lbl" xml:lang="en-US">Current</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CurrentFederalTaxExpenseBenefit" xlink:to="us-gaap_CurrentFederalTaxExpenseBenefit_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_DeferredFederalIncomeTaxExpenseBenefit" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredFederalIncomeTaxExpenseBenefit"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DeferredFederalIncomeTaxExpenseBenefit_lbl" xml:lang="en-US">Deferred</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredFederalIncomeTaxExpenseBenefit" xlink:to="us-gaap_DeferredFederalIncomeTaxExpenseBenefit_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_StateAbstract" xlink:href="nn-20210930.xsd#nn_StateAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_StateAbstract_lbl" xml:lang="en-US">State</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StateAbstract" xlink:to="nn_StateAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_CurrentStateAndLocalTaxExpenseBenefit" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CurrentStateAndLocalTaxExpenseBenefit"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CurrentStateAndLocalTaxExpenseBenefit_lbl" xml:lang="en-US">Current</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CurrentStateAndLocalTaxExpenseBenefit" xlink:to="us-gaap_CurrentStateAndLocalTaxExpenseBenefit_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_lbl" xml:lang="en-US">Deferred</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit" xlink:to="us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_lbl" xml:lang="en-US">Change in valuation allowance</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance" xlink:to="us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_lbl" xml:lang="en-US">Schedule of a reconciliation of the federal income tax rate</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock" xlink:to="us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_lbl" xml:lang="en-US">Statutory federal income tax rate</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:to="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_lbl" xml:lang="en-US">State taxes, net of federal tax benefit</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes" xlink:to="us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_lbl" xml:lang="en-US">Change in fair value of warrant liability</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments" xlink:to="us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_EffectiveIncomeTaxRateReconciliationFormationAndOperatingCostsPercent" xlink:href="nn-20210930.xsd#nn_EffectiveIncomeTaxRateReconciliationFormationAndOperatingCostsPercent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_EffectiveIncomeTaxRateReconciliationFormationAndOperatingCostsPercent_lbl" xml:lang="en-US">Formation and operating costs</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_EffectiveIncomeTaxRateReconciliationFormationAndOperatingCostsPercent" xlink:to="nn_EffectiveIncomeTaxRateReconciliationFormationAndOperatingCostsPercent_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperations_lbl" xml:lang="en-US">Income tax provision</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:to="us-gaap_EffectiveIncomeTaxRateContinuingOperations_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ScheduleOfWeightedAverageNumberOfSharesTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfWeightedAverageNumberOfSharesTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfWeightedAverageNumberOfSharesTableTextBlock_lbl" xml:lang="en-US">Schedule of the diluted weighted average shares</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfWeightedAverageNumberOfSharesTableTextBlock" xlink:to="us-gaap_ScheduleOfWeightedAverageNumberOfSharesTableTextBlock_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ScheduleOfWeightedAverageNumberOfSharesTableTextBlock_lbl0" xml:lang="en-US">Schedule of determination of the diluted weighted average shares</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfWeightedAverageNumberOfSharesTableTextBlock" xlink:to="us-gaap_ScheduleOfWeightedAverageNumberOfSharesTableTextBlock_lbl0"/>
    <loc xlink:type="locator" xlink:label="nn_NumeratorAbstract" xlink:href="nn-20210930.xsd#nn_NumeratorAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_NumeratorAbstract_lbl" xml:lang="en-US">Numerator</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_NumeratorAbstract" xlink:to="nn_NumeratorAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_NetIncomeLosses" xlink:href="nn-20210930.xsd#nn_NetIncomeLosses"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_NetIncomeLosses_lbl" xml:lang="en-US">Net Loss</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_NetIncomeLosses" xlink:to="nn_NetIncomeLosses_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment_lbl" xml:lang="en-US">Less: Change in redemption value of preferred interests</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment" xlink:to="us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_NetLossAttributableToCommonUnitholders" xlink:href="nn-20210930.xsd#nn_NetLossAttributableToCommonUnitholders"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_NetLossAttributableToCommonUnitholders_lbl" xml:lang="en-US">Net Loss attributable to common unitholders</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_NetLossAttributableToCommonUnitholders" xlink:to="nn_NetLossAttributableToCommonUnitholders_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_DenominatorAbstract" xlink:href="nn-20210930.xsd#nn_DenominatorAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_DenominatorAbstract_lbl" xml:lang="en-US">Denominator</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_DenominatorAbstract" xlink:to="nn_DenominatorAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock_lbl" xml:lang="en-US">Schedule of anti-dilutive unvested restricted units, as well as the anti-dilutive effects</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock" xlink:to="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_AdjustmentOfWarrantsGrantedForServices" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdjustmentOfWarrantsGrantedForServices"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AdjustmentOfWarrantsGrantedForServices_lbl" xml:lang="en-US">Warrants</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdjustmentOfWarrantsGrantedForServices" xlink:to="us-gaap_AdjustmentOfWarrantsGrantedForServices_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_StockOptionPlanExpense" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockOptionPlanExpense"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockOptionPlanExpense_lbl" xml:lang="en-US">Options</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockOptionPlanExpense" xlink:to="us-gaap_StockOptionPlanExpense_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_RestrictedStockExpense" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestrictedStockExpense"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RestrictedStockExpense_lbl" xml:lang="en-US">Restricted Stock Units</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestrictedStockExpense" xlink:to="us-gaap_RestrictedStockExpense_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_PreferredUnits" xlink:href="nn-20210930.xsd#nn_PreferredUnits"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_PreferredUnits_lbl" xml:lang="en-US">Preferred Units</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PreferredUnits" xlink:to="nn_PreferredUnits_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_DebtDisclosureTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtDisclosureTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtDisclosureTextBlock_lbl" xml:lang="en-US">Debt</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtDisclosureTextBlock" xlink:to="us-gaap_DebtDisclosureTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ScheduleOfDebtTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfDebtTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfDebtTableTextBlock_lbl" xml:lang="en-US">Schedule of debt consists</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfDebtTableTextBlock" xlink:to="us-gaap_ScheduleOfDebtTableTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_SeniorSecuredLoanPrincipal" xlink:href="nn-20210930.xsd#nn_SeniorSecuredLoanPrincipal"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_SeniorSecuredLoanPrincipal_lbl" xml:lang="en-US">Senior secured loan, principal</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SeniorSecuredLoanPrincipal" xlink:to="nn_SeniorSecuredLoanPrincipal_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_SeniorSecuredLoanPaidinkindInterest" xlink:href="nn-20210930.xsd#nn_SeniorSecuredLoanPaidinkindInterest"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_SeniorSecuredLoanPaidinkindInterest_lbl" xml:lang="en-US">Senior secured loan, paid-in-kind interest</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SeniorSecuredLoanPaidinkindInterest" xlink:to="nn_SeniorSecuredLoanPaidinkindInterest_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_lbl" xml:lang="en-US">Less unamortized discount and debt issuance costs</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet" xlink:to="us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_SeniorNotes" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SeniorNotes"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SeniorNotes_lbl" xml:lang="en-US">Total Senior secured loan</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SeniorNotes" xlink:to="us-gaap_SeniorNotes_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_WarrantsAndWarrantLiabilityTextBlock" xlink:href="nn-20210930.xsd#nn_WarrantsAndWarrantLiabilityTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_WarrantsAndWarrantLiabilityTextBlock_lbl" xml:lang="en-US">Warrants and Warrant Liability</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WarrantsAndWarrantLiabilityTextBlock" xlink:to="nn_WarrantsAndWarrantLiabilityTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_FairValueDisclosuresTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueDisclosuresTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueDisclosuresTextBlock_lbl" xml:lang="en-US">Fair Value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueDisclosuresTextBlock" xlink:to="us-gaap_FairValueDisclosuresTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock_lbl" xml:lang="en-US">Schedule of financial assets and liabilities measured at fair value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock" xlink:to="us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_June302021Abstract" xlink:href="nn-20210930.xsd#nn_June302021Abstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_June302021Abstract_lbl" xml:lang="en-US">June 30, 2021</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_June302021Abstract" xlink:to="nn_June302021Abstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_FairValueWarrants" xlink:href="nn-20210930.xsd#nn_FairValueWarrants"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_FairValueWarrants_lbl" xml:lang="en-US">Warrants</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FairValueWarrants" xlink:to="nn_FairValueWarrants_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_December312020Abstract" xlink:href="nn-20210930.xsd#nn_December312020Abstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_December312020Abstract_lbl" xml:lang="en-US">December 31, 2020</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_December312020Abstract" xlink:to="nn_December312020Abstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock_lbl" xml:lang="en-US">Schedule of fair value warrants estimated using the Black-Scholes option-pricing model</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock" xlink:to="us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_FairValueDiscountForLackOfMarketability" xlink:href="nn-20210930.xsd#nn_FairValueDiscountForLackOfMarketability"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_FairValueDiscountForLackOfMarketability_lbl" xml:lang="en-US">Discount for lack of marketability</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FairValueDiscountForLackOfMarketability" xlink:to="nn_FairValueDiscountForLackOfMarketability_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="nn_FairValueDiscountForLackOfMarketability_lbl0" xml:lang="en-US">Discount for Lack of Marketability</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FairValueDiscountForLackOfMarketability" xlink:to="nn_FairValueDiscountForLackOfMarketability_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_EquityFairValueAdjustment" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityFairValueAdjustment"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EquityFairValueAdjustment_lbl" xml:lang="en-US">Equity value (in Dollars)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityFairValueAdjustment" xlink:to="us-gaap_EquityFairValueAdjustment_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_EquityFairValueAdjustment_lbl0" xml:lang="en-US">Equity Value (in Dollars)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityFairValueAdjustment" xlink:to="us-gaap_EquityFairValueAdjustment_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:label="us-gaap_EquityFairValueAdjustment_lbl1" xml:lang="en-US">Equity value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityFairValueAdjustment" xlink:to="us-gaap_EquityFairValueAdjustment_lbl1"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionValuationMethodExpectedDividendRate" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionValuationMethodExpectedDividendRate"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionValuationMethodExpectedDividendRate_lbl" xml:lang="en-US">Dividend rate</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionValuationMethodExpectedDividendRate" xlink:to="us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionValuationMethodExpectedDividendRate_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_lbl" xml:lang="en-US">Schedule of beginning and ending balances for the liabilities measured at fair value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock" xlink:to="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_lbl0" xml:lang="en-US">Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock" xlink:to="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_lbl0"/>
    <loc xlink:type="locator" xlink:label="nn_FairValueOfVestingOfVendorWarrants" xlink:href="nn-20210930.xsd#nn_FairValueOfVestingOfVendorWarrants"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_FairValueOfVestingOfVendorWarrants_lbl" xml:lang="en-US">Vesting of Vendor Warrants</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FairValueOfVestingOfVendorWarrants" xlink:to="nn_FairValueOfVestingOfVendorWarrants_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_FairValueAdjustmentForVendorWarrants" xlink:href="nn-20210930.xsd#nn_FairValueAdjustmentForVendorWarrants"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_FairValueAdjustmentForVendorWarrants_lbl" xml:lang="en-US">Fair value adjustment for Vendor Warrants</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FairValueAdjustmentForVendorWarrants" xlink:to="nn_FairValueAdjustmentForVendorWarrants_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_FairValueAdjustmentForFinancingWarrants" xlink:href="nn-20210930.xsd#nn_FairValueAdjustmentForFinancingWarrants"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_FairValueAdjustmentForFinancingWarrants_lbl" xml:lang="en-US">Fair value adjustment for Financing Warrants</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FairValueAdjustmentForFinancingWarrants" xlink:to="nn_FairValueAdjustmentForFinancingWarrants_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_CommonUnitsAndConvertiblePreferredUnitsTextBlock" xlink:href="nn-20210930.xsd#nn_CommonUnitsAndConvertiblePreferredUnitsTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_CommonUnitsAndConvertiblePreferredUnitsTextBlock_lbl" xml:lang="en-US">Common Units and Convertible Preferred Units</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonUnitsAndConvertiblePreferredUnitsTextBlock" xlink:to="nn_CommonUnitsAndConvertiblePreferredUnitsTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_OtherCurrentAssetsTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherCurrentAssetsTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherCurrentAssetsTextBlock_lbl" xml:lang="en-US">Other current assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherCurrentAssetsTextBlock" xlink:to="us-gaap_OtherCurrentAssetsTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ScheduleOfOtherCurrentAssetsTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfOtherCurrentAssetsTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfOtherCurrentAssetsTableTextBlock_lbl" xml:lang="en-US">Schedule of other current assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfOtherCurrentAssetsTableTextBlock" xlink:to="us-gaap_ScheduleOfOtherCurrentAssetsTableTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_PrepaidRent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PrepaidRent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PrepaidRent_lbl" xml:lang="en-US">Prepaid rent</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PrepaidRent" xlink:to="us-gaap_PrepaidRent_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_DeferredOfferingCosts" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredOfferingCosts"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DeferredOfferingCosts_lbl" xml:lang="en-US">Deferred transaction costs</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredOfferingCosts" xlink:to="us-gaap_DeferredOfferingCosts_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DeferredOfferingCosts_lbl0" xml:lang="en-US">Offering costs</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredOfferingCosts" xlink:to="us-gaap_DeferredOfferingCosts_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_OtherAssetsNoncurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherAssetsNoncurrent_lbl" xml:lang="en-US">Other</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAssetsNoncurrent" xlink:to="us-gaap_OtherAssetsNoncurrent_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_LossContingencyDisclosures" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LossContingencyDisclosures"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LossContingencyDisclosures_lbl" xml:lang="en-US">Contingencies</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LossContingencyDisclosures" xlink:to="us-gaap_LossContingencyDisclosures_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ScheduleOfAssetRetirementObligationsTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfAssetRetirementObligationsTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfAssetRetirementObligationsTableTextBlock_lbl" xml:lang="en-US">Schedule of asset retirement obligations</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfAssetRetirementObligationsTableTextBlock" xlink:to="us-gaap_ScheduleOfAssetRetirementObligationsTableTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_AssetRetirementObligationLiabilitiesIncurred" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetRetirementObligationLiabilitiesIncurred"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AssetRetirementObligationLiabilitiesIncurred_lbl" xml:lang="en-US">Liabilities incurred</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetRetirementObligationLiabilitiesIncurred" xlink:to="us-gaap_AssetRetirementObligationLiabilitiesIncurred_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfDepreciationIsComputedStraightlineMethodTableTextBlock" xlink:href="nn-20210930.xsd#nn_ScheduleOfDepreciationIsComputedStraightlineMethodTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ScheduleOfDepreciationIsComputedStraightlineMethodTableTextBlock_lbl" xml:lang="en-US">Schedule of depreciation is computed using the straight-line method</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfDepreciationIsComputedStraightlineMethodTableTextBlock" xlink:to="nn_ScheduleOfDepreciationIsComputedStraightlineMethodTableTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FiniteLivedIntangibleAssetUsefulLife_lbl" xml:lang="en-US">Network under construction</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:to="us-gaap_FiniteLivedIntangibleAssetUsefulLife_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_FiniteLivedIntangibleAssetUsefulLife_lbl0" xml:lang="en-US">Useful life</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:to="us-gaap_FiniteLivedIntangibleAssetUsefulLife_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_lbl" xml:lang="en-US">Office equipment and furniture</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife" xlink:to="us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ImpairedIntangibleAssetFactsAndCircumstancesLeadingToImpairment" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ImpairedIntangibleAssetFactsAndCircumstancesLeadingToImpairment"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ImpairedIntangibleAssetFactsAndCircumstancesLeadingToImpairment_lbl" xml:lang="en-US">Leasehold improvements</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ImpairedIntangibleAssetFactsAndCircumstancesLeadingToImpairment" xlink:to="us-gaap_ImpairedIntangibleAssetFactsAndCircumstancesLeadingToImpairment_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ScheduleOfRevenueByMajorCustomersByReportingSegmentsTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfRevenueByMajorCustomersByReportingSegmentsTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfRevenueByMajorCustomersByReportingSegmentsTableTextBlock_lbl" xml:lang="en-US">Schedule of company&#8217;s revenue disaggregated by category and source</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfRevenueByMajorCustomersByReportingSegmentsTableTextBlock" xlink:to="us-gaap_ScheduleOfRevenueByMajorCustomersByReportingSegmentsTableTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl" xml:lang="en-US">Government contracts</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:to="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_lbl" xml:lang="en-US">Equipment sales</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment" xlink:to="us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_AccruedLiabilitiesAndOtherLiabilities" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccruedLiabilitiesAndOtherLiabilities"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AccruedLiabilitiesAndOtherLiabilities_lbl" xml:lang="en-US">Other</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccruedLiabilitiesAndOtherLiabilities" xlink:to="us-gaap_AccruedLiabilitiesAndOtherLiabilities_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_RevenuesNetOfInterestExpense" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenuesNetOfInterestExpense"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RevenuesNetOfInterestExpense_lbl" xml:lang="en-US">Total revenue</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevenuesNetOfInterestExpense" xlink:to="us-gaap_RevenuesNetOfInterestExpense_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_NumeratorAbstract0" xlink:href="nn-20210930.xsd#nn_NumeratorAbstract0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_NumeratorAbstract0_lbl" xml:lang="en-US">Numerator</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_NumeratorAbstract0" xlink:to="nn_NumeratorAbstract0_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_NetLosses" xlink:href="nn-20210930.xsd#nn_NetLosses"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_NetLosses_lbl" xml:lang="en-US">Net loss</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_NetLosses" xlink:to="nn_NetLosses_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_TemporaryEquityAccretionToRedemptionValue" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TemporaryEquityAccretionToRedemptionValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_TemporaryEquityAccretionToRedemptionValue_lbl" xml:lang="en-US">Less cumulative change in redemption value of temporary equity</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TemporaryEquityAccretionToRedemptionValue" xlink:to="us-gaap_TemporaryEquityAccretionToRedemptionValue_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_TemporaryEquityAccretionToRedemptionValue_lbl0" xml:lang="en-US">Redemption value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TemporaryEquityAccretionToRedemptionValue" xlink:to="us-gaap_TemporaryEquityAccretionToRedemptionValue_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_NetIncomeLossFromDiscontinuedOperationsAvailableToCommonShareholdersBasic" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLossFromDiscontinuedOperationsAvailableToCommonShareholdersBasic"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NetIncomeLossFromDiscontinuedOperationsAvailableToCommonShareholdersBasic_lbl" xml:lang="en-US">Net loss attributable to common unitholders</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLossFromDiscontinuedOperationsAvailableToCommonShareholdersBasic" xlink:to="us-gaap_NetIncomeLossFromDiscontinuedOperationsAvailableToCommonShareholdersBasic_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_DenominatorAbstract0" xlink:href="nn-20210930.xsd#nn_DenominatorAbstract0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_DenominatorAbstract0_lbl" xml:lang="en-US">Denominator</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_DenominatorAbstract0" xlink:to="nn_DenominatorAbstract0_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_WeightedAverageUnitsBasicAndDilutedinShares" xlink:href="nn-20210930.xsd#nn_WeightedAverageUnitsBasicAndDilutedinShares"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_WeightedAverageUnitsBasicAndDilutedinShares_lbl" xml:lang="en-US">Weighted average units &#8211; basic and diluted (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WeightedAverageUnitsBasicAndDilutedinShares" xlink:to="nn_WeightedAverageUnitsBasicAndDilutedinShares_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_BasicAndDilutedLossPerUnit" xlink:href="nn-20210930.xsd#nn_BasicAndDilutedLossPerUnit"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_BasicAndDilutedLossPerUnit_lbl" xml:lang="en-US">Basic and diluted loss per unit (in Dollars per share)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_BasicAndDilutedLossPerUnit" xlink:to="nn_BasicAndDilutedLossPerUnit_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ClassOfWarrantsOrRightOutstanding" xlink:href="nn-20210930.xsd#nn_ClassOfWarrantsOrRightOutstanding"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ClassOfWarrantsOrRightOutstanding_lbl" xml:lang="en-US">Warrants</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ClassOfWarrantsOrRightOutstanding" xlink:to="nn_ClassOfWarrantsOrRightOutstanding_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares_lbl" xml:lang="en-US">Options</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_lbl" xml:lang="en-US">Restricted stock units</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures" xlink:to="us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_PreferredUnit" xlink:href="nn-20210930.xsd#nn_PreferredUnit"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_PreferredUnit_lbl" xml:lang="en-US">Preferred units</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PreferredUnit" xlink:to="nn_PreferredUnit_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ATTAgreementTextBlock" xlink:href="nn-20210930.xsd#nn_ATTAgreementTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ATTAgreementTextBlock_lbl" xml:lang="en-US">AT&amp;T Agreement</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ATTAgreementTextBlock" xlink:to="nn_ATTAgreementTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock_lbl" xml:lang="en-US">Shedule of Black-Scholes option-pricing mode</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionValuationMethodRiskFreeInterestRate" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionValuationMethodRiskFreeInterestRate"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionValuationMethodRiskFreeInterestRate_lbl" xml:lang="en-US">Risk-Free Rate</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionValuationMethodRiskFreeInterestRate" xlink:to="us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionValuationMethodRiskFreeInterestRate_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_DiscountForLacksOfMarketability" xlink:href="nn-20210930.xsd#nn_DiscountForLacksOfMarketability"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_DiscountForLacksOfMarketability_lbl" xml:lang="en-US">Discount for Lack of Marketability</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_DiscountForLacksOfMarketability" xlink:to="nn_DiscountForLacksOfMarketability_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_lbl" xml:lang="en-US">Property, Equipment, Network Under Construction, and Software</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock" xlink:to="us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PropertyPlantAndEquipmentTextBlock_lbl" xml:lang="en-US">Schedule of property and equipment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentTextBlock" xlink:to="us-gaap_PropertyPlantAndEquipmentTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentGross" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xml:lang="en-US">Property and equipment, net</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentGross" xlink:to="us-gaap_PropertyPlantAndEquipmentGross_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock_lbl" xml:lang="en-US">Schedule of capitalized software and expected amortization</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock" xlink:to="us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_CapitalizedComputerSoftwareGross" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CapitalizedComputerSoftwareGross"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CapitalizedComputerSoftwareGross_lbl" xml:lang="en-US">Software</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalizedComputerSoftwareGross" xlink:to="us-gaap_CapitalizedComputerSoftwareGross_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_lbl" xml:lang="en-US">Accumulated Amortization</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_OtherIntangibleAssetsNet" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherIntangibleAssetsNet"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherIntangibleAssetsNet_lbl" xml:lang="en-US">Software Intangible, net</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherIntangibleAssetsNet" xlink:to="us-gaap_OtherIntangibleAssetsNet_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_OtherIntangibleAssetsNet_lbl0" xml:lang="en-US">Net tangible assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherIntangibleAssetsNet" xlink:to="us-gaap_OtherIntangibleAssetsNet_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_lbl" xml:lang="en-US">Schedule of Future amortization</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock" xlink:to="us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_FutureAmortizationIsExpectedAsFollowsAbstract" xlink:href="nn-20210930.xsd#nn_FutureAmortizationIsExpectedAsFollowsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_FutureAmortizationIsExpectedAsFollowsAbstract_lbl" xml:lang="en-US">Future amortization is expected as follows:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FutureAmortizationIsExpectedAsFollowsAbstract" xlink:to="nn_FutureAmortizationIsExpectedAsFollowsAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_PresentValueOfFutureInsuranceProfitsAmortizationExpenseYearOne" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PresentValueOfFutureInsuranceProfitsAmortizationExpenseYearOne"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PresentValueOfFutureInsuranceProfitsAmortizationExpenseYearOne_lbl" xml:lang="en-US">For the twelve months ending December 31, 2021</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PresentValueOfFutureInsuranceProfitsAmortizationExpenseYearOne" xlink:to="us-gaap_PresentValueOfFutureInsuranceProfitsAmortizationExpenseYearOne_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_PresentValueOfFutureInsuranceProfitsAmortizationExpenseYearTwo" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PresentValueOfFutureInsuranceProfitsAmortizationExpenseYearTwo"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PresentValueOfFutureInsuranceProfitsAmortizationExpenseYearTwo_lbl" xml:lang="en-US">For the twelve months ending December 31, 2022</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PresentValueOfFutureInsuranceProfitsAmortizationExpenseYearTwo" xlink:to="us-gaap_PresentValueOfFutureInsuranceProfitsAmortizationExpenseYearTwo_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_PresentValueOfFutureInsuranceProfitsAmortizationExpenseYearThree" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PresentValueOfFutureInsuranceProfitsAmortizationExpenseYearThree"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PresentValueOfFutureInsuranceProfitsAmortizationExpenseYearThree_lbl" xml:lang="en-US">For the twelve months ending December 31, 2023</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PresentValueOfFutureInsuranceProfitsAmortizationExpenseYearThree" xlink:to="us-gaap_PresentValueOfFutureInsuranceProfitsAmortizationExpenseYearThree_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock_lbl" xml:lang="en-US">Accrued Liabilities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock" xlink:to="us-gaap_AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ScheduleOfAccountsPayableAndAccruedLiabilitiesTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfAccountsPayableAndAccruedLiabilitiesTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfAccountsPayableAndAccruedLiabilitiesTableTextBlock_lbl" xml:lang="en-US">Schedule of accrued liabilities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfAccountsPayableAndAccruedLiabilitiesTableTextBlock" xlink:to="us-gaap_ScheduleOfAccountsPayableAndAccruedLiabilitiesTableTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_AccruedBonusesCurrentAndNoncurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccruedBonusesCurrentAndNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AccruedBonusesCurrentAndNoncurrent_lbl" xml:lang="en-US">Accrued bonus</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccruedBonusesCurrentAndNoncurrent" xlink:to="us-gaap_AccruedBonusesCurrentAndNoncurrent_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_AccruedSalaryAndOtherEmployeeLiabilities" xlink:href="nn-20210930.xsd#nn_AccruedSalaryAndOtherEmployeeLiabilities"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_AccruedSalaryAndOtherEmployeeLiabilities_lbl" xml:lang="en-US">Accrued salary and other employee liabilities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_AccruedSalaryAndOtherEmployeeLiabilities" xlink:to="nn_AccruedSalaryAndOtherEmployeeLiabilities_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_lbl" xml:lang="en-US">Accrued accounts payable</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent" xlink:to="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_AccruedCashInterestAndUnfundedFees" xlink:href="nn-20210930.xsd#nn_AccruedCashInterestAndUnfundedFees"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_AccruedCashInterestAndUnfundedFees_lbl" xml:lang="en-US">Accrued cash interest and unfunded fees</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_AccruedCashInterestAndUnfundedFees" xlink:to="nn_AccruedCashInterestAndUnfundedFees_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherAccruedLiabilitiesCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrent_lbl" xml:lang="en-US">Other accrued liabilities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAccruedLiabilitiesCurrent" xlink:to="us-gaap_OtherAccruedLiabilitiesCurrent_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrentAndNoncurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherAccruedLiabilitiesCurrentAndNoncurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrentAndNoncurrent_lbl" xml:lang="en-US">Total accrued liabilities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAccruedLiabilitiesCurrentAndNoncurrent" xlink:to="us-gaap_OtherAccruedLiabilitiesCurrentAndNoncurrent_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_December312020Abstract0" xlink:href="nn-20210930.xsd#nn_December312020Abstract0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_December312020Abstract0_lbl" xml:lang="en-US">December 31, 2020</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_December312020Abstract0" xlink:to="nn_December312020Abstract0_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_December312019Abstract" xlink:href="nn-20210930.xsd#nn_December312019Abstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_December312019Abstract_lbl" xml:lang="en-US">December 31, 2019</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_December312019Abstract" xlink:to="nn_December312019Abstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_WarrantsAbstract" xlink:href="nn-20210930.xsd#nn_WarrantsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_WarrantsAbstract_lbl" xml:lang="en-US">Warrants:</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WarrantsAbstract" xlink:to="nn_WarrantsAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_FairValueIssuanceOfWarrantInConnectionWithFortressFinancingAgreement" xlink:href="nn-20210930.xsd#nn_FairValueIssuanceOfWarrantInConnectionWithFortressFinancingAgreement"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_FairValueIssuanceOfWarrantInConnectionWithFortressFinancingAgreement_lbl" xml:lang="en-US">Issuance of warrants in connection with Fortress Financing Agreement</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FairValueIssuanceOfWarrantInConnectionWithFortressFinancingAgreement" xlink:to="nn_FairValueIssuanceOfWarrantInConnectionWithFortressFinancingAgreement_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_LiabilitiesFairValueAdjustment" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesFairValueAdjustment"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LiabilitiesFairValueAdjustment_lbl" xml:lang="en-US">Fair value adjustment of outstanding warrants</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesFairValueAdjustment" xlink:to="us-gaap_LiabilitiesFairValueAdjustment_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_lbl" xml:lang="en-US">Equity-Based Compensation</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock" xlink:to="us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_FairValueOptionQuantitativeDisclosuresTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueOptionQuantitativeDisclosuresTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueOptionQuantitativeDisclosuresTextBlock_lbl" xml:lang="en-US">Schedule of fair value of unit options issued</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueOptionQuantitativeDisclosuresTextBlock" xlink:to="us-gaap_FairValueOptionQuantitativeDisclosuresTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ExpectedVolatilities" xlink:href="nn-20210930.xsd#nn_ExpectedVolatilities"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ExpectedVolatilities_lbl" xml:lang="en-US">Expected volatility</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ExpectedVolatilities" xlink:to="nn_ExpectedVolatilities_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ExpectedTermyears" xlink:href="nn-20210930.xsd#nn_ExpectedTermyears"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ExpectedTermyears_lbl" xml:lang="en-US">Expected term (years)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ExpectedTermyears" xlink:to="nn_ExpectedTermyears_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ExpectedDividends" xlink:href="nn-20210930.xsd#nn_ExpectedDividends"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ExpectedDividends_lbl" xml:lang="en-US">Expected dividends</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ExpectedDividends" xlink:to="nn_ExpectedDividends_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_RiskfreeRate" xlink:href="nn-20210930.xsd#nn_RiskfreeRate"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_RiskfreeRate_lbl" xml:lang="en-US">Risk-free rate</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_RiskfreeRate" xlink:to="nn_RiskfreeRate_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfActivityUnderThePlanTableTextBlock" xlink:href="nn-20210930.xsd#nn_ScheduleOfActivityUnderThePlanTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ScheduleOfActivityUnderThePlanTableTextBlock_lbl" xml:lang="en-US">Schedule of activity under the plan</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfActivityUnderThePlanTableTextBlock" xlink:to="nn_ScheduleOfActivityUnderThePlanTableTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_lbl" xml:lang="en-US">Options to Acquire Units, Granted</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionGrantsInPeriodWeightedAverageExercisePrice" xlink:href="nn-20210930.xsd#nn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionGrantsInPeriodWeightedAverageExercisePrice"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionGrantsInPeriodWeightedAverageExercisePrice_lbl" xml:lang="en-US">Weighted Average Exercise Price per Unit, Granted</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionGrantsInPeriodWeightedAverageExercisePrice" xlink:to="nn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionGrantsInPeriodWeightedAverageExercisePrice_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueGranted" xlink:href="nn-20210930.xsd#nn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueGranted"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueGranted_lbl" xml:lang="en-US">Aggregate Intrinsic Value, Granted</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueGranted" xlink:to="nn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueGranted_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCancelledInPeriodGross" xlink:href="nn-20210930.xsd#nn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCancelledInPeriodGross"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCancelledInPeriodGross_lbl" xml:lang="en-US">Options to Acquire Units, Cancelled</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCancelledInPeriodGross" xlink:to="nn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCancelledInPeriodGross_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionCancelledInPeriodWeightedAverageExercisePrice" xlink:href="nn-20210930.xsd#nn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionCancelledInPeriodWeightedAverageExercisePrice"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionCancelledInPeriodWeightedAverageExercisePrice_lbl" xml:lang="en-US">Weighted Average Exercise Price per Unit, Cancelled</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionCancelledInPeriodWeightedAverageExercisePrice" xlink:to="nn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionCancelledInPeriodWeightedAverageExercisePrice_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueCancelled" xlink:href="nn-20210930.xsd#nn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueCancelled"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueCancelled_lbl" xml:lang="en-US">Aggregate Intrinsic Value, Cancelled</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueCancelled" xlink:to="nn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueCancelled_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodGros" xlink:href="nn-20210930.xsd#nn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodGros"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodGros_lbl" xml:lang="en-US">Options to Acquire Units, Exercised</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodGros" xlink:to="nn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodGros_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_lbl" xml:lang="en-US">Weighted Average Exercise Price per Unit, Exercised</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueExercised" xlink:href="nn-20210930.xsd#nn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueExercised"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueExercised_lbl" xml:lang="en-US">Aggregate Intrinsic Value, Exercised</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueExercised" xlink:to="nn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueExercised_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_lbl" xml:lang="en-US">Options to Acquire Units, Options to Acquire Units, Options exercisable at December 31, 2020</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice_lbl" xml:lang="en-US">Weighted Average Exercise Price per Unit, Options exercisable at December 31, 2020</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue_lbl" xml:lang="en-US">Aggregate Intrinsic Value, Options exercisable at December 31, 2020</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_lbl" xml:lang="en-US">Schedule of weighted average grant date fair value under the plan</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock" xlink:to="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_lbl" xml:lang="en-US">Options,granted (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_lbl0" xml:lang="en-US">Profit Interest Units, Granted</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_lbl1" xml:lang="en-US">Units granted</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_lbl1"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xml:lang="en-US">Weighted-Average Grant-Date Fair Value, granted</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl0" xml:lang="en-US">Weighted-Average Grant-Date Fair Value, Units granted</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_lbl" xml:lang="en-US">Options vested (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_lbl0" xml:lang="en-US">Profit Interest Units, Units vested at December 31, 2020</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_lbl" xml:lang="en-US">Weighted-Average Grant-Date Fair Value, vested</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_lbl0" xml:lang="en-US">Weighted-Average Grant-Date Fair Value, Units vested</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ScheduleOfShareBasedCompensationStockOptionsAndStockAppreciationRightsAwardActivityTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationStockOptionsAndStockAppreciationRightsAwardActivityTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfShareBasedCompensationStockOptionsAndStockAppreciationRightsAwardActivityTableTextBlock_lbl" xml:lang="en-US">Schedule of weighted average grant date fair value under the plan</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfShareBasedCompensationStockOptionsAndStockAppreciationRightsAwardActivityTableTextBlock" xlink:to="us-gaap_ScheduleOfShareBasedCompensationStockOptionsAndStockAppreciationRightsAwardActivityTableTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_WeightedAverageDistributionsHurdlePerUnitGranted" xlink:href="nn-20210930.xsd#nn_WeightedAverageDistributionsHurdlePerUnitGranted"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_WeightedAverageDistributionsHurdlePerUnitGranted_lbl" xml:lang="en-US">Weighted Average Distribution Hurdle per Unit, Granted</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WeightedAverageDistributionsHurdlePerUnitGranted" xlink:to="nn_WeightedAverageDistributionsHurdlePerUnitGranted_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsCancelledInPeriodWeightedAverageExercisePrice" xlink:href="nn-20210930.xsd#nn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsCancelledInPeriodWeightedAverageExercisePrice"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsCancelledInPeriodWeightedAverageExercisePrice_lbl" xml:lang="en-US">Profit Interest Units, Cancelled</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsCancelledInPeriodWeightedAverageExercisePrice" xlink:to="nn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsCancelledInPeriodWeightedAverageExercisePrice_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_WeightedAverageDistributionsHurdlesPerUnitCancelled" xlink:href="nn-20210930.xsd#nn_WeightedAverageDistributionsHurdlesPerUnitCancelled"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_WeightedAverageDistributionsHurdlesPerUnitCancelled_lbl" xml:lang="en-US">Weighted Average Distribution Hurdle per Unit, Cancelled</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WeightedAverageDistributionsHurdlesPerUnitCancelled" xlink:to="nn_WeightedAverageDistributionsHurdlesPerUnitCancelled_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_WeightedAverageDistributionsHurdlePerUnitUnitsVested" xlink:href="nn-20210930.xsd#nn_WeightedAverageDistributionsHurdlePerUnitUnitsVested"/>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WeightedAverageDistributionsHurdlePerUnitUnitsVested" xlink:to="nn_WeightedAverageDistributionsHurdlePerUnitUnitsVested_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueVested" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueVested"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueVested_lbl" xml:lang="en-US">Aggregate Intrinsic Value, Units vested at December 31, 2020</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueVested" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueVested_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValueTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValueTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValueTableTextBlock_lbl" xml:lang="en-US">Schedule of weighted average grant date fair value under the plan</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValueTableTextBlock" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValueTableTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_lbl" xml:lang="en-US">Units vested</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_UnitsNonvestedUnitsVested" xlink:href="nn-20210930.xsd#nn_UnitsNonvestedUnitsVested"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_UnitsNonvestedUnitsVested_lbl" xml:lang="en-US">Units vested</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_UnitsNonvestedUnitsVested" xlink:to="nn_UnitsNonvestedUnitsVested_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_WeightedAverageGrantDateFairValueUnitsVested" xlink:href="nn-20210930.xsd#nn_WeightedAverageGrantDateFairValueUnitsVested"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_WeightedAverageGrantDateFairValueUnitsVested_lbl" xml:lang="en-US">Weighted-Average Grant-Date Fair Value, Units vested</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WeightedAverageGrantDateFairValueUnitsVested" xlink:to="nn_WeightedAverageGrantDateFairValueUnitsVested_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfDistributionHurdlesPerUnitForProfitsInterestUnitsOutstandingTableTextBlock" xlink:href="nn-20210930.xsd#nn_ScheduleOfDistributionHurdlesPerUnitForProfitsInterestUnitsOutstandingTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ScheduleOfDistributionHurdlesPerUnitForProfitsInterestUnitsOutstandingTableTextBlock_lbl" xml:lang="en-US">Schedule of distribution hurdles per unit for Profits Interest Units outstanding</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfDistributionHurdlesPerUnitForProfitsInterestUnitsOutstandingTableTextBlock" xlink:to="nn_ScheduleOfDistributionHurdlesPerUnitForProfitsInterestUnitsOutstandingTableTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_IncentiveDistributionDistributionPerUnit" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncentiveDistributionDistributionPerUnit"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncentiveDistributionDistributionPerUnit_lbl" xml:lang="en-US">Total profit interests outstanding (in Dollars per share)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncentiveDistributionDistributionPerUnit" xlink:to="us-gaap_IncentiveDistributionDistributionPerUnit_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_OtherOwnershipInterestsUnitsOutstanding" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherOwnershipInterestsUnitsOutstanding"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherOwnershipInterestsUnitsOutstanding_lbl" xml:lang="en-US">Total profit interests outstanding</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherOwnershipInterestsUnitsOutstanding" xlink:to="us-gaap_OtherOwnershipInterestsUnitsOutstanding_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ScheduleOfTotalEquitybasedCompensationExpenseTableTextBlock" xlink:href="nn-20210930.xsd#nn_ScheduleOfTotalEquitybasedCompensationExpenseTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ScheduleOfTotalEquitybasedCompensationExpenseTableTextBlock_lbl" xml:lang="en-US">Schedule of total equity-based compensation expense</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ScheduleOfTotalEquitybasedCompensationExpenseTableTextBlock" xlink:to="nn_ScheduleOfTotalEquitybasedCompensationExpenseTableTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_OtherResearchAndDevelopmentExpense" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherResearchAndDevelopmentExpense"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherResearchAndDevelopmentExpense_lbl" xml:lang="en-US">Research and development</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherResearchAndDevelopmentExpense" xlink:to="us-gaap_OtherResearchAndDevelopmentExpense_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_OtherGeneralAndAdministrativeExpense" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherGeneralAndAdministrativeExpense"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherGeneralAndAdministrativeExpense_lbl" xml:lang="en-US">General and administrative</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherGeneralAndAdministrativeExpense" xlink:to="us-gaap_OtherGeneralAndAdministrativeExpense_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xml:lang="en-US">Total equity-based compensation</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AllocatedShareBasedCompensationExpense" xlink:to="us-gaap_AllocatedShareBasedCompensationExpense_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_lbl" xml:lang="en-US">Schedule of future minimum payments under these operating lease agreements</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_lbl" xml:lang="en-US">2021</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_lbl" xml:lang="en-US">2022</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_lbl" xml:lang="en-US">2023</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_lbl" xml:lang="en-US">2024</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_lbl" xml:lang="en-US">Thereafter</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_DeferredTaxAssetsAbstract" xlink:href="nn-20210930.xsd#nn_DeferredTaxAssetsAbstract"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_DeferredTaxAssetsAbstract_lbl" xml:lang="en-US">Deferred tax assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_DeferredTaxAssetsAbstract" xlink:to="nn_DeferredTaxAssetsAbstract_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_DeferredTaxAssetsOperatingLossCarryforwards" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwards"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_lbl" xml:lang="en-US">Net operating loss carryforwards</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsOperatingLossCarryforwards" xlink:to="us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock_lbl" xml:lang="en-US">Retirement Plan</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock" xlink:to="us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_DeferredTaxAssetsValuationAllowance" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredTaxAssetsValuationAllowance"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_DeferredTaxAssetsValuationAllowance_lbl" xml:lang="en-US">Valuation allowance</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsValuationAllowance" xlink:to="us-gaap_DeferredTaxAssetsValuationAllowance_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:label="us-gaap_DeferredTaxAssetsValuationAllowance_lbl0" xml:lang="en-US">Less valuation allowance</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsValuationAllowance" xlink:to="us-gaap_DeferredTaxAssetsValuationAllowance_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_AssetRetirementObligationLiabilitiesSettled" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetRetirementObligationLiabilitiesSettled"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_AssetRetirementObligationLiabilitiesSettled_lbl" xml:lang="en-US">Liabilities settled</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetRetirementObligationLiabilitiesSettled" xlink:to="us-gaap_AssetRetirementObligationLiabilitiesSettled_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xml:lang="en-US">Accumulated depreciation</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:to="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_FairValueInputsLevel1Member" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueInputsLevel1Member_lbl" xml:lang="en-US">Quoted Prices in Active Markets (Level 1) [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueInputsLevel1Member" xlink:to="us-gaap_FairValueInputsLevel1Member_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_FairValueInputsLevel1Member_lbl0" xml:lang="en-US">Level 1 [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueInputsLevel1Member" xlink:to="us-gaap_FairValueInputsLevel1Member_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_FairValueInputsLevel2Member" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueInputsLevel2Member_lbl" xml:lang="en-US">Significant Other Observable Inputs (Level 2) [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueInputsLevel2Member" xlink:to="us-gaap_FairValueInputsLevel2Member_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_FairValueInputsLevel2Member_lbl0" xml:lang="en-US">Level 2 [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueInputsLevel2Member" xlink:to="us-gaap_FairValueInputsLevel2Member_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_FairValueInputsLevel3Member" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl" xml:lang="en-US">Significant Other Unobservable Inputs (Level 3) [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueInputsLevel3Member" xlink:to="us-gaap_FairValueInputsLevel3Member_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl0" xml:lang="en-US">Level 3 [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueInputsLevel3Member" xlink:to="us-gaap_FairValueInputsLevel3Member_lbl0"/>
    <loc xlink:type="locator" xlink:label="srt_MinimumMember" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MinimumMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="srt_MinimumMember_lbl" xml:lang="en-US">Minimum [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_MinimumMember" xlink:to="srt_MinimumMember_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_PrivatePlacementMember" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PrivatePlacementMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PrivatePlacementMember_lbl" xml:lang="en-US">Private Placement Warrants [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PrivatePlacementMember" xlink:to="us-gaap_PrivatePlacementMember_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_PrivatePlacementMember_lbl0" xml:lang="en-US">Private Placement [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PrivatePlacementMember" xlink:to="us-gaap_PrivatePlacementMember_lbl0"/>
    <loc xlink:type="locator" xlink:label="srt_MaximumMember" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MaximumMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="srt_MaximumMember_lbl" xml:lang="en-US">Maximum [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_MaximumMember" xlink:to="srt_MaximumMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_PublicMember" xlink:href="nn-20210930.xsd#nn_PublicMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_PublicMember_lbl" xml:lang="en-US">Public [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PublicMember" xlink:to="nn_PublicMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_WarrantLiabilitiesMember" xlink:href="nn-20210930.xsd#nn_WarrantLiabilitiesMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_WarrantLiabilitiesMember_lbl" xml:lang="en-US">Warrant Liabilities [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WarrantLiabilitiesMember" xlink:to="nn_WarrantLiabilitiesMember_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_MoneyMarketFundsMember" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MoneyMarketFundsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MoneyMarketFundsMember_lbl" xml:lang="en-US">U.S. Money Market [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MoneyMarketFundsMember" xlink:to="us-gaap_MoneyMarketFundsMember_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_USTreasurySecuritiesMember" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_USTreasurySecuritiesMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_USTreasurySecuritiesMember_lbl" xml:lang="en-US">U.S. Treasury Securities [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_USTreasurySecuritiesMember" xlink:to="us-gaap_USTreasurySecuritiesMember_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_USTreasurySecuritiesMember_lbl0" xml:lang="en-US">US Treasury Securities [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_USTreasurySecuritiesMember" xlink:to="us-gaap_USTreasurySecuritiesMember_lbl0"/>
    <loc xlink:type="locator" xlink:label="nn_AsPreviouslyReportedMember" xlink:href="nn-20210930.xsd#nn_AsPreviouslyReportedMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_AsPreviouslyReportedMember_lbl" xml:lang="en-US">As Previously Reported [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_AsPreviouslyReportedMember" xlink:to="nn_AsPreviouslyReportedMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_AdjustmentsMember" xlink:href="nn-20210930.xsd#nn_AdjustmentsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_AdjustmentsMember_lbl" xml:lang="en-US">Adjustments [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_AdjustmentsMember" xlink:to="nn_AdjustmentsMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_AsRestatedMember" xlink:href="nn-20210930.xsd#nn_AsRestatedMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_AsRestatedMember_lbl" xml:lang="en-US">As Restated [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_AsRestatedMember" xlink:to="nn_AsRestatedMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_PublicWarrantsMember" xlink:href="nn-20210930.xsd#nn_PublicWarrantsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_PublicWarrantsMember_lbl" xml:lang="en-US">Public Warrants [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PublicWarrantsMember" xlink:to="nn_PublicWarrantsMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_NetworkUnderConstructionMember" xlink:href="nn-20210930.xsd#nn_NetworkUnderConstructionMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_NetworkUnderConstructionMember_lbl" xml:lang="en-US">Network under construction [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_NetworkUnderConstructionMember" xlink:to="nn_NetworkUnderConstructionMember_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_OfficeEquipmentMember" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OfficeEquipmentMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OfficeEquipmentMember_lbl" xml:lang="en-US">Office Equipment [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OfficeEquipmentMember" xlink:to="us-gaap_OfficeEquipmentMember_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_OfficeEquipmentMember_lbl0" xml:lang="en-US">Office equipment, furniture, and leasehold improvements [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OfficeEquipmentMember" xlink:to="us-gaap_OfficeEquipmentMember_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_LeaseholdImprovementsMember" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LeaseholdImprovementsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LeaseholdImprovementsMember_lbl" xml:lang="en-US">Leasehold Improvements [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LeaseholdImprovementsMember" xlink:to="us-gaap_LeaseholdImprovementsMember_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ConstructionMember" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConstructionMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ConstructionMember_lbl" xml:lang="en-US">Network under construction [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConstructionMember" xlink:to="us-gaap_ConstructionMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ATTNetworkMember" xlink:href="nn-20210930.xsd#nn_ATTNetworkMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ATTNetworkMember_lbl" xml:lang="en-US">AT&amp;T network [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ATTNetworkMember" xlink:to="nn_ATTNetworkMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_NEXTNAVHOLDINGSLLCMember" xlink:href="nn-20210930.xsd#nn_NEXTNAVHOLDINGSLLCMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_NEXTNAVHOLDINGSLLCMember_lbl" xml:lang="en-US">NEXTNAV HOLDINGS, LLC [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_NEXTNAVHOLDINGSLLCMember" xlink:to="nn_NEXTNAVHOLDINGSLLCMember_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="nn_NEXTNAVHOLDINGSLLCMember_lbl0" xml:lang="en-US">NextNav [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_NEXTNAVHOLDINGSLLCMember" xlink:to="nn_NEXTNAVHOLDINGSLLCMember_lbl0"/>
    <loc xlink:type="locator" xlink:label="nn_ProfitsInterestMember" xlink:href="nn-20210930.xsd#nn_ProfitsInterestMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ProfitsInterestMember_lbl" xml:lang="en-US">Profits Interest [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ProfitsInterestMember" xlink:to="nn_ProfitsInterestMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_StockOptionsMember" xlink:href="nn-20210930.xsd#nn_StockOptionsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_StockOptionsMember_lbl" xml:lang="en-US">Stock Options [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StockOptionsMember" xlink:to="nn_StockOptionsMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ProfitsInterestUnitActivityMember" xlink:href="nn-20210930.xsd#nn_ProfitsInterestUnitActivityMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ProfitsInterestUnitActivityMember_lbl" xml:lang="en-US">Profits Interest Unit activity [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ProfitsInterestUnitActivityMember" xlink:to="nn_ProfitsInterestUnitActivityMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_B4RestrictedCommonUnitsMember" xlink:href="nn-20210930.xsd#nn_B4RestrictedCommonUnitsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_B4RestrictedCommonUnitsMember_lbl" xml:lang="en-US">B-4 Restricted Common Units [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_B4RestrictedCommonUnitsMember" xlink:to="nn_B4RestrictedCommonUnitsMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ClassB1CommonUnitsOneMember" xlink:href="nn-20210930.xsd#nn_ClassB1CommonUnitsOneMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ClassB1CommonUnitsOneMember_lbl" xml:lang="en-US">Class B-1 Common Units One [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ClassB1CommonUnitsOneMember" xlink:to="nn_ClassB1CommonUnitsOneMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ClassB1CommonUnitsTwoMember" xlink:href="nn-20210930.xsd#nn_ClassB1CommonUnitsTwoMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ClassB1CommonUnitsTwoMember_lbl" xml:lang="en-US">Class B-1 Common Units Two [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ClassB1CommonUnitsTwoMember" xlink:to="nn_ClassB1CommonUnitsTwoMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ClassB1CommonUnitsThreeMember" xlink:href="nn-20210930.xsd#nn_ClassB1CommonUnitsThreeMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ClassB1CommonUnitsThreeMember_lbl" xml:lang="en-US">Class B-1 Common Units Three [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ClassB1CommonUnitsThreeMember" xlink:to="nn_ClassB1CommonUnitsThreeMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ClassB1CommonUnitsFourMember" xlink:href="nn-20210930.xsd#nn_ClassB1CommonUnitsFourMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ClassB1CommonUnitsFourMember_lbl" xml:lang="en-US">Class B-1 Common Units Four [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ClassB1CommonUnitsFourMember" xlink:to="nn_ClassB1CommonUnitsFourMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ClassB2CommonUnitsOneMember" xlink:href="nn-20210930.xsd#nn_ClassB2CommonUnitsOneMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ClassB2CommonUnitsOneMember_lbl" xml:lang="en-US">Class B-2 Common Units One [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ClassB2CommonUnitsOneMember" xlink:to="nn_ClassB2CommonUnitsOneMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ClassB3CommonUnitsOneMember" xlink:href="nn-20210930.xsd#nn_ClassB3CommonUnitsOneMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ClassB3CommonUnitsOneMember_lbl" xml:lang="en-US">Class B-3 Common Units One [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ClassB3CommonUnitsOneMember" xlink:to="nn_ClassB3CommonUnitsOneMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ClassB2CommonUnitsTwoMember" xlink:href="nn-20210930.xsd#nn_ClassB2CommonUnitsTwoMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ClassB2CommonUnitsTwoMember_lbl" xml:lang="en-US">Class B-2 Common Units Two [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ClassB2CommonUnitsTwoMember" xlink:to="nn_ClassB2CommonUnitsTwoMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_PIPEAxis" xlink:href="nn-20210930.xsd#nn_PIPEAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_PIPEAxis_lbl" xml:lang="en-US">PIPE [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PIPEAxis" xlink:to="nn_PIPEAxis_lbl"/>
    <loc xlink:type="locator" xlink:label="srt_OwnershipAxis" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_OwnershipAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="srt_OwnershipAxis_lbl" xml:lang="en-US">Ownership [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_OwnershipAxis" xlink:to="srt_OwnershipAxis_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl" xml:lang="en-US">Related Party [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl"/>
    <loc xlink:type="locator" xlink:label="srt_MajorCustomersAxis" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MajorCustomersAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="srt_MajorCustomersAxis_lbl" xml:lang="en-US">Customer [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_MajorCustomersAxis" xlink:to="srt_MajorCustomersAxis_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_SubsequentEventTypeAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsequentEventTypeAxis_lbl" xml:lang="en-US">Subsequent Event Type [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventTypeAxis" xlink:to="us-gaap_SubsequentEventTypeAxis_lbl"/>
    <loc xlink:type="locator" xlink:label="srt_StatementScenarioAxis" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_StatementScenarioAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="srt_StatementScenarioAxis_lbl" xml:lang="en-US">Scenario [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_StatementScenarioAxis" xlink:to="srt_StatementScenarioAxis_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ShortTermDebtTypeAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShortTermDebtTypeAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShortTermDebtTypeAxis_lbl" xml:lang="en-US">Short-term Debt, Type [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShortTermDebtTypeAxis" xlink:to="us-gaap_ShortTermDebtTypeAxis_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_RelatedPartyTransactionAxis" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RelatedPartyTransactionAxis"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RelatedPartyTransactionAxis_lbl" xml:lang="en-US">Related Party Transaction [Axis]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionAxis" xlink:to="us-gaap_RelatedPartyTransactionAxis_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodSharesOther" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesOther"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodSharesOther_lbl" xml:lang="en-US">Authority to share issued (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesOther" xlink:to="us-gaap_StockIssuedDuringPeriodSharesOther_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_RegistrationRightsAgreementDescription" xlink:href="nn-20210930.xsd#nn_RegistrationRightsAgreementDescription"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_RegistrationRightsAgreementDescription_lbl" xml:lang="en-US">Registration rights agreement description</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_RegistrationRightsAgreementDescription" xlink:to="nn_RegistrationRightsAgreementDescription_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodSharesAcquisitions" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesAcquisitions"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodSharesAcquisitions_lbl" xml:lang="en-US">Purchase of shares (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesAcquisitions" xlink:to="us-gaap_StockIssuedDuringPeriodSharesAcquisitions_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ProceedsFromIssuanceOfDebt" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromIssuanceOfDebt"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProceedsFromIssuanceOfDebt_lbl" xml:lang="en-US">Gross proceeds</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceOfDebt" xlink:to="us-gaap_ProceedsFromIssuanceOfDebt_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_PaymentsForFees" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsForFees"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PaymentsForFees_lbl" xml:lang="en-US">Due fees</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsForFees" xlink:to="us-gaap_PaymentsForFees_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_SaleOfStockPricePerShare" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SaleOfStockPricePerShare"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SaleOfStockPricePerShare_lbl" xml:lang="en-US">Per unit price (in Dollars per share)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SaleOfStockPricePerShare" xlink:to="us-gaap_SaleOfStockPricePerShare_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_SaleOfStockDescriptionOfTransaction" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SaleOfStockDescriptionOfTransaction"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SaleOfStockDescriptionOfTransaction_lbl" xml:lang="en-US">Description of warrant</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SaleOfStockDescriptionOfTransaction" xlink:to="us-gaap_SaleOfStockDescriptionOfTransaction_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_TransactionCosts" xlink:href="nn-20210930.xsd#nn_TransactionCosts"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_TransactionCosts_lbl" xml:lang="en-US">Transaction costs</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_TransactionCosts" xlink:to="nn_TransactionCosts_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_UnderwritingDiscount" xlink:href="nn-20210930.xsd#nn_UnderwritingDiscount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_UnderwritingDiscount_lbl" xml:lang="en-US">Underwriting discount</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_UnderwritingDiscount" xlink:to="nn_UnderwritingDiscount_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="nn_UnderwritingDiscount_lbl0" xml:lang="en-US">Underwriters&#8217; discount</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_UnderwritingDiscount" xlink:to="nn_UnderwritingDiscount_lbl0"/>
    <loc xlink:type="locator" xlink:label="nn_DeferredUnderwritersDiscount" xlink:href="nn-20210930.xsd#nn_DeferredUnderwritersDiscount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_DeferredUnderwritersDiscount_lbl" xml:lang="en-US">Deferred underwriters discount</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_DeferredUnderwritersDiscount" xlink:to="nn_DeferredUnderwritersDiscount_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="nn_DeferredUnderwritersDiscount_lbl0" xml:lang="en-US">Deferred underwriters&#8217; discount</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_DeferredUnderwritersDiscount" xlink:to="nn_DeferredUnderwritersDiscount_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_OtherOwnershipInterestsOfferingCosts" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherOwnershipInterestsOfferingCosts"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherOwnershipInterestsOfferingCosts_lbl" xml:lang="en-US">Other offering costs</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherOwnershipInterestsOfferingCosts" xlink:to="us-gaap_OtherOwnershipInterestsOfferingCosts_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_OfferingCosts" xlink:href="nn-20210930.xsd#nn_OfferingCosts"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_OfferingCosts_lbl" xml:lang="en-US">Offering costs</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_OfferingCosts" xlink:to="nn_OfferingCosts_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="nn_OfferingCosts_lbl0" xml:lang="en-US">Other offering expenses</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_OfferingCosts" xlink:to="nn_OfferingCosts_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_WarrantsAndRightsOutstanding" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_WarrantsAndRightsOutstanding"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_WarrantsAndRightsOutstanding_lbl" xml:lang="en-US">Warrant outstanding amount</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WarrantsAndRightsOutstanding" xlink:to="us-gaap_WarrantsAndRightsOutstanding_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_MinimumPercentageOfTrustAccountRequiredForBusinessCombinationPercentage" xlink:href="nn-20210930.xsd#nn_MinimumPercentageOfTrustAccountRequiredForBusinessCombinationPercentage"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_MinimumPercentageOfTrustAccountRequiredForBusinessCombinationPercentage_lbl" xml:lang="en-US">Minimum percentage of trust account required for business combination</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_MinimumPercentageOfTrustAccountRequiredForBusinessCombinationPercentage" xlink:to="nn_MinimumPercentageOfTrustAccountRequiredForBusinessCombinationPercentage_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_PercentageOfOutstandingVotingSecurities" xlink:href="nn-20210930.xsd#nn_PercentageOfOutstandingVotingSecurities"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_PercentageOfOutstandingVotingSecurities_lbl" xml:lang="en-US">Percentage of outstanding voting securities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PercentageOfOutstandingVotingSecurities" xlink:to="nn_PercentageOfOutstandingVotingSecurities_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_DescriptionOfBusinessAcquisition" xlink:href="nn-20210930.xsd#nn_DescriptionOfBusinessAcquisition"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_DescriptionOfBusinessAcquisition_lbl" xml:lang="en-US">Description of business acquisition</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_DescriptionOfBusinessAcquisition" xlink:to="nn_DescriptionOfBusinessAcquisition_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_NetTangibleAssets" xlink:href="nn-20210930.xsd#nn_NetTangibleAssets"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_NetTangibleAssets_lbl" xml:lang="en-US">Net tangible assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_NetTangibleAssets" xlink:to="nn_NetTangibleAssets_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_InitialBusinessCombinationRedeemPercentage" xlink:href="nn-20210930.xsd#nn_InitialBusinessCombinationRedeemPercentage"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_InitialBusinessCombinationRedeemPercentage_lbl" xml:lang="en-US">Initial business combination redeem percentage</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_InitialBusinessCombinationRedeemPercentage" xlink:to="nn_InitialBusinessCombinationRedeemPercentage_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_PossibleDissolutionExpenses" xlink:href="nn-20210930.xsd#nn_PossibleDissolutionExpenses"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_PossibleDissolutionExpenses_lbl" xml:lang="en-US">Possible dissolution expenses</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PossibleDissolutionExpenses" xlink:to="nn_PossibleDissolutionExpenses_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ConsummationOfTheTransactions" xlink:href="nn-20210930.xsd#nn_ConsummationOfTheTransactions"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ConsummationOfTheTransactions_lbl" xml:lang="en-US">Consummation of transactions, description</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ConsummationOfTheTransactions" xlink:to="nn_ConsummationOfTheTransactions_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ProceedsOfThePIPEInvestment" xlink:href="nn-20210930.xsd#nn_ProceedsOfThePIPEInvestment"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ProceedsOfThePIPEInvestment_lbl" xml:lang="en-US">Proceeds of the PIPE Investment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ProceedsOfThePIPEInvestment" xlink:to="nn_ProceedsOfThePIPEInvestment_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_RegistrationRightsAgreement" xlink:href="nn-20210930.xsd#nn_RegistrationRightsAgreement"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_RegistrationRightsAgreement_lbl" xml:lang="en-US">Registration rights agreement, description</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_RegistrationRightsAgreement" xlink:to="nn_RegistrationRightsAgreement_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_PIPEInvestors" xlink:href="nn-20210930.xsd#nn_PIPEInvestors"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_PIPEInvestors_lbl" xml:lang="en-US">PIPE Investors</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PIPEInvestors" xlink:to="nn_PIPEInvestors_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_PurchasePricePerShare" xlink:href="nn-20210930.xsd#nn_PurchasePricePerShare"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_PurchasePricePerShare_lbl" xml:lang="en-US">Purchase price per share (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PurchasePricePerShare" xlink:to="nn_PurchasePricePerShare_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_AggregateGrossProceeds" xlink:href="nn-20210930.xsd#nn_AggregateGrossProceeds"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_AggregateGrossProceeds_lbl" xml:lang="en-US">Aggregate gross proceeds</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_AggregateGrossProceeds" xlink:to="nn_AggregateGrossProceeds_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="nn_AggregateGrossProceeds_lbl0" xml:lang="en-US">Aggregate gross proceeds (in Dollars)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_AggregateGrossProceeds" xlink:to="nn_AggregateGrossProceeds_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_DebtInstrumentFeeAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentFeeAmount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentFeeAmount_lbl" xml:lang="en-US">Due fee amount</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentFeeAmount" xlink:to="us-gaap_DebtInstrumentFeeAmount_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DebtInstrumentFeeAmount_lbl0" xml:lang="en-US">Commitment fee</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentFeeAmount" xlink:to="us-gaap_DebtInstrumentFeeAmount_lbl0"/>
    <loc xlink:type="locator" xlink:label="nn_OperatingBankAccount" xlink:href="nn-20210930.xsd#nn_OperatingBankAccount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_OperatingBankAccount_lbl" xml:lang="en-US">Operating bank account</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_OperatingBankAccount" xlink:to="nn_OperatingBankAccount_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_WorkingCapital" xlink:href="nn-20210930.xsd#nn_WorkingCapital"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_WorkingCapital_lbl" xml:lang="en-US">Working capital</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WorkingCapital" xlink:to="nn_WorkingCapital_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_SharesIssuedPricePerShare" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharesIssuedPricePerShare"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SharesIssuedPricePerShare_lbl" xml:lang="en-US">Price per share (in Dollars per share)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharesIssuedPricePerShare" xlink:to="us-gaap_SharesIssuedPricePerShare_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_AggregateOfSharePercentage" xlink:href="nn-20210930.xsd#nn_AggregateOfSharePercentage"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_AggregateOfSharePercentage_lbl" xml:lang="en-US">Aggregate of shares percentage</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_AggregateOfSharePercentage" xlink:to="nn_AggregateOfSharePercentage_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodSharesConversionOfUnits" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesConversionOfUnits"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodSharesConversionOfUnits_lbl" xml:lang="en-US">Authorized units (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesConversionOfUnits" xlink:to="us-gaap_StockIssuedDuringPeriodSharesConversionOfUnits_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_AreaLocationTransmitters" xlink:href="nn-20210930.xsd#nn_AreaLocationTransmitters"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_AreaLocationTransmitters_lbl" xml:lang="en-US">Area location transmitters (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_AreaLocationTransmitters" xlink:to="nn_AreaLocationTransmitters_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_NonCancellableContracts" xlink:href="nn-20210930.xsd#nn_NonCancellableContracts"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_NonCancellableContracts_lbl" xml:lang="en-US">Non cancellable contracts</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_NonCancellableContracts" xlink:to="nn_NonCancellableContracts_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_NumberOfCustomer" xlink:href="nn-20210930.xsd#nn_NumberOfCustomer"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_NumberOfCustomer_lbl" xml:lang="en-US">Customers</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_NumberOfCustomer" xlink:to="nn_NumberOfCustomer_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_CostOfRevenue" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CostOfRevenue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CostOfRevenue_lbl" xml:lang="en-US">Total revenue</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CostOfRevenue" xlink:to="us-gaap_CostOfRevenue_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_CostsIncurredDevelopmentCosts" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CostsIncurredDevelopmentCosts"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CostsIncurredDevelopmentCosts_lbl" xml:lang="en-US">Capitalized development cost</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CostsIncurredDevelopmentCosts" xlink:to="us-gaap_CostsIncurredDevelopmentCosts_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_AdjustmentForAmortization" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdjustmentForAmortization"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AdjustmentForAmortization_lbl" xml:lang="en-US">Amortization</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdjustmentForAmortization" xlink:to="us-gaap_AdjustmentForAmortization_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_RevenuesExpected" xlink:href="nn-20210930.xsd#nn_RevenuesExpected"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_RevenuesExpected_lbl" xml:lang="en-US">Revenues expected to be recognized</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_RevenuesExpected" xlink:to="nn_RevenuesExpected_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_WarrantsOutstanding" xlink:href="nn-20210930.xsd#nn_WarrantsOutstanding"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_WarrantsOutstanding_lbl" xml:lang="en-US">Warrants outstanding (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WarrantsOutstanding" xlink:to="nn_WarrantsOutstanding_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_QuotePrice" xlink:href="nn-20210930.xsd#nn_QuotePrice"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_QuotePrice_lbl" xml:lang="en-US">Fair value of quote price (in Dollars per share)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_QuotePrice" xlink:to="nn_QuotePrice_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_FederalDepositoryInsuranceCoverage" xlink:href="nn-20210930.xsd#nn_FederalDepositoryInsuranceCoverage"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_FederalDepositoryInsuranceCoverage_lbl" xml:lang="en-US">Federal depository insurance coverage</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FederalDepositoryInsuranceCoverage" xlink:to="nn_FederalDepositoryInsuranceCoverage_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_TemporaryEquityShareSubscriptions" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TemporaryEquityShareSubscriptions"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_TemporaryEquityShareSubscriptions_lbl" xml:lang="en-US">Temporary equity (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TemporaryEquityShareSubscriptions" xlink:to="us-gaap_TemporaryEquityShareSubscriptions_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_WeightedAverageNumberOfSharesCommonStock" xlink:href="nn-20210930.xsd#nn_WeightedAverageNumberOfSharesCommonStock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_WeightedAverageNumberOfSharesCommonStock_lbl" xml:lang="en-US">Warrants exercisable to purchase (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WeightedAverageNumberOfSharesCommonStock" xlink:to="nn_WeightedAverageNumberOfSharesCommonStock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_AssetsHeldInTrustCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsHeldInTrustCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AssetsHeldInTrustCurrent_lbl" xml:lang="en-US">Assets held in the trust account</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsHeldInTrustCurrent" xlink:to="us-gaap_AssetsHeldInTrustCurrent_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_AssetsHeldInTrustCurrent_lbl0" xml:lang="en-US">Assets Held-in-trust, Current (in Dollars)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsHeldInTrustCurrent" xlink:to="us-gaap_AssetsHeldInTrustCurrent_lbl0"/>
    <loc xlink:type="locator" xlink:label="us-gaap_DepositsMoneyMarketDeposits" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DepositsMoneyMarketDeposits"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DepositsMoneyMarketDeposits_lbl" xml:lang="en-US">Money market funds</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DepositsMoneyMarketDeposits" xlink:to="us-gaap_DepositsMoneyMarketDeposits_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_IncreaseDecreaseInDeposits" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInDeposits"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncreaseDecreaseInDeposits_lbl" xml:lang="en-US">Increase (Decrease) in Deposits</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInDeposits" xlink:to="us-gaap_IncreaseDecreaseInDeposits_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_InterestExpenseSecuritySoldUnderAgreementToRepurchaseIncreaseDecrease" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestExpenseSecuritySoldUnderAgreementToRepurchaseIncreaseDecrease"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InterestExpenseSecuritySoldUnderAgreementToRepurchaseIncreaseDecrease_lbl" xml:lang="en-US">Interest Expense, Security Sold under Agreement to Repurchase, Increase (Decrease)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestExpenseSecuritySoldUnderAgreementToRepurchaseIncreaseDecrease" xlink:to="us-gaap_InterestExpenseSecuritySoldUnderAgreementToRepurchaseIncreaseDecrease_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_PurchaseAggregateShares" xlink:href="nn-20210930.xsd#nn_PurchaseAggregateShares"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_PurchaseAggregateShares_lbl" xml:lang="en-US">Aggregate purchase share (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PurchaseAggregateShares" xlink:to="nn_PurchaseAggregateShares_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl" xml:lang="en-US">Warrants price, per share</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:to="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl0" xml:lang="en-US">Price per warrant (in Dollars per share)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:to="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl1" xml:lang="en-US">Purchase of warrants per unit (in Dollars per share)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:to="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl2" xml:lang="en-US">Price per unit (in Dollars per share)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:to="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl2"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl3" xml:lang="en-US">Exercise price (in Dollars per share)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:to="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl3"/>
    <loc xlink:type="locator" xlink:label="nn_CommonStockExercisePrice" xlink:href="nn-20210930.xsd#nn_CommonStockExercisePrice"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_CommonStockExercisePrice_lbl" xml:lang="en-US">Common stock price, per share</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonStockExercisePrice" xlink:to="nn_CommonStockExercisePrice_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_IdenticalWarrants" xlink:href="nn-20210930.xsd#nn_IdenticalWarrants"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_IdenticalWarrants_lbl" xml:lang="en-US">Identical warrants (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_IdenticalWarrants" xlink:to="nn_IdenticalWarrants_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_WarrantsPurchasePricePerShare" xlink:href="nn-20210930.xsd#nn_WarrantsPurchasePricePerShare"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_WarrantsPurchasePricePerShare_lbl" xml:lang="en-US">Warrants purchase price, per share</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WarrantsPurchasePricePerShare" xlink:to="nn_WarrantsPurchasePricePerShare_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_SponorPayments" xlink:href="nn-20210930.xsd#nn_SponorPayments"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_SponorPayments_lbl" xml:lang="en-US">Sponsor payments</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SponorPayments" xlink:to="nn_SponorPayments_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_SponsorPricePerShare" xlink:href="nn-20210930.xsd#nn_SponsorPricePerShare"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_SponsorPricePerShare_lbl" xml:lang="en-US">Sponsor price per share (in Dollars per share)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SponsorPricePerShare" xlink:to="nn_SponsorPricePerShare_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_CommonStockSharesConsideration" xlink:href="nn-20210930.xsd#nn_CommonStockSharesConsideration"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_CommonStockSharesConsideration_lbl" xml:lang="en-US">Common stock shares consideration (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonStockSharesConsideration" xlink:to="nn_CommonStockSharesConsideration_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_AggregateFounderShare" xlink:href="nn-20210930.xsd#nn_AggregateFounderShare"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_AggregateFounderShare_lbl" xml:lang="en-US">Aggregate founder share (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_AggregateFounderShare" xlink:to="nn_AggregateFounderShare_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationForfeited" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationForfeited"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationForfeited_lbl" xml:lang="en-US">Subject to forfeiture shares (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationForfeited" xlink:to="us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationForfeited_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_IssuedAndOutstandingStockPercentage" xlink:href="nn-20210930.xsd#nn_IssuedAndOutstandingStockPercentage"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_IssuedAndOutstandingStockPercentage_lbl" xml:lang="en-US">Percentage of issued and outstanding stock</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_IssuedAndOutstandingStockPercentage" xlink:to="nn_IssuedAndOutstandingStockPercentage_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_FounderSharesForfeited" xlink:href="nn-20210930.xsd#nn_FounderSharesForfeited"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_FounderSharesForfeited_lbl" xml:lang="en-US">Forfeited founder shares (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FounderSharesForfeited" xlink:to="nn_FounderSharesForfeited_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_CommonStockExceedsPerShare" xlink:href="nn-20210930.xsd#nn_CommonStockExceedsPerShare"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_CommonStockExceedsPerShare_lbl" xml:lang="en-US">Common stock exceeds, per share (in Dollars per share)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonStockExceedsPerShare" xlink:to="nn_CommonStockExceedsPerShare_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_WorkingCapitalLoans" xlink:href="nn-20210930.xsd#nn_WorkingCapitalLoans"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_WorkingCapitalLoans_lbl" xml:lang="en-US">Working capital loans</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WorkingCapitalLoans" xlink:to="nn_WorkingCapitalLoans_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_PrivatePlacementWarrantsPrice" xlink:href="nn-20210930.xsd#nn_PrivatePlacementWarrantsPrice"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_PrivatePlacementWarrantsPrice_lbl" xml:lang="en-US">Private placement warrants price (in Dollars per share)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PrivatePlacementWarrantsPrice" xlink:to="nn_PrivatePlacementWarrantsPrice_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_WorkingCapitalDebt" xlink:href="nn-20210930.xsd#nn_WorkingCapitalDebt"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_WorkingCapitalDebt_lbl" xml:lang="en-US">Working capital fund</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WorkingCapitalDebt" xlink:to="nn_WorkingCapitalDebt_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_WorkingCapitalLoan" xlink:href="nn-20210930.xsd#nn_WorkingCapitalLoan"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_WorkingCapitalLoan_lbl" xml:lang="en-US">Outstanding working capital loan</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WorkingCapitalLoan" xlink:to="nn_WorkingCapitalLoan_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_CapitalUnitsNetAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CapitalUnitsNetAmount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CapitalUnitsNetAmount_lbl" xml:lang="en-US">Increasing working capital</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalUnitsNetAmount" xlink:to="us-gaap_CapitalUnitsNetAmount_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_PaymentForAdministrativeFees" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentForAdministrativeFees"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PaymentForAdministrativeFees_lbl" xml:lang="en-US">Secretarial and administrative services</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentForAdministrativeFees" xlink:to="us-gaap_PaymentForAdministrativeFees_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty_lbl" xml:lang="en-US">Incurred administrative support fees</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty" xlink:to="us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_SubscriptionAgreement" xlink:href="nn-20210930.xsd#nn_SubscriptionAgreement"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_SubscriptionAgreement_lbl" xml:lang="en-US">Subscription agreement (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SubscriptionAgreement" xlink:to="nn_SubscriptionAgreement_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_OtherExpenses" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherExpenses"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherExpenses_lbl" xml:lang="en-US">Cover expenses</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherExpenses" xlink:to="us-gaap_OtherExpenses_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_SecuritiesBorrowed" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SecuritiesBorrowed"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SecuritiesBorrowed_lbl" xml:lang="en-US">Borrowed under promissory note</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SecuritiesBorrowed" xlink:to="us-gaap_SecuritiesBorrowed_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_InvestmentsInTrustAccount" xlink:href="nn-20210930.xsd#nn_InvestmentsInTrustAccount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_InvestmentsInTrustAccount_lbl" xml:lang="en-US">Investments in trust account</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_InvestmentsInTrustAccount" xlink:to="nn_InvestmentsInTrustAccount_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_PurchaseAdditionalUnits" xlink:href="nn-20210930.xsd#nn_PurchaseAdditionalUnits"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_PurchaseAdditionalUnits_lbl" xml:lang="en-US">Purchase additional units (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PurchaseAdditionalUnits" xlink:to="nn_PurchaseAdditionalUnits_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_UnderwritingDiscountFee" xlink:href="nn-20210930.xsd#nn_UnderwritingDiscountFee"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_UnderwritingDiscountFee_lbl" xml:lang="en-US">Underwriting discount (in Dollars per share)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_UnderwritingDiscountFee" xlink:to="nn_UnderwritingDiscountFee_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_DeferredUnderwritingFeesPayableNonCurrent" xlink:href="nn-20210930.xsd#nn_DeferredUnderwritingFeesPayableNonCurrent"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_DeferredUnderwritingFeesPayableNonCurrent_lbl" xml:lang="en-US">Deferred underwriting fees</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_DeferredUnderwritingFeesPayableNonCurrent" xlink:to="nn_DeferredUnderwritingFeesPayableNonCurrent_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_DeferredUnderwritingDiscount" xlink:href="nn-20210930.xsd#nn_DeferredUnderwritingDiscount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_DeferredUnderwritingDiscount_lbl" xml:lang="en-US">Deferred underwriting discount (in Dollars per share)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_DeferredUnderwritingDiscount" xlink:to="nn_DeferredUnderwritingDiscount_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_UnderwriterAmountPayable" xlink:href="nn-20210930.xsd#nn_UnderwriterAmountPayable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_UnderwriterAmountPayable_lbl" xml:lang="en-US">Underwriter amount payable</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_UnderwriterAmountPayable" xlink:to="nn_UnderwriterAmountPayable_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ForfeitedShares" xlink:href="nn-20210930.xsd#nn_ForfeitedShares"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ForfeitedShares_lbl" xml:lang="en-US">Forfeited shares (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ForfeitedShares" xlink:to="nn_ForfeitedShares_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_OperatingLeasesRentExpenseSubleaseRentals1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeasesRentExpenseSubleaseRentals1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OperatingLeasesRentExpenseSubleaseRentals1_lbl" xml:lang="en-US">Rent expenses</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesRentExpenseSubleaseRentals1" xlink:to="us-gaap_OperatingLeasesRentExpenseSubleaseRentals1_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_SaleOfStockPercentageOfOwnershipBeforeTransaction" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SaleOfStockPercentageOfOwnershipBeforeTransaction"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SaleOfStockPercentageOfOwnershipBeforeTransaction_lbl" xml:lang="en-US">Issued and outstanding shares of public offering, percentage</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SaleOfStockPercentageOfOwnershipBeforeTransaction" xlink:to="us-gaap_SaleOfStockPercentageOfOwnershipBeforeTransaction_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_WarrantsForRedemptionDescription" xlink:href="nn-20210930.xsd#nn_WarrantsForRedemptionDescription"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_WarrantsForRedemptionDescription_lbl" xml:lang="en-US">Public warrants, description</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WarrantsForRedemptionDescription" xlink:to="nn_WarrantsForRedemptionDescription_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_WarrantsAndRightsOutstandingTerm" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_WarrantsAndRightsOutstandingTerm"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_WarrantsAndRightsOutstandingTerm_lbl" xml:lang="en-US">Warrant expiration term</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WarrantsAndRightsOutstandingTerm" xlink:to="us-gaap_WarrantsAndRightsOutstandingTerm_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_WarrantRedemptionDescription" xlink:href="nn-20210930.xsd#nn_WarrantRedemptionDescription"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_WarrantRedemptionDescription_lbl" xml:lang="en-US">Warrant redemption, description</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WarrantRedemptionDescription" xlink:to="nn_WarrantRedemptionDescription_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_PublicWarrantsRedemptionDescription" xlink:href="nn-20210930.xsd#nn_PublicWarrantsRedemptionDescription"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_PublicWarrantsRedemptionDescription_lbl" xml:lang="en-US">Public warrants, description</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PublicWarrantsRedemptionDescription" xlink:to="nn_PublicWarrantsRedemptionDescription_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ExcessStockSharesIssued" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ExcessStockSharesIssued"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ExcessStockSharesIssued_lbl" xml:lang="en-US">Common stock issued</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ExcessStockSharesIssued" xlink:to="us-gaap_ExcessStockSharesIssued_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ExcessStockSharesOutstanding" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ExcessStockSharesOutstanding"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ExcessStockSharesOutstanding_lbl" xml:lang="en-US">Common stock outstanding</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ExcessStockSharesOutstanding" xlink:to="us-gaap_ExcessStockSharesOutstanding_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_PossibleRedemption" xlink:href="nn-20210930.xsd#nn_PossibleRedemption"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_PossibleRedemption_lbl" xml:lang="en-US">Possible redemption</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PossibleRedemption" xlink:to="nn_PossibleRedemption_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ConversionBasisPercentage" xlink:href="nn-20210930.xsd#nn_ConversionBasisPercentage"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ConversionBasisPercentage_lbl" xml:lang="en-US">Conversion basis, percentage</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ConversionBasisPercentage" xlink:to="nn_ConversionBasisPercentage_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_PriorWrittenNoticeOfRedemption" xlink:href="nn-20210930.xsd#nn_PriorWrittenNoticeOfRedemption"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_PriorWrittenNoticeOfRedemption_lbl" xml:lang="en-US">Prior written notice of redemption</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PriorWrittenNoticeOfRedemption" xlink:to="nn_PriorWrittenNoticeOfRedemption_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_NoticeOfRedemptionDescription" xlink:href="nn-20210930.xsd#nn_NoticeOfRedemptionDescription"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_NoticeOfRedemptionDescription_lbl" xml:lang="en-US">Notice of redemption description</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_NoticeOfRedemptionDescription" xlink:to="nn_NoticeOfRedemptionDescription_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_OutstandingSharesPercentage" xlink:href="nn-20210930.xsd#nn_OutstandingSharesPercentage"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_OutstandingSharesPercentage_lbl" xml:lang="en-US">Outstanding shares percentage</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_OutstandingSharesPercentage" xlink:to="nn_OutstandingSharesPercentage_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_CurrentForeignTaxExpenseBenefit" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CurrentForeignTaxExpenseBenefit"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CurrentForeignTaxExpenseBenefit_lbl" xml:lang="en-US">U.S. federal net operating loss</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CurrentForeignTaxExpenseBenefit" xlink:to="us-gaap_CurrentForeignTaxExpenseBenefit_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_TaxCreditCarryforwardValuationAllowance" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TaxCreditCarryforwardValuationAllowance"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_TaxCreditCarryforwardValuationAllowance_lbl" xml:lang="en-US">Change in the valuation allowance</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TaxCreditCarryforwardValuationAllowance" xlink:to="us-gaap_TaxCreditCarryforwardValuationAllowance_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_TaxAdjustmentsSettlementsAndUnusualProvisions" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TaxAdjustmentsSettlementsAndUnusualProvisions"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_TaxAdjustmentsSettlementsAndUnusualProvisions_lbl" xml:lang="en-US">Provision for income taxes</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TaxAdjustmentsSettlementsAndUnusualProvisions" xlink:to="us-gaap_TaxAdjustmentsSettlementsAndUnusualProvisions_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_DeferredTaxAssetsOtherTaxCarryforward" xlink:href="nn-20210930.xsd#nn_DeferredTaxAssetsOtherTaxCarryforward"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_DeferredTaxAssetsOtherTaxCarryforward_lbl" xml:lang="en-US">U.S. NOL carryforwards</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_DeferredTaxAssetsOtherTaxCarryforward" xlink:to="nn_DeferredTaxAssetsOtherTaxCarryforward_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_OtherShortTermBorrowings" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherShortTermBorrowings"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherShortTermBorrowings_lbl" xml:lang="en-US">Borrowings</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherShortTermBorrowings" xlink:to="us-gaap_OtherShortTermBorrowings_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_OtherCommitment" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherCommitment"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherCommitment_lbl" xml:lang="en-US">Agreement total commitment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherCommitment" xlink:to="us-gaap_OtherCommitment_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_IncreaseDecreaseInOperatingAmount" xlink:href="nn-20210930.xsd#nn_IncreaseDecreaseInOperatingAmount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_IncreaseDecreaseInOperatingAmount_lbl" xml:lang="en-US">Increased in operations amount</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_IncreaseDecreaseInOperatingAmount" xlink:to="nn_IncreaseDecreaseInOperatingAmount_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_InterestExpenseDebt" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestExpenseDebt"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InterestExpenseDebt_lbl" xml:lang="en-US">Interest expense</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestExpenseDebt" xlink:to="us-gaap_InterestExpenseDebt_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_AmortizationOfFinancingCostsAndDiscounts" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AmortizationOfFinancingCostsAndDiscounts"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AmortizationOfFinancingCostsAndDiscounts_lbl" xml:lang="en-US">Amortized debt issuance costs</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AmortizationOfFinancingCostsAndDiscounts" xlink:to="us-gaap_AmortizationOfFinancingCostsAndDiscounts_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_FairValueLevel3Hierarchy" xlink:href="nn-20210930.xsd#nn_FairValueLevel3Hierarchy"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_FairValueLevel3Hierarchy_lbl" xml:lang="en-US">Fair value Level 3 hierarchy</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FairValueLevel3Hierarchy" xlink:to="nn_FairValueLevel3Hierarchy_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_UnsecuredConvertibleBridgeAmount" xlink:href="nn-20210930.xsd#nn_UnsecuredConvertibleBridgeAmount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_UnsecuredConvertibleBridgeAmount_lbl" xml:lang="en-US">Unsecured convertible bridge amount</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_UnsecuredConvertibleBridgeAmount" xlink:to="nn_UnsecuredConvertibleBridgeAmount_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xml:lang="en-US">Interes rate</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:to="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ConvertibleNotesPayable" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConvertibleNotesPayable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ConvertibleNotesPayable_lbl" xml:lang="en-US">Convertible notes payable</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConvertibleNotesPayable" xlink:to="us-gaap_ConvertibleNotesPayable_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ConvertDiscount" xlink:href="nn-20210930.xsd#nn_ConvertDiscount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ConvertDiscount_lbl" xml:lang="en-US">Convert discount</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ConvertDiscount" xlink:to="nn_ConvertDiscount_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_OtherLiabilities" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherLiabilities"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherLiabilities_lbl" xml:lang="en-US">Liabilities issuance</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherLiabilities" xlink:to="us-gaap_OtherLiabilities_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_NotesPayable" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NotesPayable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NotesPayable_lbl" xml:lang="en-US">Notes payable</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NotesPayable" xlink:to="us-gaap_NotesPayable_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_AccruedInterest" xlink:href="nn-20210930.xsd#nn_AccruedInterest"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_AccruedInterest_lbl" xml:lang="en-US">Accrued interest</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_AccruedInterest" xlink:to="nn_AccruedInterest_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_IssuedOfFairValue" xlink:href="nn-20210930.xsd#nn_IssuedOfFairValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_IssuedOfFairValue_lbl" xml:lang="en-US">Issued of fair value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_IssuedOfFairValue" xlink:to="nn_IssuedOfFairValue_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_DerivativeIssuanceAmount" xlink:href="nn-20210930.xsd#nn_DerivativeIssuanceAmount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_DerivativeIssuanceAmount_lbl" xml:lang="en-US">Derivative issuance amount</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_DerivativeIssuanceAmount" xlink:to="nn_DerivativeIssuanceAmount_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ExtinguishmentOfDebtAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ExtinguishmentOfDebtAmount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ExtinguishmentOfDebtAmount_lbl" xml:lang="en-US">Extinguishment resulting gain</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ExtinguishmentOfDebtAmount" xlink:to="us-gaap_ExtinguishmentOfDebtAmount_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_GainsLossesOnRestructuringOfDebt" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GainsLossesOnRestructuringOfDebt"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_GainsLossesOnRestructuringOfDebt_lbl" xml:lang="en-US">Gain loss on extinguishment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GainsLossesOnRestructuringOfDebt" xlink:to="us-gaap_GainsLossesOnRestructuringOfDebt_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_DescriptionOfConvertibleLoanCommitments" xlink:href="nn-20210930.xsd#nn_DescriptionOfConvertibleLoanCommitments"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_DescriptionOfConvertibleLoanCommitments_lbl" xml:lang="en-US">Description of convertible loan commitments</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_DescriptionOfConvertibleLoanCommitments" xlink:to="nn_DescriptionOfConvertibleLoanCommitments_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_DebtIssuanceCost" xlink:href="nn-20210930.xsd#nn_DebtIssuanceCost"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_DebtIssuanceCost_lbl" xml:lang="en-US">Debt issuance cost</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_DebtIssuanceCost" xlink:to="nn_DebtIssuanceCost_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_DebtDiscount" xlink:href="nn-20210930.xsd#nn_DebtDiscount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_DebtDiscount_lbl" xml:lang="en-US">Debt discount</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_DebtDiscount" xlink:to="nn_DebtDiscount_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_InterestRatePercentage" xlink:href="nn-20210930.xsd#nn_InterestRatePercentage"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_InterestRatePercentage_lbl" xml:lang="en-US">Interest rate percentage</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_InterestRatePercentage" xlink:to="nn_InterestRatePercentage_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ReferenceRate" xlink:href="nn-20210930.xsd#nn_ReferenceRate"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ReferenceRate_lbl" xml:lang="en-US">Reference rate</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ReferenceRate" xlink:to="nn_ReferenceRate_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_MarginRate" xlink:href="nn-20210930.xsd#nn_MarginRate"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_MarginRate_lbl" xml:lang="en-US">Margin rate</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_MarginRate" xlink:to="nn_MarginRate_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_FairValueOfLoan" xlink:href="nn-20210930.xsd#nn_FairValueOfLoan"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_FairValueOfLoan_lbl" xml:lang="en-US">Fair value of loan</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FairValueOfLoan" xlink:to="nn_FairValueOfLoan_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_PurchaseOfWarrants" xlink:href="nn-20210930.xsd#nn_PurchaseOfWarrants"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_PurchaseOfWarrants_lbl" xml:lang="en-US">Purchase of warrants (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PurchaseOfWarrants" xlink:to="nn_PurchaseOfWarrants_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_FairValueOfWarrantsIssued" xlink:href="nn-20210930.xsd#nn_FairValueOfWarrantsIssued"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_FairValueOfWarrantsIssued_lbl" xml:lang="en-US">Fair value of warrants issued</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FairValueOfWarrantsIssued" xlink:to="nn_FairValueOfWarrantsIssued_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ClassOfWarrantOrRightOutstanding" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ClassOfWarrantOrRightOutstanding"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ClassOfWarrantOrRightOutstanding_lbl" xml:lang="en-US">Warrants to purchase</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightOutstanding" xlink:to="us-gaap_ClassOfWarrantOrRightOutstanding_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_DescriptionOfWarrants_lbl" xml:lang="en-US">Description of warrants</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_DescriptionOfWarrants" xlink:to="nn_DescriptionOfWarrants_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_WarrantsToPurchase" xlink:href="nn-20210930.xsd#nn_WarrantsToPurchase"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_WarrantsToPurchase_lbl" xml:lang="en-US">Warrants to purchase</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WarrantsToPurchase" xlink:to="nn_WarrantsToPurchase_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_PreferredStockDividendRatePercentage" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PreferredStockDividendRatePercentage"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PreferredStockDividendRatePercentage_lbl" xml:lang="en-US">Annual rate</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockDividendRatePercentage" xlink:to="us-gaap_PreferredStockDividendRatePercentage_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_PreferredUnitsCumulativeCashDistributions" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PreferredUnitsCumulativeCashDistributions"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PreferredUnitsCumulativeCashDistributions_lbl" xml:lang="en-US">Preferred units cumulative</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredUnitsCumulativeCashDistributions" xlink:to="us-gaap_PreferredUnitsCumulativeCashDistributions_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_PreferredUnitsDescription" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PreferredUnitsDescription"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PreferredUnitsDescription_lbl" xml:lang="en-US">Preferred Units description</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredUnitsDescription" xlink:to="us-gaap_PreferredUnitsDescription_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_PreferredStockVotingRights" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PreferredStockVotingRights"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PreferredStockVotingRights_lbl" xml:lang="en-US">Preferred stock voting rights description</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockVotingRights" xlink:to="us-gaap_PreferredStockVotingRights_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_PricePerUnits" xlink:href="nn-20210930.xsd#nn_PricePerUnits"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_PricePerUnits_lbl" xml:lang="en-US">Price per units (in Dollars per share)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PricePerUnits" xlink:to="nn_PricePerUnits_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_DebtInstrumentRedemptionDescription" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentRedemptionDescription"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentRedemptionDescription_lbl" xml:lang="en-US">Preferred stock redemption description</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentRedemptionDescription" xlink:to="us-gaap_DebtInstrumentRedemptionDescription_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_CommonUnitsAndConvertiblePreferredUnitsAuthorized" xlink:href="nn-20210930.xsd#nn_CommonUnitsAndConvertiblePreferredUnitsAuthorized"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_CommonUnitsAndConvertiblePreferredUnitsAuthorized_lbl" xml:lang="en-US">Common units and convertible preferred units authorized (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonUnitsAndConvertiblePreferredUnitsAuthorized" xlink:to="nn_CommonUnitsAndConvertiblePreferredUnitsAuthorized_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_PreferredUnitsAuthorized" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PreferredUnitsAuthorized"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PreferredUnitsAuthorized_lbl" xml:lang="en-US">Designated preferred units (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredUnitsAuthorized" xlink:to="us-gaap_PreferredUnitsAuthorized_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_CommonUnitAuthorized" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonUnitAuthorized"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonUnitAuthorized_lbl" xml:lang="en-US">Designated common units (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonUnitAuthorized" xlink:to="us-gaap_CommonUnitAuthorized_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_CashConsideration" xlink:href="nn-20210930.xsd#nn_CashConsideration"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_CashConsideration_lbl" xml:lang="en-US">Cash consideration</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CashConsideration" xlink:to="nn_CashConsideration_lbl"/>
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    <loc xlink:type="locator" xlink:label="nn_EquipmentTerm" xlink:href="nn-20210930.xsd#nn_EquipmentTerm"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_EquipmentTerm_lbl" xml:lang="en-US">Equipment term</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_EquipmentTerm" xlink:to="nn_EquipmentTerm_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_TerminationTerm" xlink:href="nn-20210930.xsd#nn_TerminationTerm"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_TerminationTerm_lbl" xml:lang="en-US">Termination term</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_TerminationTerm" xlink:to="nn_TerminationTerm_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_SaleleasebackFinancingMethod" xlink:href="nn-20210930.xsd#nn_SaleleasebackFinancingMethod"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_SaleleasebackFinancingMethod_lbl" xml:lang="en-US">Sale-leaseback financing method</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SaleleasebackFinancingMethod" xlink:to="nn_SaleleasebackFinancingMethod_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_MinimumLeasePaymentsSaleLeasebackTransactions" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MinimumLeasePaymentsSaleLeasebackTransactions"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MinimumLeasePaymentsSaleLeasebackTransactions_lbl" xml:lang="en-US">Minimum lease payments</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MinimumLeasePaymentsSaleLeasebackTransactions" xlink:to="us-gaap_MinimumLeasePaymentsSaleLeasebackTransactions_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_StockPurchase" xlink:href="nn-20210930.xsd#nn_StockPurchase"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_StockPurchase_lbl" xml:lang="en-US">Stock purchase (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StockPurchase" xlink:to="nn_StockPurchase_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_GrantedAdditionalWarrantsToPurchase" xlink:href="nn-20210930.xsd#nn_GrantedAdditionalWarrantsToPurchase"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_GrantedAdditionalWarrantsToPurchase_lbl" xml:lang="en-US">Granted additional warrants to purchase stock (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_GrantedAdditionalWarrantsToPurchase" xlink:to="nn_GrantedAdditionalWarrantsToPurchase_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_WarrantIssued" xlink:href="nn-20210930.xsd#nn_WarrantIssued"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_WarrantIssued_lbl" xml:lang="en-US">Warrant issued (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WarrantIssued" xlink:to="nn_WarrantIssued_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ATTWarrantsVestedPercentage" xlink:href="nn-20210930.xsd#nn_ATTWarrantsVestedPercentage"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ATTWarrantsVestedPercentage_lbl" xml:lang="en-US">AT&amp;T Warrants vested percentage</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ATTWarrantsVestedPercentage" xlink:to="nn_ATTWarrantsVestedPercentage_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_WarrantsExpireTerm" xlink:href="nn-20210930.xsd#nn_WarrantsExpireTerm"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_WarrantsExpireTerm_lbl" xml:lang="en-US">Warrants expire term</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WarrantsExpireTerm" xlink:to="nn_WarrantsExpireTerm_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_AssetsFairValueAdjustment" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsFairValueAdjustment"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AssetsFairValueAdjustment_lbl" xml:lang="en-US">Fair value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsFairValueAdjustment" xlink:to="us-gaap_AssetsFairValueAdjustment_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentOwnedAccumulatedDepreciation" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentOwnedAccumulatedDepreciation"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PropertyPlantAndEquipmentOwnedAccumulatedDepreciation_lbl" xml:lang="en-US">Depreciation expense on property and equipment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentOwnedAccumulatedDepreciation" xlink:to="us-gaap_PropertyPlantAndEquipmentOwnedAccumulatedDepreciation_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentExcludingLessorAssetUnderOperatingLeaseAccumulatedDepreciation" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentExcludingLessorAssetUnderOperatingLeaseAccumulatedDepreciation"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PropertyPlantAndEquipmentExcludingLessorAssetUnderOperatingLeaseAccumulatedDepreciation_lbl" xml:lang="en-US">Total balances</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentExcludingLessorAssetUnderOperatingLeaseAccumulatedDepreciation" xlink:to="us-gaap_PropertyPlantAndEquipmentExcludingLessorAssetUnderOperatingLeaseAccumulatedDepreciation_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_GainLossOnDispositionOfAssets" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GainLossOnDispositionOfAssets"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_GainLossOnDispositionOfAssets_lbl" xml:lang="en-US">Loss on disposal of equipment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GainLossOnDispositionOfAssets" xlink:to="us-gaap_GainLossOnDispositionOfAssets_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_DeferredCompensationArrangementWithIndividualSharesAuthorizedForIssuance" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredCompensationArrangementWithIndividualSharesAuthorizedForIssuance"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DeferredCompensationArrangementWithIndividualSharesAuthorizedForIssuance_lbl" xml:lang="en-US">Authorized for issuance (in Shares)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredCompensationArrangementWithIndividualSharesAuthorizedForIssuance" xlink:to="us-gaap_DeferredCompensationArrangementWithIndividualSharesAuthorizedForIssuance_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionModificationOfTermsIncrementalCompensationCost" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionModificationOfTermsIncrementalCompensationCost"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionModificationOfTermsIncrementalCompensationCost_lbl" xml:lang="en-US">Incremental compensation cost</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionModificationOfTermsIncrementalCompensationCost" xlink:to="us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionModificationOfTermsIncrementalCompensationCost_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_UnitOptionExercisableAndExpectedToVest" xlink:href="nn-20210930.xsd#nn_UnitOptionExercisableAndExpectedToVest"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_UnitOptionExercisableAndExpectedToVest_lbl" xml:lang="en-US">Unit options exercisable and expected to vest</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_UnitOptionExercisableAndExpectedToVest" xlink:to="nn_UnitOptionExercisableAndExpectedToVest_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_UnitOptionExercisable" xlink:href="nn-20210930.xsd#nn_UnitOptionExercisable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_UnitOptionExercisable_lbl" xml:lang="en-US">Unit options exercisable</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_UnitOptionExercisable" xlink:to="nn_UnitOptionExercisable_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_WeightedAverageGrantDateFairValueOfUnitOptionsGranted" xlink:href="nn-20210930.xsd#nn_WeightedAverageGrantDateFairValueOfUnitOptionsGranted"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_WeightedAverageGrantDateFairValueOfUnitOptionsGranted_lbl" xml:lang="en-US">Weighted average grant date fair value of unit options granted</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WeightedAverageGrantDateFairValueOfUnitOptionsGranted" xlink:to="nn_WeightedAverageGrantDateFairValueOfUnitOptionsGranted_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_IntrinsicValueOfUnitOptionsExercised" xlink:href="nn-20210930.xsd#nn_IntrinsicValueOfUnitOptionsExercised"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_IntrinsicValueOfUnitOptionsExercised_lbl" xml:lang="en-US">Intrinsic value of unit options exercised</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_IntrinsicValueOfUnitOptionsExercised" xlink:to="nn_IntrinsicValueOfUnitOptionsExercised_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_TotalFairValueOfOptionsVested" xlink:href="nn-20210930.xsd#nn_TotalFairValueOfOptionsVested"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_TotalFairValueOfOptionsVested_lbl" xml:lang="en-US">Total fair value of options vested</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_TotalFairValueOfOptionsVested" xlink:to="nn_TotalFairValueOfOptionsVested_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_lbl" xml:lang="en-US">Total compensation cost related to nonvested awards not yet recognized</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:to="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_WeightedaveragedPeriodOver" xlink:href="nn-20210930.xsd#nn_WeightedaveragedPeriodOver"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_WeightedaveragedPeriodOver_lbl" xml:lang="en-US">Weighted-average period over</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WeightedaveragedPeriodOver" xlink:to="nn_WeightedaveragedPeriodOver_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_WeightedAverageGrantDateFairValueOfProfitsInterestUnitsGranted" xlink:href="nn-20210930.xsd#nn_WeightedAverageGrantDateFairValueOfProfitsInterestUnitsGranted"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_WeightedAverageGrantDateFairValueOfProfitsInterestUnitsGranted_lbl" xml:lang="en-US">Weighted average grant date fair value of profits interest units granted</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WeightedAverageGrantDateFairValueOfProfitsInterestUnitsGranted" xlink:to="nn_WeightedAverageGrantDateFairValueOfProfitsInterestUnitsGranted_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_TotalFairValueOfUnitsVested" xlink:href="nn-20210930.xsd#nn_TotalFairValueOfUnitsVested"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_TotalFairValueOfUnitsVested_lbl" xml:lang="en-US">Total fair value of units vested</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_TotalFairValueOfUnitsVested" xlink:to="nn_TotalFairValueOfUnitsVested_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_TotalCompensationCostRelatedToNonvestedProfitsInterestUnits" xlink:href="nn-20210930.xsd#nn_TotalCompensationCostRelatedToNonvestedProfitsInterestUnits"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_TotalCompensationCostRelatedToNonvestedProfitsInterestUnits_lbl" xml:lang="en-US">Total compensation cost related to nonvested profits interest units</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_TotalCompensationCostRelatedToNonvestedProfitsInterestUnits" xlink:to="nn_TotalCompensationCostRelatedToNonvestedProfitsInterestUnits_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_WeightedaveragePeriodOver" xlink:href="nn-20210930.xsd#nn_WeightedaveragePeriodOver"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_WeightedaveragePeriodOver_lbl" xml:lang="en-US">Weighted-average period over</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WeightedaveragePeriodOver" xlink:to="nn_WeightedaveragePeriodOver_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_EquityBasedCompensationExpense" xlink:href="nn-20210930.xsd#nn_EquityBasedCompensationExpense"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_EquityBasedCompensationExpense_lbl" xml:lang="en-US">Equity based compensation expense</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_EquityBasedCompensationExpense" xlink:to="nn_EquityBasedCompensationExpense_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_GrantDateFairValue" xlink:href="nn-20210930.xsd#nn_GrantDateFairValue"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_GrantDateFairValue_lbl" xml:lang="en-US">Grant date fair value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_GrantDateFairValue" xlink:to="nn_GrantDateFairValue_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_TotalFairValueOfUnitsVestedUponGrantAndVested" xlink:href="nn-20210930.xsd#nn_TotalFairValueOfUnitsVestedUponGrantAndVested"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_TotalFairValueOfUnitsVestedUponGrantAndVested_lbl" xml:lang="en-US">Total fair value of units vested upon grant and vested</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_TotalFairValueOfUnitsVestedUponGrantAndVested" xlink:to="nn_TotalFairValueOfUnitsVestedUponGrantAndVested_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_DeferredCompensationEquity" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredCompensationEquity"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DeferredCompensationEquity_lbl" xml:lang="en-US">Total compensation cost</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredCompensationEquity" xlink:to="us-gaap_DeferredCompensationEquity_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_PercentageOfWeightedAverageCostInventory" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PercentageOfWeightedAverageCostInventory"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PercentageOfWeightedAverageCostInventory_lbl" xml:lang="en-US">Weighted average cost of capital</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PercentageOfWeightedAverageCostInventory" xlink:to="us-gaap_PercentageOfWeightedAverageCostInventory_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum_lbl" xml:lang="en-US">Risk-free interest rate,percentage</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_BasedOnComparableCompaniesPubliclyTradedCommonStockPricesAndTheCapitalStructure" xlink:href="nn-20210930.xsd#nn_BasedOnComparableCompaniesPubliclyTradedCommonStockPricesAndTheCapitalStructure"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_BasedOnComparableCompaniesPubliclyTradedCommonStockPricesAndTheCapitalStructure_lbl" xml:lang="en-US">Percentage of traded common stock prices and the capital structure</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_BasedOnComparableCompaniesPubliclyTradedCommonStockPricesAndTheCapitalStructure" xlink:to="nn_BasedOnComparableCompaniesPubliclyTradedCommonStockPricesAndTheCapitalStructure_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount_lbl" xml:lang="en-US">Discretionary contributions totaling</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount" xlink:to="us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_RevenueRecognitionPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueRecognitionPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RevenueRecognitionPolicyTextBlock_lbl" xml:lang="en-US">Revenue</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevenueRecognitionPolicyTextBlock" xlink:to="us-gaap_RevenueRecognitionPolicyTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_CompensationRelatedCostsPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CompensationRelatedCostsPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CompensationRelatedCostsPolicyTextBlock_lbl" xml:lang="en-US">Equity-Based Compensation</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CompensationRelatedCostsPolicyTextBlock" xlink:to="us-gaap_CompensationRelatedCostsPolicyTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_BasicAndDilutedNetLossPerCommonUnitTextBlock" xlink:href="nn-20210930.xsd#nn_BasicAndDilutedNetLossPerCommonUnitTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_BasicAndDilutedNetLossPerCommonUnitTextBlock_lbl" xml:lang="en-US">Basic and Diluted Net Loss per Common Unit</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_BasicAndDilutedNetLossPerCommonUnitTextBlock" xlink:to="nn_BasicAndDilutedNetLossPerCommonUnitTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_SegmentReportingPolicyPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentReportingPolicyPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SegmentReportingPolicyPolicyTextBlock_lbl" xml:lang="en-US">Segments</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SegmentReportingPolicyPolicyTextBlock" xlink:to="us-gaap_SegmentReportingPolicyPolicyTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock_lbl" xml:lang="en-US">Foreign Currency Translation</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock" xlink:to="us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_CashAndCashEquivalentsPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashAndCashEquivalentsPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CashAndCashEquivalentsPolicyTextBlock_lbl" xml:lang="en-US">Cash and Cash Equivalents</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsPolicyTextBlock" xlink:to="us-gaap_CashAndCashEquivalentsPolicyTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_RestrictedCashPolicyTextBlock" xlink:href="nn-20210930.xsd#nn_RestrictedCashPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_RestrictedCashPolicyTextBlock_lbl" xml:lang="en-US">Restricted Cash</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_RestrictedCashPolicyTextBlock" xlink:to="nn_RestrictedCashPolicyTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_lbl" xml:lang="en-US">Property and Equipment and Network under Construction</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock" xlink:to="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_SoftwareDevelopmentCostsPolicyTextBlock" xlink:href="nn-20210930.xsd#nn_SoftwareDevelopmentCostsPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_SoftwareDevelopmentCostsPolicyTextBlock_lbl" xml:lang="en-US">Software Development Costs</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SoftwareDevelopmentCostsPolicyTextBlock" xlink:to="nn_SoftwareDevelopmentCostsPolicyTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock_lbl" xml:lang="en-US">Long Lived Assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock" xlink:to="us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_CostOfSalesPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CostOfSalesPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CostOfSalesPolicyTextBlock_lbl" xml:lang="en-US">Cost of Goods Sold</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CostOfSalesPolicyTextBlock" xlink:to="us-gaap_CostOfSalesPolicyTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ResearchAndDevelopmentExpensePolicy" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ResearchAndDevelopmentExpensePolicy"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ResearchAndDevelopmentExpensePolicy_lbl" xml:lang="en-US">Research and Development Costs</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ResearchAndDevelopmentExpensePolicy" xlink:to="us-gaap_ResearchAndDevelopmentExpensePolicy_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_IncomeTaxPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeTaxPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncomeTaxPolicyTextBlock_lbl" xml:lang="en-US">Income Taxes</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxPolicyTextBlock" xlink:to="us-gaap_IncomeTaxPolicyTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_IndefiniteLivedIntangibleAssetsTextBlock" xlink:href="nn-20210930.xsd#nn_IndefiniteLivedIntangibleAssetsTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_IndefiniteLivedIntangibleAssetsTextBlock_lbl" xml:lang="en-US">Indefinite-Lived Intangible assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_IndefiniteLivedIntangibleAssetsTextBlock" xlink:to="nn_IndefiniteLivedIntangibleAssetsTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_BasisOfAccountingPolicyPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BasisOfAccountingPolicyPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_BasisOfAccountingPolicyPolicyTextBlock_lbl" xml:lang="en-US">Basis of Presentation</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BasisOfAccountingPolicyPolicyTextBlock" xlink:to="us-gaap_BasisOfAccountingPolicyPolicyTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_UseOfEstimates" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_UseOfEstimates"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_UseOfEstimates_lbl" xml:lang="en-US">Use of Estimates</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UseOfEstimates" xlink:to="us-gaap_UseOfEstimates_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_AdoptedAccountingPronouncementsTextBlock" xlink:href="nn-20210930.xsd#nn_AdoptedAccountingPronouncementsTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_AdoptedAccountingPronouncementsTextBlock_lbl" xml:lang="en-US">Adopted Accounting Pronouncements</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_AdoptedAccountingPronouncementsTextBlock" xlink:to="nn_AdoptedAccountingPronouncementsTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl" xml:lang="en-US">Recent Accounting Pronouncements</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:to="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock_lbl" xml:lang="en-US">Basis of Presentation</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock" xlink:to="us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_WarrantLiabilityPolicyTextBlock" xlink:href="nn-20210930.xsd#nn_WarrantLiabilityPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_WarrantLiabilityPolicyTextBlock_lbl" xml:lang="en-US">Warrant Liability</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WarrantLiabilityPolicyTextBlock" xlink:to="nn_WarrantLiabilityPolicyTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_InvestmentPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InvestmentPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InvestmentPolicyTextBlock_lbl" xml:lang="en-US">Investment Held in Trust Account</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentPolicyTextBlock" xlink:to="us-gaap_InvestmentPolicyTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_FairValueMeasurementPolicyPolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementPolicyPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FairValueMeasurementPolicyPolicyTextBlock_lbl" xml:lang="en-US">Fair Value Measurements</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementPolicyPolicyTextBlock" xlink:to="us-gaap_FairValueMeasurementPolicyPolicyTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ConcentrationRiskCreditRisk" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ConcentrationRiskCreditRisk"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ConcentrationRiskCreditRisk_lbl" xml:lang="en-US">Concentration of Credit Risk</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConcentrationRiskCreditRisk" xlink:to="us-gaap_ConcentrationRiskCreditRisk_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_CommonStockSubjectToPossibleRedemptionPolicyTextBlock" xlink:href="nn-20210930.xsd#nn_CommonStockSubjectToPossibleRedemptionPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_CommonStockSubjectToPossibleRedemptionPolicyTextBlock_lbl" xml:lang="en-US">Common Stock Subject to Possible Redemption</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonStockSubjectToPossibleRedemptionPolicyTextBlock" xlink:to="nn_CommonStockSubjectToPossibleRedemptionPolicyTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_EarningsPerSharePolicyTextBlock" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EarningsPerSharePolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EarningsPerSharePolicyTextBlock_lbl" xml:lang="en-US">Net Loss Per Common Share</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerSharePolicyTextBlock" xlink:to="us-gaap_EarningsPerSharePolicyTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_OfferingCostsPolicyTextBlock" xlink:href="nn-20210930.xsd#nn_OfferingCostsPolicyTextBlock"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_OfferingCostsPolicyTextBlock_lbl" xml:lang="en-US">Offering Costs</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_OfferingCostsPolicyTextBlock" xlink:to="nn_OfferingCostsPolicyTextBlock_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_PIPESharesMember" xlink:href="nn-20210930.xsd#nn_PIPESharesMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_PIPESharesMember_lbl" xml:lang="en-US">PIPE Shares [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PIPESharesMember" xlink:to="nn_PIPESharesMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_PIPEInvestmentMember" xlink:href="nn-20210930.xsd#nn_PIPEInvestmentMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_PIPEInvestmentMember_lbl" xml:lang="en-US">PIPE Investment [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PIPEInvestmentMember" xlink:to="nn_PIPEInvestmentMember_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_IPOMember" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IPOMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IPOMember_lbl" xml:lang="en-US">IPO [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IPOMember" xlink:to="us-gaap_IPOMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_SponsorMember" xlink:href="nn-20210930.xsd#nn_SponsorMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_SponsorMember_lbl" xml:lang="en-US">Sponsor [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SponsorMember" xlink:to="nn_SponsorMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_NextNavMember" xlink:href="nn-20210930.xsd#nn_NextNavMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_NextNavMember_lbl" xml:lang="en-US">NextNav [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_NextNavMember" xlink:to="nn_NextNavMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ClassCRedeemablePreferredUnitsMember" xlink:href="nn-20210930.xsd#nn_ClassCRedeemablePreferredUnitsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ClassCRedeemablePreferredUnitsMember_lbl" xml:lang="en-US">Class C Redeemable Preferred Units [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ClassCRedeemablePreferredUnitsMember" xlink:to="nn_ClassCRedeemablePreferredUnitsMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ClassDRedeemablePreferredUnitsMember" xlink:href="nn-20210930.xsd#nn_ClassDRedeemablePreferredUnitsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ClassDRedeemablePreferredUnitsMember_lbl" xml:lang="en-US">Class D Redeemable Preferred Units [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ClassDRedeemablePreferredUnitsMember" xlink:to="nn_ClassDRedeemablePreferredUnitsMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ClassA1CommonUnitsMember" xlink:href="nn-20210930.xsd#nn_ClassA1CommonUnitsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ClassA1CommonUnitsMember_lbl" xml:lang="en-US">Class A-1 Common Units [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ClassA1CommonUnitsMember" xlink:to="nn_ClassA1CommonUnitsMember_lbl"/>
    <loc xlink:type="locator" xlink:label="srt_BoardOfDirectorsChairmanMember" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_BoardOfDirectorsChairmanMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="srt_BoardOfDirectorsChairmanMember_lbl" xml:lang="en-US">Board of Directors Chairman [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_BoardOfDirectorsChairmanMember" xlink:to="srt_BoardOfDirectorsChairmanMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_CustomerThreeMember" xlink:href="nn-20210930.xsd#nn_CustomerThreeMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_CustomerThreeMember_lbl" xml:lang="en-US">Customer three [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CustomerThreeMember" xlink:to="nn_CustomerThreeMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_CustomerOneMember" xlink:href="nn-20210930.xsd#nn_CustomerOneMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_CustomerOneMember_lbl" xml:lang="en-US">Customer One [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CustomerOneMember" xlink:to="nn_CustomerOneMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_CustomerTwoMember" xlink:href="nn-20210930.xsd#nn_CustomerTwoMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_CustomerTwoMember_lbl" xml:lang="en-US">Customer Two [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CustomerTwoMember" xlink:to="nn_CustomerTwoMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_PrivatePlacementWarrantsOutstandingMember" xlink:href="nn-20210930.xsd#nn_PrivatePlacementWarrantsOutstandingMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_PrivatePlacementWarrantsOutstandingMember_lbl" xml:lang="en-US">Private Placement Warrants outstanding [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PrivatePlacementWarrantsOutstandingMember" xlink:to="nn_PrivatePlacementWarrantsOutstandingMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_OfferingCostsMember" xlink:href="nn-20210930.xsd#nn_OfferingCostsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_OfferingCostsMember_lbl" xml:lang="en-US">Offering Costs [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_OfferingCostsMember" xlink:to="nn_OfferingCostsMember_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_SubsequentEventMember" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SubsequentEventMember_lbl" xml:lang="en-US">Subsequent Event [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventMember" xlink:to="us-gaap_SubsequentEventMember_lbl"/>
    <loc xlink:type="locator" xlink:label="srt_ScenarioForecastMember" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ScenarioForecastMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="srt_ScenarioForecastMember_lbl" xml:lang="en-US">Forecast [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ScenarioForecastMember" xlink:to="srt_ScenarioForecastMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_FounderShareMember" xlink:href="nn-20210930.xsd#nn_FounderShareMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_FounderShareMember_lbl" xml:lang="en-US">Founder Shares [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FounderShareMember" xlink:to="nn_FounderShareMember_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="nn_FounderShareMember_lbl0" xml:lang="en-US">Founder Share [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FounderShareMember" xlink:to="nn_FounderShareMember_lbl0"/>
    <loc xlink:type="locator" xlink:label="nn_FounderSharesMember" xlink:href="nn-20210930.xsd#nn_FounderSharesMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_FounderSharesMember_lbl" xml:lang="en-US">Founder Shares [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FounderSharesMember" xlink:to="nn_FounderSharesMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_TwoThousandAndEighteenNoteMember" xlink:href="nn-20210930.xsd#nn_TwoThousandAndEighteenNoteMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_TwoThousandAndEighteenNoteMember_lbl" xml:lang="en-US">2018 Notes [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_TwoThousandAndEighteenNoteMember" xlink:to="nn_TwoThousandAndEighteenNoteMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_TwoThousandNineteenNoteMember" xlink:href="nn-20210930.xsd#nn_TwoThousandNineteenNoteMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_TwoThousandNineteenNoteMember_lbl" xml:lang="en-US">2019 Notes [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_TwoThousandNineteenNoteMember" xlink:to="nn_TwoThousandNineteenNoteMember_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_SeriesDPreferredStockMember" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SeriesDPreferredStockMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SeriesDPreferredStockMember_lbl" xml:lang="en-US">Series D Preferred Stock [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SeriesDPreferredStockMember" xlink:to="us-gaap_SeriesDPreferredStockMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_FortressFinancingAgreementMember" xlink:href="nn-20210930.xsd#nn_FortressFinancingAgreementMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_FortressFinancingAgreementMember_lbl" xml:lang="en-US">Fortress Financing Agreement [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FortressFinancingAgreementMember" xlink:to="nn_FortressFinancingAgreementMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_PIKInterestMember" xlink:href="nn-20210930.xsd#nn_PIKInterestMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_PIKInterestMember_lbl" xml:lang="en-US">PIK interest [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PIKInterestMember" xlink:to="nn_PIKInterestMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_LIBORLoansMember" xlink:href="nn-20210930.xsd#nn_LIBORLoansMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_LIBORLoansMember_lbl" xml:lang="en-US">LIBOR loans [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_LIBORLoansMember" xlink:to="nn_LIBORLoansMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ClassDRedeemablePreferredStockMember" xlink:href="nn-20210930.xsd#nn_ClassDRedeemablePreferredStockMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_ClassDRedeemablePreferredStockMember_lbl" xml:lang="en-US">Class D Redeemable Preferred Stock [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ClassDRedeemablePreferredStockMember" xlink:to="nn_ClassDRedeemablePreferredStockMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_B4sMember" xlink:href="nn-20210930.xsd#nn_B4sMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="nn_B4sMember_lbl" xml:lang="en-US">B-4s [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_B4sMember" xlink:to="nn_B4sMember_lbl"/>
    <loc xlink:type="locator" xlink:label="srt_ConsolidatedEntitiesDomain" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ConsolidatedEntitiesDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="srt_ConsolidatedEntitiesDomain_lbl" xml:lang="en-US">Consolidated Entities [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ConsolidatedEntitiesDomain" xlink:to="srt_ConsolidatedEntitiesDomain_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ClassOfStockDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ClassOfStockDomain_lbl" xml:lang="en-US">Class of Stock [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="us-gaap_ClassOfStockDomain_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_EquityComponentDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EquityComponentDomain_lbl" xml:lang="en-US">Equity Component [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityComponentDomain" xlink:to="us-gaap_EquityComponentDomain_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_OrganizationandBusinessOperationsTable" xlink:href="nn-20210930.xsd#nn_OrganizationandBusinessOperationsTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_OrganizationandBusinessOperationsTable_lbl" xml:lang="en-US">Organization and Business Operations [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_OrganizationandBusinessOperationsTable" xlink:to="nn_OrganizationandBusinessOperationsTable_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_OrganizationandBusinessOperationsLineItems" xlink:href="nn-20210930.xsd#nn_OrganizationandBusinessOperationsLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_OrganizationandBusinessOperationsLineItems_lbl" xml:lang="en-US">Organization and Business Operations [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_OrganizationandBusinessOperationsLineItems" xlink:to="nn_OrganizationandBusinessOperationsLineItems_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_SummaryofSignificantAccountingPoliciesTable_lbl" xml:lang="en-US">Summary of Significant Accounting Policies [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SummaryofSignificantAccountingPoliciesTable" xlink:to="nn_SummaryofSignificantAccountingPoliciesTable_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_SummaryofSignificantAccountingPoliciesLineItems_lbl" xml:lang="en-US">Summary of Significant Accounting Policies [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SummaryofSignificantAccountingPoliciesLineItems" xlink:to="nn_SummaryofSignificantAccountingPoliciesLineItems_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_CommonStockTable_lbl" xml:lang="en-US">Common Stock [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonStockTable" xlink:to="nn_CommonStockTable_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_CommonStockLineItems" xlink:href="nn-20210930.xsd#nn_CommonStockLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_CommonStockLineItems_lbl" xml:lang="en-US">Common Stock [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonStockLineItems" xlink:to="nn_CommonStockLineItems_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_SubsequentEventsTable_lbl" xml:lang="en-US">Subsequent Events [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SubsequentEventsTable" xlink:to="nn_SubsequentEventsTable_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_SubsequentEventsLineItems_lbl" xml:lang="en-US">Subsequent Events [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SubsequentEventsLineItems" xlink:to="nn_SubsequentEventsLineItems_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_PrivatePlacementWarrantsTable" xlink:href="nn-20210930.xsd#nn_PrivatePlacementWarrantsTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_PrivatePlacementWarrantsTable_lbl" xml:lang="en-US">Private Placement Warrants [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PrivatePlacementWarrantsTable" xlink:to="nn_PrivatePlacementWarrantsTable_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_PrivatePlacementWarrantsLineItems_lbl" xml:lang="en-US">Private Placement Warrants [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PrivatePlacementWarrantsLineItems" xlink:to="nn_PrivatePlacementWarrantsLineItems_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_RelatedPartyTransactionsTable" xlink:href="nn-20210930.xsd#nn_RelatedPartyTransactionsTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_RelatedPartyTransactionsTable_lbl" xml:lang="en-US">Related Party Transactions [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_RelatedPartyTransactionsTable" xlink:to="nn_RelatedPartyTransactionsTable_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_RelatedPartyTransactionsLineItems_lbl" xml:lang="en-US">Related Party Transactions [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_RelatedPartyTransactionsLineItems" xlink:to="nn_RelatedPartyTransactionsLineItems_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_InvestmentHeldinTrustAccountTable" xlink:href="nn-20210930.xsd#nn_InvestmentHeldinTrustAccountTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_InvestmentHeldinTrustAccountTable_lbl" xml:lang="en-US">Investment Held in Trust Account [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_InvestmentHeldinTrustAccountTable" xlink:to="nn_InvestmentHeldinTrustAccountTable_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_InvestmentHeldinTrustAccountLineItems" xlink:href="nn-20210930.xsd#nn_InvestmentHeldinTrustAccountLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_InvestmentHeldinTrustAccountLineItems_lbl" xml:lang="en-US">Investment Held in Trust Account [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_InvestmentHeldinTrustAccountLineItems" xlink:to="nn_InvestmentHeldinTrustAccountLineItems_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_CommitmentsandContingenciesTable_lbl" xml:lang="en-US">Commitments and Contingencies [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommitmentsandContingenciesTable" xlink:to="nn_CommitmentsandContingenciesTable_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_CommitmentsandContingenciesLineItems" xlink:href="nn-20210930.xsd#nn_CommitmentsandContingenciesLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_CommitmentsandContingenciesLineItems_lbl" xml:lang="en-US">Commitments and Contingencies [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommitmentsandContingenciesLineItems" xlink:to="nn_CommitmentsandContingenciesLineItems_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_StockholdersEquityTable" xlink:href="nn-20210930.xsd#nn_StockholdersEquityTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_StockholdersEquityTable_lbl" xml:lang="en-US">Stockholders&#8217; Equity [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StockholdersEquityTable" xlink:to="nn_StockholdersEquityTable_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_StockholdersEquityLineItems_lbl" xml:lang="en-US">Stockholders&#8217; Equity [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StockholdersEquityLineItems" xlink:to="nn_StockholdersEquityLineItems_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_RestatementofPreviouslyIssuedFinancialStatementsTable_lbl" xml:lang="en-US">Restatement of Previously Issued Financial Statements [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_RestatementofPreviouslyIssuedFinancialStatementsTable" xlink:to="nn_RestatementofPreviouslyIssuedFinancialStatementsTable_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_RestatementofPreviouslyIssuedFinancialStatementsLineItems_lbl" xml:lang="en-US">Restatement of Previously Issued Financial Statements [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_RestatementofPreviouslyIssuedFinancialStatementsLineItems" xlink:to="nn_RestatementofPreviouslyIssuedFinancialStatementsLineItems_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_IncomeTaxTable_lbl" xml:lang="en-US">Income Tax [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_IncomeTaxTable" xlink:to="nn_IncomeTaxTable_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_IncomeTaxLineItems_lbl" xml:lang="en-US">Income Tax [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_IncomeTaxLineItems" xlink:to="nn_IncomeTaxLineItems_lbl"/>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WarrantsandWarrantLiabilityTable" xlink:to="nn_WarrantsandWarrantLiabilityTable_lbl"/>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WarrantsandWarrantLiabilityLineItems" xlink:to="nn_WarrantsandWarrantLiabilityLineItems_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherAssetsAbstract_lbl" xml:lang="en-US">Other Current Assets [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAssetsAbstract" xlink:to="us-gaap_OtherAssetsAbstract_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_AccountingPoliciesbyPolicyPoliciesTable_lbl" xml:lang="en-US">Accounting Policies, by Policy (Policies) [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_AccountingPoliciesbyPolicyPoliciesTable" xlink:to="nn_AccountingPoliciesbyPolicyPoliciesTable_lbl"/>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_AccountingPoliciesbyPolicyPoliciesLineItems" xlink:to="nn_AccountingPoliciesbyPolicyPoliciesLineItems_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_SummaryofSignificantAccountingPoliciesTablesTable_lbl" xml:lang="en-US">Summary of Significant Accounting Policies (Tables) [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SummaryofSignificantAccountingPoliciesTablesTable" xlink:to="nn_SummaryofSignificantAccountingPoliciesTablesTable_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_SummaryofSignificantAccountingPoliciesTablesLineItems_lbl" xml:lang="en-US">Summary of Significant Accounting Policies (Tables) [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SummaryofSignificantAccountingPoliciesTablesLineItems" xlink:to="nn_SummaryofSignificantAccountingPoliciesTablesLineItems_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_InvestmentHeldinTrustAccountTablesTable_lbl" xml:lang="en-US">Investment Held in Trust Account (Tables) [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_InvestmentHeldinTrustAccountTablesTable" xlink:to="nn_InvestmentHeldinTrustAccountTablesTable_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_InvestmentHeldinTrustAccountTablesLineItems" xlink:href="nn-20210930.xsd#nn_InvestmentHeldinTrustAccountTablesLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_InvestmentHeldinTrustAccountTablesLineItems_lbl" xml:lang="en-US">Investment Held in Trust Account (Tables) [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_InvestmentHeldinTrustAccountTablesLineItems" xlink:to="nn_InvestmentHeldinTrustAccountTablesLineItems_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_RestatementofPreviouslyIssuedFinancialStatementsTablesTable" xlink:href="nn-20210930.xsd#nn_RestatementofPreviouslyIssuedFinancialStatementsTablesTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_RestatementofPreviouslyIssuedFinancialStatementsTablesTable_lbl" xml:lang="en-US">Restatement of Previously Issued Financial Statements (Tables) [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_RestatementofPreviouslyIssuedFinancialStatementsTablesTable" xlink:to="nn_RestatementofPreviouslyIssuedFinancialStatementsTablesTable_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_RestatementofPreviouslyIssuedFinancialStatementsTablesLineItems" xlink:href="nn-20210930.xsd#nn_RestatementofPreviouslyIssuedFinancialStatementsTablesLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_RestatementofPreviouslyIssuedFinancialStatementsTablesLineItems_lbl" xml:lang="en-US">Restatement of Previously Issued Financial Statements (Tables) [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_RestatementofPreviouslyIssuedFinancialStatementsTablesLineItems" xlink:to="nn_RestatementofPreviouslyIssuedFinancialStatementsTablesLineItems_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_IncomeTaxTablesTable" xlink:href="nn-20210930.xsd#nn_IncomeTaxTablesTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_IncomeTaxTablesTable_lbl" xml:lang="en-US">Income Tax (Tables) [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_IncomeTaxTablesTable" xlink:to="nn_IncomeTaxTablesTable_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_IncomeTaxTablesLineItems" xlink:href="nn-20210930.xsd#nn_IncomeTaxTablesLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_IncomeTaxTablesLineItems_lbl" xml:lang="en-US">Income Tax (Tables) [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_IncomeTaxTablesLineItems" xlink:to="nn_IncomeTaxTablesLineItems_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl" xml:lang="en-US">Fair Value Hierarchy and NAV [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:to="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl"/>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_EquityBasedCompensationDetailsScheduleofdistributionhurdlesperunitforProfitsInterestUnitsoutstandingTable" xlink:to="nn_EquityBasedCompensationDetailsScheduleofdistributionhurdlesperunitforProfitsInterestUnitsoutstandingTable_lbl"/>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_EquityBasedCompensationDetailsScheduleofdistributionhurdlesperunitforProfitsInterestUnitsoutstandingLineItems" xlink:to="nn_EquityBasedCompensationDetailsScheduleofdistributionhurdlesperunitforProfitsInterestUnitsoutstandingLineItems_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="srt_OwnershipDomain_lbl" xml:lang="en-US">Ownership [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_OwnershipDomain" xlink:to="srt_OwnershipDomain_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="srt_NameOfMajorCustomerDomain_lbl" xml:lang="en-US">Customer [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_NameOfMajorCustomerDomain" xlink:to="srt_NameOfMajorCustomerDomain_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RelatedPartyDomain_lbl" xml:lang="en-US">Related Party [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="us-gaap_RelatedPartyDomain_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_PIPEDomain" xlink:href="nn-20210930.xsd#nn_PIPEDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_PIPEDomain_lbl" xml:lang="en-US">PIPE [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PIPEDomain" xlink:to="nn_PIPEDomain_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_OrganizationandBusinessOperationsDetailsTable" xlink:href="nn-20210930.xsd#nn_OrganizationandBusinessOperationsDetailsTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_OrganizationandBusinessOperationsDetailsTable_lbl" xml:lang="en-US">Organization and Business Operations (Details) [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_OrganizationandBusinessOperationsDetailsTable" xlink:to="nn_OrganizationandBusinessOperationsDetailsTable_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_OrganizationandBusinessOperationsDetailsLineItems_lbl" xml:lang="en-US">Organization and Business Operations (Details) [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_OrganizationandBusinessOperationsDetailsLineItems" xlink:to="nn_OrganizationandBusinessOperationsDetailsLineItems_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_SummaryofSignificantAccountingPoliciesDetailsTable" xlink:href="nn-20210930.xsd#nn_SummaryofSignificantAccountingPoliciesDetailsTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_SummaryofSignificantAccountingPoliciesDetailsTable_lbl" xml:lang="en-US">Summary of Significant Accounting Policies (Details) [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SummaryofSignificantAccountingPoliciesDetailsTable" xlink:to="nn_SummaryofSignificantAccountingPoliciesDetailsTable_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_SummaryofSignificantAccountingPoliciesDetailsLineItems_lbl" xml:lang="en-US">Summary of Significant Accounting Policies (Details) [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SummaryofSignificantAccountingPoliciesDetailsLineItems" xlink:to="nn_SummaryofSignificantAccountingPoliciesDetailsLineItems_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_CommonStockDetailsTable" xlink:href="nn-20210930.xsd#nn_CommonStockDetailsTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_CommonStockDetailsTable_lbl" xml:lang="en-US">Common Stock (Details) [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonStockDetailsTable" xlink:to="nn_CommonStockDetailsTable_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_CommonStockDetailsLineItems_lbl" xml:lang="en-US">Common Stock (Details) [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonStockDetailsLineItems" xlink:to="nn_CommonStockDetailsLineItems_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsequentEventTypeDomain_lbl" xml:lang="en-US">Subsequent Event Type [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventTypeDomain" xlink:to="us-gaap_SubsequentEventTypeDomain_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_SubsequentEventsDetailsTable_lbl" xml:lang="en-US">Subsequent Events (Details) [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SubsequentEventsDetailsTable" xlink:to="nn_SubsequentEventsDetailsTable_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_SubsequentEventsDetailsLineItems_lbl" xml:lang="en-US">Subsequent Events (Details) [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SubsequentEventsDetailsLineItems" xlink:to="nn_SubsequentEventsDetailsLineItems_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_PrivatePlacementWarrantsDetailsTable" xlink:href="nn-20210930.xsd#nn_PrivatePlacementWarrantsDetailsTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_PrivatePlacementWarrantsDetailsTable_lbl" xml:lang="en-US">Private Placement Warrants (Details) [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PrivatePlacementWarrantsDetailsTable" xlink:to="nn_PrivatePlacementWarrantsDetailsTable_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_PrivatePlacementWarrantsDetailsLineItems" xlink:href="nn-20210930.xsd#nn_PrivatePlacementWarrantsDetailsLineItems"/>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PrivatePlacementWarrantsDetailsLineItems" xlink:to="nn_PrivatePlacementWarrantsDetailsLineItems_lbl"/>
    <loc xlink:type="locator" xlink:label="srt_ScenarioUnspecifiedDomain" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ScenarioUnspecifiedDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="srt_ScenarioUnspecifiedDomain_lbl" xml:lang="en-US">Scenario [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="srt_ScenarioUnspecifiedDomain_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_RelatedPartyTransactionsDetailsTable" xlink:href="nn-20210930.xsd#nn_RelatedPartyTransactionsDetailsTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_RelatedPartyTransactionsDetailsTable_lbl" xml:lang="en-US">Related Party Transactions (Details) [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_RelatedPartyTransactionsDetailsTable" xlink:to="nn_RelatedPartyTransactionsDetailsTable_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_RelatedPartyTransactionsDetailsLineItems_lbl" xml:lang="en-US">Related Party Transactions (Details) [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_RelatedPartyTransactionsDetailsLineItems" xlink:to="nn_RelatedPartyTransactionsDetailsLineItems_lbl"/>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_InvestmentHeldinTrustAccountDetailsTable" xlink:to="nn_InvestmentHeldinTrustAccountDetailsTable_lbl"/>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_InvestmentHeldinTrustAccountDetailsLineItems" xlink:to="nn_InvestmentHeldinTrustAccountDetailsLineItems_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_CommitmentsandContingenciesDetailsTable_lbl" xml:lang="en-US">Commitments and Contingencies (Details) [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommitmentsandContingenciesDetailsTable" xlink:to="nn_CommitmentsandContingenciesDetailsTable_lbl"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_CommitmentsandContingenciesDetailsLineItems_lbl" xml:lang="en-US">Commitments and Contingencies (Details) [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommitmentsandContingenciesDetailsLineItems" xlink:to="nn_CommitmentsandContingenciesDetailsLineItems_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_StockholdersEquityDetailsTable" xlink:href="nn-20210930.xsd#nn_StockholdersEquityDetailsTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_StockholdersEquityDetailsTable_lbl" xml:lang="en-US">Stockholders&#8217; Equity (Details) [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StockholdersEquityDetailsTable" xlink:to="nn_StockholdersEquityDetailsTable_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_StockholdersEquityDetailsLineItems" xlink:href="nn-20210930.xsd#nn_StockholdersEquityDetailsLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_StockholdersEquityDetailsLineItems_lbl" xml:lang="en-US">Stockholders&#8217; Equity (Details) [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StockholdersEquityDetailsLineItems" xlink:to="nn_StockholdersEquityDetailsLineItems_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_RestatementofPreviouslyIssuedFinancialStatementsDetailsTable" xlink:href="nn-20210930.xsd#nn_RestatementofPreviouslyIssuedFinancialStatementsDetailsTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_RestatementofPreviouslyIssuedFinancialStatementsDetailsTable_lbl" xml:lang="en-US">Restatement of Previously Issued Financial Statements (Details) [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_RestatementofPreviouslyIssuedFinancialStatementsDetailsTable" xlink:to="nn_RestatementofPreviouslyIssuedFinancialStatementsDetailsTable_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_RestatementofPreviouslyIssuedFinancialStatementsDetailsLineItems" xlink:href="nn-20210930.xsd#nn_RestatementofPreviouslyIssuedFinancialStatementsDetailsLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_RestatementofPreviouslyIssuedFinancialStatementsDetailsLineItems_lbl" xml:lang="en-US">Restatement of Previously Issued Financial Statements (Details) [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_RestatementofPreviouslyIssuedFinancialStatementsDetailsLineItems" xlink:to="nn_RestatementofPreviouslyIssuedFinancialStatementsDetailsLineItems_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_IncomeTaxDetailsTable" xlink:href="nn-20210930.xsd#nn_IncomeTaxDetailsTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_IncomeTaxDetailsTable_lbl" xml:lang="en-US">Income Tax (Details) [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_IncomeTaxDetailsTable" xlink:to="nn_IncomeTaxDetailsTable_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_IncomeTaxDetailsLineItems" xlink:href="nn-20210930.xsd#nn_IncomeTaxDetailsLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_IncomeTaxDetailsLineItems_lbl" xml:lang="en-US">Income Tax (Details) [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_IncomeTaxDetailsLineItems" xlink:to="nn_IncomeTaxDetailsLineItems_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_ShortTermDebtTypeDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShortTermDebtTypeDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShortTermDebtTypeDomain_lbl" xml:lang="en-US">Short-term Debt, Type [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShortTermDebtTypeDomain" xlink:to="us-gaap_ShortTermDebtTypeDomain_lbl"/>
    <loc xlink:type="locator" xlink:label="us-gaap_RelatedPartyTransactionDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RelatedPartyTransactionDomain_lbl" xml:lang="en-US">Related Party Transaction [Domain]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionDomain" xlink:to="us-gaap_RelatedPartyTransactionDomain_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_DebtDetailsTable" xlink:href="nn-20210930.xsd#nn_DebtDetailsTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_DebtDetailsTable_lbl" xml:lang="en-US">Debt (Details) [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_DebtDetailsTable" xlink:to="nn_DebtDetailsTable_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_DebtDetailsLineItems" xlink:href="nn-20210930.xsd#nn_DebtDetailsLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_DebtDetailsLineItems_lbl" xml:lang="en-US">Debt (Details) [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_DebtDetailsLineItems" xlink:to="nn_DebtDetailsLineItems_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_WarrantsandWarrantLiabilityDetailsTable" xlink:href="nn-20210930.xsd#nn_WarrantsandWarrantLiabilityDetailsTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_WarrantsandWarrantLiabilityDetailsTable_lbl" xml:lang="en-US">Warrants and Warrant Liability (Details) [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WarrantsandWarrantLiabilityDetailsTable" xlink:to="nn_WarrantsandWarrantLiabilityDetailsTable_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_WarrantsandWarrantLiabilityDetailsLineItems" xlink:href="nn-20210930.xsd#nn_WarrantsandWarrantLiabilityDetailsLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_WarrantsandWarrantLiabilityDetailsLineItems_lbl" xml:lang="en-US">Warrants and Warrant Liability (Details) [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WarrantsandWarrantLiabilityDetailsLineItems" xlink:to="nn_WarrantsandWarrantLiabilityDetailsLineItems_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_CommonUnitsandConvertiblePreferredUnitsDetailsTable" xlink:href="nn-20210930.xsd#nn_CommonUnitsandConvertiblePreferredUnitsDetailsTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_CommonUnitsandConvertiblePreferredUnitsDetailsTable_lbl" xml:lang="en-US">Common Units and Convertible Preferred Units (Details) [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonUnitsandConvertiblePreferredUnitsDetailsTable" xlink:to="nn_CommonUnitsandConvertiblePreferredUnitsDetailsTable_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_CommonUnitsandConvertiblePreferredUnitsDetailsLineItems" xlink:href="nn-20210930.xsd#nn_CommonUnitsandConvertiblePreferredUnitsDetailsLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_CommonUnitsandConvertiblePreferredUnitsDetailsLineItems_lbl" xml:lang="en-US">Common Units and Convertible Preferred Units (Details) [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonUnitsandConvertiblePreferredUnitsDetailsLineItems" xlink:to="nn_CommonUnitsandConvertiblePreferredUnitsDetailsLineItems_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ATTAgreementDetailsTable" xlink:href="nn-20210930.xsd#nn_ATTAgreementDetailsTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_ATTAgreementDetailsTable_lbl" xml:lang="en-US">AT&amp;T Agreement (Details) [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ATTAgreementDetailsTable" xlink:to="nn_ATTAgreementDetailsTable_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_ATTAgreementDetailsLineItems" xlink:href="nn-20210930.xsd#nn_ATTAgreementDetailsLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_ATTAgreementDetailsLineItems_lbl" xml:lang="en-US">AT&amp;T Agreement (Details) [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ATTAgreementDetailsLineItems" xlink:to="nn_ATTAgreementDetailsLineItems_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_EquityBasedCompensationDetailsTable" xlink:href="nn-20210930.xsd#nn_EquityBasedCompensationDetailsTable"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_EquityBasedCompensationDetailsTable_lbl" xml:lang="en-US">Equity-Based Compensation (Details) [Table]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_EquityBasedCompensationDetailsTable" xlink:to="nn_EquityBasedCompensationDetailsTable_lbl"/>
    <loc xlink:type="locator" xlink:label="nn_EquityBasedCompensationDetailsLineItems" xlink:href="nn-20210930.xsd#nn_EquityBasedCompensationDetailsLineItems"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_EquityBasedCompensationDetailsLineItems_lbl" xml:lang="en-US">Equity-Based Compensation (Details) [Line Items]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_EquityBasedCompensationDetailsLineItems" xlink:to="nn_EquityBasedCompensationDetailsLineItems_lbl"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_ATTAgreementTextBlock_lbl0" xml:lang="en-US">Disclosure of AT&amp;T Agreement.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ATTAgreementTextBlock" xlink:to="nn_ATTAgreementTextBlock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_AccruedCashInterestAndUnfundedFees_lbl0" xml:lang="en-US">Accrued cash interest and unfunded fees.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_AccruedCashInterestAndUnfundedFees" xlink:to="nn_AccruedCashInterestAndUnfundedFees_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_AccruedDeferredUnderwritingFee_lbl0" xml:lang="en-US">Accrued deferred underwriting fee.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_AccruedDeferredUnderwritingFee" xlink:to="nn_AccruedDeferredUnderwritingFee_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_AccruedExpensesCurrent_lbl0" xml:lang="en-US">Accrued expenses current.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_AccruedExpensesCurrent" xlink:to="nn_AccruedExpensesCurrent_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_AccruedInterest_lbl0" xml:lang="en-US">Amount of accrued interest.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_AccruedInterest" xlink:to="nn_AccruedInterest_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_AccruedSalaryAndOtherEmployeeLiabilities_lbl0" xml:lang="en-US">Accrued salary and other employee liabilities.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_AccruedSalaryAndOtherEmployeeLiabilities" xlink:to="nn_AccruedSalaryAndOtherEmployeeLiabilities_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_AggregateGrossProceeds_lbl1" xml:lang="en-US">Aggregate gross proceeds.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_AggregateGrossProceeds" xlink:to="nn_AggregateGrossProceeds_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_AggregateOfSharePercentage_lbl0" xml:lang="en-US">Aggregate of shares percentage.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_AggregateOfSharePercentage" xlink:to="nn_AggregateOfSharePercentage_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_AmortizationOfDebtIssuanceCostsAndDiscount_lbl0" xml:lang="en-US">Amortization of debt issuance costs and discount.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_AmortizationOfDebtIssuanceCostsAndDiscount" xlink:to="nn_AmortizationOfDebtIssuanceCostsAndDiscount_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_AssetRetirementObligationAccretion_lbl0" xml:lang="en-US">Asset retirement obligation accretion.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_AssetRetirementObligationAccretion" xlink:to="nn_AssetRetirementObligationAccretion_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_BasedOnComparableCompaniesPubliclyTradedCommonStockPricesAndTheCapitalStructure_lbl0" xml:lang="en-US">Based on comparable companies publicly traded common stock prices and the capital structure.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_BasedOnComparableCompaniesPubliclyTradedCommonStockPricesAndTheCapitalStructure" xlink:to="nn_BasedOnComparableCompaniesPubliclyTradedCommonStockPricesAndTheCapitalStructure_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_BasicAndDilutedLossPerUnit_lbl0" xml:lang="en-US">Number of basic and diluted loss per unit.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_BasicAndDilutedLossPerUnit" xlink:to="nn_BasicAndDilutedLossPerUnit_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_BasicAndDilutedNetIncomePerShare_lbl0" xml:lang="en-US">The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_BasicAndDilutedNetIncomePerShare" xlink:to="nn_BasicAndDilutedNetIncomePerShare_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_BasicAndDilutedNetLossPerNonredeemableCommonShare_lbl0" xml:lang="en-US">The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_BasicAndDilutedNetLossPerNonredeemableCommonShare" xlink:to="nn_BasicAndDilutedNetLossPerNonredeemableCommonShare_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_BasicAndDilutedNetLossPerShareCommonStockinDollarsPerShare_lbl0" xml:lang="en-US">Basic and diluted net loss per share, common stock (in Dollars per share).</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_BasicAndDilutedNetLossPerShareCommonStockinDollarsPerShare" xlink:to="nn_BasicAndDilutedNetLossPerShareCommonStockinDollarsPerShare_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_BasicAndDilutedWeightedAverageSharesOutstandingCommonStockSubjectToPossibleRedemption_lbl0" xml:lang="en-US">Basic and diluted weighted average shares outstanding, Common stock subject to possible redemption.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_BasicAndDilutedWeightedAverageSharesOutstandingCommonStockSubjectToPossibleRedemption" xlink:to="nn_BasicAndDilutedWeightedAverageSharesOutstandingCommonStockSubjectToPossibleRedemption_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_BasicAndDilutedWeightedAverageSharesOutstandingCommonStockinShares_lbl1" xml:lang="en-US">Basic and diluted weighted average shares outstanding, common stock (in Shares).</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_BasicAndDilutedWeightedAverageSharesOutstandingCommonStockinShares" xlink:to="nn_BasicAndDilutedWeightedAverageSharesOutstandingCommonStockinShares_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_CashConsideration_lbl0" xml:lang="en-US">The amount of cash consideration.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CashConsideration" xlink:to="nn_CashConsideration_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_ChangeInValueOfClassACommonStockSubjectToPossibleRedemption_lbl1" xml:lang="en-US">Change in value of Class A common stock subject to possible redemption.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ChangeInValueOfClassACommonStockSubjectToPossibleRedemption" xlink:to="nn_ChangeInValueOfClassACommonStockSubjectToPossibleRedemption_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_ClassOfWarrantsOrRightOutstanding_lbl0" xml:lang="en-US">Number of warrants.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ClassOfWarrantsOrRightOutstanding" xlink:to="nn_ClassOfWarrantsOrRightOutstanding_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_CommitmentFeeAsset_lbl0" xml:lang="en-US">Commitment fee asset.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommitmentFeeAsset" xlink:to="nn_CommitmentFeeAsset_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_CommonStockExercisePrice_lbl0" xml:lang="en-US">Common stock price, per share.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonStockExercisePrice" xlink:to="nn_CommonStockExercisePrice_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_CommonStockSharesConsideration_lbl0" xml:lang="en-US">Common stock shares consideration.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonStockSharesConsideration" xlink:to="nn_CommonStockSharesConsideration_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_CommonStockSubjectToPossibleRedemption_lbl1" xml:lang="en-US">common stock subject to possible redemption.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonStockSubjectToPossibleRedemption" xlink:to="nn_CommonStockSubjectToPossibleRedemption_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_CommonStockTextBlock_lbl0" xml:lang="en-US">The entire disclosure for terms, amounts, nature of changes, rights and privileges, dividends, and other matters related to common stock.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonStockTextBlock" xlink:to="nn_CommonStockTextBlock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_CommonStockValue1_lbl0" xml:lang="en-US">Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders&apos; equity.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonStockValue1" xlink:to="nn_CommonStockValue1_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_CommonStockValue2_lbl0" xml:lang="en-US">Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders&apos; equity.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonStockValue2" xlink:to="nn_CommonStockValue2_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_CommonStockValue3_lbl0" xml:lang="en-US">Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders&apos; equity.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonStockValue3" xlink:to="nn_CommonStockValue3_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_CommonStockValue4_lbl0" xml:lang="en-US">Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders&apos; equity.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonStockValue4" xlink:to="nn_CommonStockValue4_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_CommonStockValue5_lbl0" xml:lang="en-US">Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders&apos; equity.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonStockValue5" xlink:to="nn_CommonStockValue5_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_CommonStockValue6_lbl0" xml:lang="en-US">Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders&apos; equity.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonStockValue6" xlink:to="nn_CommonStockValue6_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_CommonStockValue7_lbl0" xml:lang="en-US">Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders&apos; equity.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonStockValue7" xlink:to="nn_CommonStockValue7_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_CommonUnitsAndConvertiblePreferredUnitsAuthorized_lbl0" xml:lang="en-US">Common units and convertible preferred units authorized.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonUnitsAndConvertiblePreferredUnitsAuthorized" xlink:to="nn_CommonUnitsAndConvertiblePreferredUnitsAuthorized_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_CommonUnitsAndConvertiblePreferredUnitsTextBlock_lbl0" xml:lang="en-US">Common units and convertible preferred units.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_CommonUnitsAndConvertiblePreferredUnitsTextBlock" xlink:to="nn_CommonUnitsAndConvertiblePreferredUnitsTextBlock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_ConsummationOfTheTransactions_lbl0" xml:lang="en-US">Consummation of the Transactions.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ConsummationOfTheTransactions" xlink:to="nn_ConsummationOfTheTransactions_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_ConversionBasisPercentage_lbl0" xml:lang="en-US">Conversion basis, percentage.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ConversionBasisPercentage" xlink:to="nn_ConversionBasisPercentage_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_ConvertDiscount_lbl0" xml:lang="en-US">Amount of convert discount.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ConvertDiscount" xlink:to="nn_ConvertDiscount_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_DebtDiscount_lbl0" xml:lang="en-US">Amount of debt discount.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_DebtDiscount" xlink:to="nn_DebtDiscount_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_DebtIssuanceCost_lbl0" xml:lang="en-US">Amount of  debt issuance cost.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_DebtIssuanceCost" xlink:to="nn_DebtIssuanceCost_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_DeferredTaxAssetsOtherTaxCarryforward_lbl0" xml:lang="en-US">Amount of deferred tax assets other tax carryforwards.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_DeferredTaxAssetsOtherTaxCarryforward" xlink:to="nn_DeferredTaxAssetsOtherTaxCarryforward_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_DeferredUnderwritingDiscount_lbl0" xml:lang="en-US">Deferred underwriting discount.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_DeferredUnderwritingDiscount" xlink:to="nn_DeferredUnderwritingDiscount_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_DeferredUnderwritingFeesPayableNonCurrent_lbl0" xml:lang="en-US">Deferred underwriting fees.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_DeferredUnderwritingFeesPayableNonCurrent" xlink:to="nn_DeferredUnderwritingFeesPayableNonCurrent_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_DerivativeIssuanceAmount_lbl0" xml:lang="en-US">Amount of derivative issuance amount.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_DerivativeIssuanceAmount" xlink:to="nn_DerivativeIssuanceAmount_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_DescriptionOfConvertibleLoanCommitments_lbl0" xml:lang="en-US">Amount of description of convertible loan commitments.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_DescriptionOfConvertibleLoanCommitments" xlink:to="nn_DescriptionOfConvertibleLoanCommitments_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_DescriptionOfWarrants_lbl0" xml:lang="en-US">Description of warrants.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_DescriptionOfWarrants" xlink:to="nn_DescriptionOfWarrants_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_DiscountForLacksOfMarketability_lbl0" xml:lang="en-US">Discount for Lack of Marketability.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_DiscountForLacksOfMarketability" xlink:to="nn_DiscountForLacksOfMarketability_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_EffectiveIncomeTaxRateReconciliationFormationAndOperatingCostsPercent_lbl0" xml:lang="en-US">Percentage of the formation and operating costs.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_EffectiveIncomeTaxRateReconciliationFormationAndOperatingCostsPercent" xlink:to="nn_EffectiveIncomeTaxRateReconciliationFormationAndOperatingCostsPercent_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_EquityBasedCompensationExpense_lbl0" xml:lang="en-US">Equity based compensation expense.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_EquityBasedCompensationExpense" xlink:to="nn_EquityBasedCompensationExpense_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_ExpectedDividends_lbl0" xml:lang="en-US">Expected dividends.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ExpectedDividends" xlink:to="nn_ExpectedDividends_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_ExpectedTermyears_lbl0" xml:lang="en-US">Expected term (years).</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ExpectedTermyears" xlink:to="nn_ExpectedTermyears_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_ExpectedVolatilities_lbl0" xml:lang="en-US">Expected volatility</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ExpectedVolatilities" xlink:to="nn_ExpectedVolatilities_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_FairValueAdjustmentForFinancingWarrants_lbl0" xml:lang="en-US">Amount of Fair value adjustment for Financing Warrants.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FairValueAdjustmentForFinancingWarrants" xlink:to="nn_FairValueAdjustmentForFinancingWarrants_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_FairValueAdjustmentForVendorWarrants_lbl0" xml:lang="en-US">Amount of Fair value adjustment for Vendor Warrants.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FairValueAdjustmentForVendorWarrants" xlink:to="nn_FairValueAdjustmentForVendorWarrants_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_FairValueDiscountForLackOfMarketability_lbl1" xml:lang="en-US">Fair value discount for lack of marketability percentage.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FairValueDiscountForLackOfMarketability" xlink:to="nn_FairValueDiscountForLackOfMarketability_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_FairValueIssuanceOfWarrantInConnectionWithFortressFinancingAgreement_lbl0" xml:lang="en-US">Amount of fair value issuance of warrants in connection with Fortress Financing Agreement.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FairValueIssuanceOfWarrantInConnectionWithFortressFinancingAgreement" xlink:to="nn_FairValueIssuanceOfWarrantInConnectionWithFortressFinancingAgreement_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_FairValueOfInitialMeasurement_lbl0" xml:lang="en-US">Initial measurement.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FairValueOfInitialMeasurement" xlink:to="nn_FairValueOfInitialMeasurement_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_FairValueOfVestingOfVendorWarrants_lbl0" xml:lang="en-US">Amount of vesting of vendor warrants.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FairValueOfVestingOfVendorWarrants" xlink:to="nn_FairValueOfVestingOfVendorWarrants_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_FairValueOfWarrantsIssued_lbl0" xml:lang="en-US">Amount of fair value of warrants issued.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FairValueOfWarrantsIssued" xlink:to="nn_FairValueOfWarrantsIssued_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_FairValueOfWarrantsinPerShare_lbl1" xml:lang="en-US">Fair value of warrants per share.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FairValueOfWarrantsinPerShare" xlink:to="nn_FairValueOfWarrantsinPerShare_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_FairValueWarrants_lbl0" xml:lang="en-US">Amount of fair value warrants.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FairValueWarrants" xlink:to="nn_FairValueWarrants_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_FederalDepositoryInsuranceCoverage_lbl0" xml:lang="en-US">Amount of expense for Federal Deposit Insurance Corporation (FDIC) insurance.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FederalDepositoryInsuranceCoverage" xlink:to="nn_FederalDepositoryInsuranceCoverage_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_FinancingCostsAccruedButNotPaid_lbl0" xml:lang="en-US">Financing costs accrued but not paid.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FinancingCostsAccruedButNotPaid" xlink:to="nn_FinancingCostsAccruedButNotPaid_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_FixedAssetWriteoff_lbl0" xml:lang="en-US">Amount of fixed asset write-off.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FixedAssetWriteoff" xlink:to="nn_FixedAssetWriteoff_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_ForfeitedShares_lbl0" xml:lang="en-US">Forfeited shares.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ForfeitedShares" xlink:to="nn_ForfeitedShares_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_FormationAndOperatingCosts_lbl0" xml:lang="en-US">Formation and operating costs.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FormationAndOperatingCosts" xlink:to="nn_FormationAndOperatingCosts_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_FounderSharesForfeited_lbl0" xml:lang="en-US">Number of founder shares forfeited.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_FounderSharesForfeited" xlink:to="nn_FounderSharesForfeited_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_GrantDateFairValue_lbl0" xml:lang="en-US">Grant date fair value.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_GrantDateFairValue" xlink:to="nn_GrantDateFairValue_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_IdenticalWarrants_lbl0" xml:lang="en-US">Identical warrants.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_IdenticalWarrants" xlink:to="nn_IdenticalWarrants_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_IncreaseDecreaseInOtherCurrentAsset_lbl0" xml:lang="en-US">Other current assets.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_IncreaseDecreaseInOtherCurrentAsset" xlink:to="nn_IncreaseDecreaseInOtherCurrentAsset_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_IncreaseInAccountsPayableAndAccruedExpenseForDeferredOfferingCosts_lbl0" xml:lang="en-US">Increase in accounts payable and accrued expenses for deferred offering costs.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_IncreaseInAccountsPayableAndAccruedExpenseForDeferredOfferingCosts" xlink:to="nn_IncreaseInAccountsPayableAndAccruedExpenseForDeferredOfferingCosts_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_InitialClassificationOfWarrantLiabilities_lbl0" xml:lang="en-US">Initial classification of warrant liability.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_InitialClassificationOfWarrantLiabilities" xlink:to="nn_InitialClassificationOfWarrantLiabilities_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_InitialClassificationOfWarrantLiability_lbl0" xml:lang="en-US">Amount of expense (income) related to adjustment to fair value of warrant liability.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_InitialClassificationOfWarrantLiability" xlink:to="nn_InitialClassificationOfWarrantLiability_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_InitialValueOfClassACommonStockSubjectToPossibleRedemption_lbl0" xml:lang="en-US">Initial value of Class A common stock subject to possible redemption.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_InitialValueOfClassACommonStockSubjectToPossibleRedemption" xlink:to="nn_InitialValueOfClassACommonStockSubjectToPossibleRedemption_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_IntrinsicValueOfUnitOptionsExercised_lbl0" xml:lang="en-US">Intrinsic value of Unit Options exercised.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_IntrinsicValueOfUnitOptionsExercised" xlink:to="nn_IntrinsicValueOfUnitOptionsExercised_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_IssuanceOfWarrants_lbl0" xml:lang="en-US">Issuance of warrants.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_IssuanceOfWarrants" xlink:to="nn_IssuanceOfWarrants_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_IssuanceOfWarrantsForRentExpense_lbl0" xml:lang="en-US">Issuance of warrants for rent expense.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_IssuanceOfWarrantsForRentExpense" xlink:to="nn_IssuanceOfWarrantsForRentExpense_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_MarginRate_lbl0" xml:lang="en-US">Amount of margin rate.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_MarginRate" xlink:to="nn_MarginRate_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_MinimumPercentageOfTrustAccountRequiredForBusinessCombinationPercentage_lbl0" xml:lang="en-US">Minimum percentage of trust account required for business combination.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_MinimumPercentageOfTrustAccountRequiredForBusinessCombinationPercentage" xlink:to="nn_MinimumPercentageOfTrustAccountRequiredForBusinessCombinationPercentage_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_NetIncomeLosses_lbl0" xml:lang="en-US">The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_NetIncomeLosses" xlink:to="nn_NetIncomeLosses_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_NetLossAttributableToCommonUnitholders_lbl0" xml:lang="en-US">Net Loss attributable to common unitholders.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_NetLossAttributableToCommonUnitholders" xlink:to="nn_NetLossAttributableToCommonUnitholders_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_NetLosses_lbl0" xml:lang="en-US">Amount of net loss.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_NetLosses" xlink:to="nn_NetLosses_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_NetTangibleAssets_lbl0" xml:lang="en-US">The amount of Net tangible assets.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_NetTangibleAssets" xlink:to="nn_NetTangibleAssets_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_NoticeOfRedemptionDescription_lbl0" xml:lang="en-US">Notice of redemption description.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_NoticeOfRedemptionDescription" xlink:to="nn_NoticeOfRedemptionDescription_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_NumberOfCustomer_lbl0" xml:lang="en-US">A description of number of customer.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_NumberOfCustomer" xlink:to="nn_NumberOfCustomer_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_OfferingCosts_lbl1" xml:lang="en-US">Offering costs.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_OfferingCosts" xlink:to="nn_OfferingCosts_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_OfferingCostsPolicyTextBlock_lbl0" xml:lang="en-US">Offering costs policy text block</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_OfferingCostsPolicyTextBlock" xlink:to="nn_OfferingCostsPolicyTextBlock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_OperatingBankAccount_lbl0" xml:lang="en-US">The amount of operating bank account.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_OperatingBankAccount" xlink:to="nn_OperatingBankAccount_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_OutstandingSharesPercentage_lbl0" xml:lang="en-US">Percentage of outstanding shares.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_OutstandingSharesPercentage" xlink:to="nn_OutstandingSharesPercentage_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_PIPEInvestors_lbl0" xml:lang="en-US">PIPE Investors.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PIPEInvestors" xlink:to="nn_PIPEInvestors_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_PaymentOfOfferingCosts_lbl0" xml:lang="en-US">Payment of offering costs.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PaymentOfOfferingCosts" xlink:to="nn_PaymentOfOfferingCosts_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_PossibleDissolutionExpenses_lbl0" xml:lang="en-US">Possible dissolution expenses.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PossibleDissolutionExpenses" xlink:to="nn_PossibleDissolutionExpenses_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_PossibleRedemption_lbl0" xml:lang="en-US">Possible redemption.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PossibleRedemption" xlink:to="nn_PossibleRedemption_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_PreferredStockValue1_lbl0" xml:lang="en-US">Aggregate par or stated value of issued nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders&apos; equity.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PreferredStockValue1" xlink:to="nn_PreferredStockValue1_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_PreferredStockValue2_lbl0" xml:lang="en-US">Aggregate par or stated value of issued nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders&apos; equity.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PreferredStockValue2" xlink:to="nn_PreferredStockValue2_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_PreferredUnit_lbl0" xml:lang="en-US">Number of shares preferred units.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PreferredUnit" xlink:to="nn_PreferredUnit_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_PreferredUnits_lbl0" xml:lang="en-US">The cumulative amount of offering costs allocated to the preferred partners.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PreferredUnits" xlink:to="nn_PreferredUnits_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_PricePerUnits_lbl0" xml:lang="en-US">Price per units.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PricePerUnits" xlink:to="nn_PricePerUnits_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_PrincipalDepositedInTrustAccount_lbl0" xml:lang="en-US">Principal deposited in Trust Account.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PrincipalDepositedInTrustAccount" xlink:to="nn_PrincipalDepositedInTrustAccount_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_PriorWrittenNoticeOfRedemption_lbl0" xml:lang="en-US">Prior written notice of redemption.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PriorWrittenNoticeOfRedemption" xlink:to="nn_PriorWrittenNoticeOfRedemption_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_ProceedsFromExerciseOfClassAUnitOptions_lbl0" xml:lang="en-US">Proceeds from exercise of Class A unit options.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ProceedsFromExerciseOfClassAUnitOptions" xlink:to="nn_ProceedsFromExerciseOfClassAUnitOptions_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_ProceedsFromSeniorSecuredLoan_lbl0" xml:lang="en-US">Proceeds from senior secured loan.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ProceedsFromSeniorSecuredLoan" xlink:to="nn_ProceedsFromSeniorSecuredLoan_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_ProceedsOfThePIPEInvestment_lbl0" xml:lang="en-US">Proceeds of the PIPE Investment.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ProceedsOfThePIPEInvestment" xlink:to="nn_ProceedsOfThePIPEInvestment_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_PublicWarrantsRedemptionDescription_lbl0" xml:lang="en-US">The entire description of Public warrants redemption.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PublicWarrantsRedemptionDescription" xlink:to="nn_PublicWarrantsRedemptionDescription_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_PurchaseAdditionalUnits_lbl0" xml:lang="en-US">Purchase additional unite.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PurchaseAdditionalUnits" xlink:to="nn_PurchaseAdditionalUnits_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_PurchaseAggregateShares_lbl0" xml:lang="en-US">Aggregate purchase share.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PurchaseAggregateShares" xlink:to="nn_PurchaseAggregateShares_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_PurchaseOfWarrants_lbl0" xml:lang="en-US">Purchase of warrants.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PurchaseOfWarrants" xlink:to="nn_PurchaseOfWarrants_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_PurchasePricePerShare_lbl0" xml:lang="en-US">Purchase price per share.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_PurchasePricePerShare" xlink:to="nn_PurchasePricePerShare_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_QuotePrice_lbl0" xml:lang="en-US">Quote price.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_QuotePrice" xlink:to="nn_QuotePrice_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_ReferenceRate_lbl0" xml:lang="en-US">Amount of reference rate.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ReferenceRate" xlink:to="nn_ReferenceRate_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_RegistrationRightsAgreement_lbl0" xml:lang="en-US">Registration Rights Agreement.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_RegistrationRightsAgreement" xlink:to="nn_RegistrationRightsAgreement_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_RegistrationRightsAgreementDescription_lbl0" xml:lang="en-US">Registration rights agreement description.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_RegistrationRightsAgreementDescription" xlink:to="nn_RegistrationRightsAgreementDescription_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_RepaymentOfPromissoryNoteToSponsors_lbl0" xml:lang="en-US">Repayment of Promissory Note to Sponsor.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_RepaymentOfPromissoryNoteToSponsors" xlink:to="nn_RepaymentOfPromissoryNoteToSponsors_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_RevenuesExpected_lbl0" xml:lang="en-US">Amount of revenues expected.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_RevenuesExpected" xlink:to="nn_RevenuesExpected_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_RiskfreeRate_lbl0" xml:lang="en-US">Risk-free rate.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_RiskfreeRate" xlink:to="nn_RiskfreeRate_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_SaleOfPrivatePlacementWarrants_lbl0" xml:lang="en-US">Sale of Private Placement Warrants.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SaleOfPrivatePlacementWarrants" xlink:to="nn_SaleOfPrivatePlacementWarrants_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_SaleOfUnitsThroughPublicOffering_lbl0" xml:lang="en-US">Sale of Units through public offering.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SaleOfUnitsThroughPublicOffering" xlink:to="nn_SaleOfUnitsThroughPublicOffering_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_SaleleasebackFinancingMethod_lbl0" xml:lang="en-US">The amount of sale-leaseback financing method.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SaleleasebackFinancingMethod" xlink:to="nn_SaleleasebackFinancingMethod_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_SeniorSecuredLoanIssuanceCosts_lbl0" xml:lang="en-US">Senior secured loan issuance costs.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SeniorSecuredLoanIssuanceCosts" xlink:to="nn_SeniorSecuredLoanIssuanceCosts_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_SeniorSecuredLoanPaidinkindInterest_lbl0" xml:lang="en-US">Senior secured loan, paid in kind interest.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SeniorSecuredLoanPaidinkindInterest" xlink:to="nn_SeniorSecuredLoanPaidinkindInterest_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_SettlementOfNotesPayableForClassDPreferredShares_lbl0" xml:lang="en-US">Settlement of notes payable for Class D preferred shares.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SettlementOfNotesPayableForClassDPreferredShares" xlink:to="nn_SettlementOfNotesPayableForClassDPreferredShares_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionNonvestedNumber_lbl1" xml:lang="en-US">Units nonvested, Ending Balance.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionNonvestedNumber" xlink:to="nn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionNonvestedNumber_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCancelledInPeriodGross_lbl0" xml:lang="en-US">Weighted average per share amount at which cancelled can acquire shares of common stock by exercise of options.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCancelledInPeriodGross" xlink:to="nn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCancelledInPeriodGross_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodGros_lbl0" xml:lang="en-US">Options to Acquire Units, Exercised.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodGros" xlink:to="nn_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodGros_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionCancelledInPeriodWeightedAverageExercisePrice_lbl0" xml:lang="en-US">Weighted Average Exercise Price per Unit, Cancelled.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionCancelledInPeriodWeightedAverageExercisePrice" xlink:to="nn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionCancelledInPeriodWeightedAverageExercisePrice_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionGrantsInPeriodWeightedAverageExercisePrice_lbl0" xml:lang="en-US">Weighted Average Exercise Price per Unit, Granted.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionGrantsInPeriodWeightedAverageExercisePrice" xlink:to="nn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionGrantsInPeriodWeightedAverageExercisePrice_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsCancelledInPeriodWeightedAverageExercisePrice_lbl0" xml:lang="en-US">Weighted Average Exercise Price per Unit, Cancelled.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsCancelledInPeriodWeightedAverageExercisePrice" xlink:to="nn_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsCancelledInPeriodWeightedAverageExercisePrice_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueCancelled_lbl0" xml:lang="en-US">Aggregate Intrinsic Value, Cancelled.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueCancelled" xlink:to="nn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueCancelled_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueExercised_lbl0" xml:lang="en-US">Aggregate Intrinsic Value, Exercised.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueExercised" xlink:to="nn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueExercised_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueGranted_lbl0" xml:lang="en-US">Aggregate Intrinsic Value, Granted.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueGranted" xlink:to="nn_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueGranted_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_SponorPayments_lbl0" xml:lang="en-US">Sponor payments.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SponorPayments" xlink:to="nn_SponorPayments_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_SponsorPricePerShare_lbl0" xml:lang="en-US">Sponsor price, per share.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_SponsorPricePerShare" xlink:to="nn_SponsorPricePerShare_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_StockIssuedDurimgPeriodValueOFInitialClassificationOfWarrantLiability_lbl0" xml:lang="en-US">Initial classification of warrant liability.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StockIssuedDurimgPeriodValueOFInitialClassificationOfWarrantLiability" xlink:to="nn_StockIssuedDurimgPeriodValueOFInitialClassificationOfWarrantLiability_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_StockIssuedDuringPeriodCancellationOfCommonStockShares_lbl0" xml:lang="en-US">Common stock subject to possible redemption.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StockIssuedDuringPeriodCancellationOfCommonStockShares" xlink:to="nn_StockIssuedDuringPeriodCancellationOfCommonStockShares_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_StockIssuedDuringPeriodCommonStockSubjectToPossibleRedemption_lbl0" xml:lang="en-US">Stock issued during period of common stock subject to possible redemption.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StockIssuedDuringPeriodCommonStockSubjectToPossibleRedemption" xlink:to="nn_StockIssuedDuringPeriodCommonStockSubjectToPossibleRedemption_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_StockIssuedDuringPeriodCommonStockSubjectToPossibleRedemptionShares_lbl0" xml:lang="en-US">Stock issued during period common stock subject to possible redemption shares.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StockIssuedDuringPeriodCommonStockSubjectToPossibleRedemptionShares" xlink:to="nn_StockIssuedDuringPeriodCommonStockSubjectToPossibleRedemptionShares_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_StockIssuedDuringPeriodDeferredUnderwritersDiscount_lbl0" xml:lang="en-US">Deferred underwriters&#8217; discount.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StockIssuedDuringPeriodDeferredUnderwritersDiscount" xlink:to="nn_StockIssuedDuringPeriodDeferredUnderwritersDiscount_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_StockIssuedDuringPeriodSharesOfCancellationOfCommonUnits_lbl0" xml:lang="en-US">Cancellation of Common Units, shares.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StockIssuedDuringPeriodSharesOfCancellationOfCommonUnits" xlink:to="nn_StockIssuedDuringPeriodSharesOfCancellationOfCommonUnits_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_StockIssuedDuringPeriodUnderwritersDiscount_lbl0" xml:lang="en-US">Underwriters&#8217; discount.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StockIssuedDuringPeriodUnderwritersDiscount" xlink:to="nn_StockIssuedDuringPeriodUnderwritersDiscount_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_StockIssuedDuringPeriodValueOfCancellationOfClassBCommonStock_lbl0" xml:lang="en-US">Cancellation of Class B common stock.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StockIssuedDuringPeriodValueOfCancellationOfClassBCommonStock" xlink:to="nn_StockIssuedDuringPeriodValueOfCancellationOfClassBCommonStock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_StockIssuedDuringPeriodValueOfChangeInRedemptionValue_lbl0" xml:lang="en-US">Change in Redemption Value.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StockIssuedDuringPeriodValueOfChangeInRedemptionValue" xlink:to="nn_StockIssuedDuringPeriodValueOfChangeInRedemptionValue_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_StockIssuedDuringPeriodValueOfTransactionCostsAllocatedToWarrantLiability_lbl0" xml:lang="en-US">Transaction costs allocated to warrant liability.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StockIssuedDuringPeriodValueOfTransactionCostsAllocatedToWarrantLiability" xlink:to="nn_StockIssuedDuringPeriodValueOfTransactionCostsAllocatedToWarrantLiability_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_StockIssuedDuringPeriodValueOfVestingOfCommonWarrants_lbl0" xml:lang="en-US">Vesting of common warrants.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StockIssuedDuringPeriodValueOfVestingOfCommonWarrants" xlink:to="nn_StockIssuedDuringPeriodValueOfVestingOfCommonWarrants_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_StockPurchase_lbl0" xml:lang="en-US">Number of shares stock purchase.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StockPurchase" xlink:to="nn_StockPurchase_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_StockholderEquity_lbl0" xml:lang="en-US">Stockholders&#8217; equity.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StockholderEquity" xlink:to="nn_StockholderEquity_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_StockissuedduringperiodvalueequitybasedCompensationExpense_lbl0" xml:lang="en-US">Equity-based compensation expense.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_StockissuedduringperiodvalueequitybasedCompensationExpense" xlink:to="nn_StockissuedduringperiodvalueequitybasedCompensationExpense_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_TotalCompensationCostRelatedToNonvestedProfitsInterestUnits_lbl0" xml:lang="en-US">Total compensation cost related to nonvested Profits Interest Units.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_TotalCompensationCostRelatedToNonvestedProfitsInterestUnits" xlink:to="nn_TotalCompensationCostRelatedToNonvestedProfitsInterestUnits_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_TotalFairValueOfOptionsVested_lbl0" xml:lang="en-US">Total fair value of options vested.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_TotalFairValueOfOptionsVested" xlink:to="nn_TotalFairValueOfOptionsVested_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_TotalFairValueOfUnitsVested_lbl0" xml:lang="en-US">Total fair value of units vested.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_TotalFairValueOfUnitsVested" xlink:to="nn_TotalFairValueOfUnitsVested_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_TotalFairValueOfUnitsVestedUponGrantAndVested_lbl0" xml:lang="en-US">Total fair value of units vested upon grant and vested.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_TotalFairValueOfUnitsVestedUponGrantAndVested" xlink:to="nn_TotalFairValueOfUnitsVestedUponGrantAndVested_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_TotalPreferredInterest_lbl0" xml:lang="en-US">Total preferred interests.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_TotalPreferredInterest" xlink:to="nn_TotalPreferredInterest_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_TransactionCostsAllocatedToWarrantLiabilities_lbl0" xml:lang="en-US">Transaction costs allocated to warrant liability.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_TransactionCostsAllocatedToWarrantLiabilities" xlink:to="nn_TransactionCostsAllocatedToWarrantLiabilities_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_TransactionCostsAllocatedToWarrantLiability_lbl0" xml:lang="en-US">Amount of expense (income) related to adjustment to fair value of warrant liability.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_TransactionCostsAllocatedToWarrantLiability" xlink:to="nn_TransactionCostsAllocatedToWarrantLiability_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_TransferOfCashFromTrustForPaymentOfDelawareStateFranchiseTax_lbl0" xml:lang="en-US">Transfer of cash from trust for payment of Delaware state franchise tax.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_TransferOfCashFromTrustForPaymentOfDelawareStateFranchiseTax" xlink:to="nn_TransferOfCashFromTrustForPaymentOfDelawareStateFranchiseTax_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_USMoneyMarketHeldInTrustAccount_lbl0" xml:lang="en-US">Amount of money market held in trust Account.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_USMoneyMarketHeldInTrustAccount" xlink:to="nn_USMoneyMarketHeldInTrustAccount_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_USTreasurySecuritiesHeldInTrustAccount_lbl0" xml:lang="en-US">Amount of treasury securities held in trust account.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_USTreasurySecuritiesHeldInTrustAccount" xlink:to="nn_USTreasurySecuritiesHeldInTrustAccount_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_UnderwriterAmountPayable_lbl0" xml:lang="en-US">Underwriter amount payable.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_UnderwriterAmountPayable" xlink:to="nn_UnderwriterAmountPayable_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_UnitOptionExercisable_lbl0" xml:lang="en-US">Unit options exercisable.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_UnitOptionExercisable" xlink:to="nn_UnitOptionExercisable_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_UnitOptionExercisableAndExpectedToVest_lbl0" xml:lang="en-US">Unit options exercisable and expected to vest.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_UnitOptionExercisableAndExpectedToVest" xlink:to="nn_UnitOptionExercisableAndExpectedToVest_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_UnitsNonvestedUnitsVested_lbl0" xml:lang="en-US">Units nonvested, Units vested</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_UnitsNonvestedUnitsVested" xlink:to="nn_UnitsNonvestedUnitsVested_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_UnsecuredConvertibleBridgeAmount_lbl0" xml:lang="en-US">Amount of unsecured convertible bridge amount.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_UnsecuredConvertibleBridgeAmount" xlink:to="nn_UnsecuredConvertibleBridgeAmount_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_WarrantLiabilityPrivatePlacementWarrants_lbl0" xml:lang="en-US">Warrant Liability Private Placement Warrants.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WarrantLiabilityPrivatePlacementWarrants" xlink:to="nn_WarrantLiabilityPrivatePlacementWarrants_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_WarrantLiabilityPublicWarrants_lbl0" xml:lang="en-US">Warrant Liability Public Warrants.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WarrantLiabilityPublicWarrants" xlink:to="nn_WarrantLiabilityPublicWarrants_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_WarrantRedemptionDescription_lbl0" xml:lang="en-US">Warrant redemption, description.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WarrantRedemptionDescription" xlink:to="nn_WarrantRedemptionDescription_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_WarrantsAndWarrantLiabilityTextBlock_lbl0" xml:lang="en-US">The entire disclosure for warrants and warrant Liability.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WarrantsAndWarrantLiabilityTextBlock" xlink:to="nn_WarrantsAndWarrantLiabilityTextBlock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_WarrantsPurchasePricePerShare_lbl0" xml:lang="en-US">Warrants purchase price, per share.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WarrantsPurchasePricePerShare" xlink:to="nn_WarrantsPurchasePricePerShare_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_WarrantsToPurchase_lbl0" xml:lang="en-US">Number of warrants to purchase.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WarrantsToPurchase" xlink:to="nn_WarrantsToPurchase_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_WeightedAverageDistributionHurdlePerUnitUnitsOutstandings_lbl1" xml:lang="en-US">Weighted Average Distribution Hurdle per Unit, Units outstanding at January 1, 2020</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WeightedAverageDistributionHurdlePerUnitUnitsOutstandings" xlink:to="nn_WeightedAverageDistributionHurdlePerUnitUnitsOutstandings_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_WeightedAverageDistributionsHurdlePerUnitGranted_lbl0" xml:lang="en-US">Weighted Average Distribution Hurdle per Unit, Granted</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WeightedAverageDistributionsHurdlePerUnitGranted" xlink:to="nn_WeightedAverageDistributionsHurdlePerUnitGranted_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_WeightedAverageDistributionsHurdlePerUnitUnitsVested_lbl0" xml:lang="en-US">Weighted Average Distribution Hurdle per Unit, Units vested.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WeightedAverageDistributionsHurdlePerUnitUnitsVested" xlink:to="nn_WeightedAverageDistributionsHurdlePerUnitUnitsVested_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_WeightedAverageDistributionsHurdlesPerUnitCancelled_lbl0" xml:lang="en-US">Weighted Average Distribution Hurdle per Unit, Cancelled</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WeightedAverageDistributionsHurdlesPerUnitCancelled" xlink:to="nn_WeightedAverageDistributionsHurdlesPerUnitCancelled_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_WeightedAverageGrantDateFairValueOfProfitsInterestUnitsGranted_lbl0" xml:lang="en-US">Weighted average grant date fair value of Profits Interest Units granted.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WeightedAverageGrantDateFairValueOfProfitsInterestUnitsGranted" xlink:to="nn_WeightedAverageGrantDateFairValueOfProfitsInterestUnitsGranted_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_WeightedAverageGrantDateFairValueOfUnitOptionsGranted_lbl0" xml:lang="en-US">Weighted average grant date fair value of Unit Options granted.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WeightedAverageGrantDateFairValueOfUnitOptionsGranted" xlink:to="nn_WeightedAverageGrantDateFairValueOfUnitOptionsGranted_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_WeightedAverageGrantDateFairValueUnitsVested_lbl0" xml:lang="en-US">Weighted-Average Grant-Date Fair Value, Units vested</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WeightedAverageGrantDateFairValueUnitsVested" xlink:to="nn_WeightedAverageGrantDateFairValueUnitsVested_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_WeightedAverageGrantDateFairValuesBeginningBalance_lbl1" xml:lang="en-US">Weighted-Average Grant-Date Fair Value, Beginning Balance.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WeightedAverageGrantDateFairValuesBeginningBalance" xlink:to="nn_WeightedAverageGrantDateFairValuesBeginningBalance_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_WeightedAverageNumberOfSharesCommonStock_lbl0" xml:lang="en-US">Weighted average shares.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WeightedAverageNumberOfSharesCommonStock" xlink:to="nn_WeightedAverageNumberOfSharesCommonStock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_WeightedAverageUnitsBasicAndDilutedinShares_lbl0" xml:lang="en-US">Number of shares weighted average units &#8211; basic and diluted.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WeightedAverageUnitsBasicAndDilutedinShares" xlink:to="nn_WeightedAverageUnitsBasicAndDilutedinShares_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_WeightedaveragePeriodOver_lbl0" xml:lang="en-US">Weighted-average period over.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WeightedaveragePeriodOver" xlink:to="nn_WeightedaveragePeriodOver_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_WeightedaveragedPeriodOver_lbl0" xml:lang="en-US">Weighted-average period over.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WeightedaveragedPeriodOver" xlink:to="nn_WeightedaveragedPeriodOver_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_WorkingCapital_lbl0" xml:lang="en-US">Working capital amount.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WorkingCapital" xlink:to="nn_WorkingCapital_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_WorkingCapitalLoan_lbl0" xml:lang="en-US">The amount of working capital loan.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WorkingCapitalLoan" xlink:to="nn_WorkingCapitalLoan_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="nn_WorkingCapitalLoans_lbl0" xml:lang="en-US">Amount of working capital loans.</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WorkingCapitalLoans" xlink:to="nn_WorkingCapitalLoans_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_DescriptionOfWarrants_lbl1" xml:lang="en-US">DescriptionOfWarrants</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_DescriptionOfWarrants" xlink:to="nn_DescriptionOfWarrants_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_WarrantLiabilityPrivatePlacementWarrants_lbl1" xml:lang="en-US">WarrantLiabilityPrivatePlacementWarrants</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nn_WarrantLiabilityPrivatePlacementWarrants" xlink:to="nn_WarrantLiabilityPrivatePlacementWarrants_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nn_BasicAndDilutedNetIncomePerShareRedeemableClassACommonStock_lbl0" xml:lang="en-US">BasicAndDilutedNetIncomePerShareRedeemableClassACommonStock</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xlink:to="us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueOptionQuantitativeDisclosuresTextBlock_lbl0" xml:lang="en-US">Fair Value Option, Disclosures [Table Text Block]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueOptionQuantitativeDisclosuresTextBlock" xlink:to="us-gaap_FairValueOptionQuantitativeDisclosuresTextBlock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_lbl1" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockSharesOutstanding_lbl0" xml:lang="en-US">Preferred Stock, Shares Outstanding</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockSharesOutstanding" xlink:to="us-gaap_PreferredStockSharesOutstanding_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueInputsLevel2Member_lbl1" xml:lang="en-US">Fair Value, Inputs, Level 2 [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueInputsLevel2Member" xlink:to="us-gaap_FairValueInputsLevel2Member_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_lbl0" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FiniteLivedIntangibleAssetsNet_lbl0" xml:lang="en-US">Finite-Lived Intangible Assets, Net</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsNet" xlink:to="us-gaap_FiniteLivedIntangibleAssetsNet_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TemporaryEquityCarryingAmountAttributableToParent_lbl0" xml:lang="en-US">Temporary Equity, Carrying Amount, Attributable to Parent</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TemporaryEquityCarryingAmountAttributableToParent" xlink:to="us-gaap_TemporaryEquityCarryingAmountAttributableToParent_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl2" xml:lang="en-US">Net Cash Provided by (Used in) Financing Activities [Abstract]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_lbl2" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SharesIssuedPricePerShare_lbl0" xml:lang="en-US">Shares Issued, Price Per Share</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharesIssuedPricePerShare" xlink:to="us-gaap_SharesIssuedPricePerShare_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLossCarryforwards_lbl0" xml:lang="en-US">Operating Loss Carryforwards</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl0" xml:lang="en-US">Share-based Payment Arrangement, Expense</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AllocatedShareBasedCompensationExpense" xlink:to="us-gaap_AllocatedShareBasedCompensationExpense_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MarketableSecuritiesNoncurrent_lbl0" xml:lang="en-US">Marketable Securities, Noncurrent</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MarketableSecuritiesNoncurrent" xlink:to="us-gaap_MarketableSecuritiesNoncurrent_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredUnitsAuthorized_lbl0" xml:lang="en-US">Preferred Units, Authorized</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredUnitsAuthorized" xlink:to="us-gaap_PreferredUnitsAuthorized_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityIncorporationStateCountryCode_lbl0" xml:lang="en-US">Entity Incorporation, State or Country Code</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityIncorporationStateCountryCode" xlink:to="dei_EntityIncorporationStateCountryCode_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredTaxAssetsLiabilitiesNet_lbl0" xml:lang="en-US">Deferred Tax Assets, Net</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsLiabilitiesNet" xlink:to="us-gaap_DeferredTaxAssetsLiabilitiesNet_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsAbstract_lbl1" xml:lang="en-US">Assets [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsAbstract" xlink:to="us-gaap_AssetsAbstract_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LoansPayable_lbl0" xml:lang="en-US">Loans Payable</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LoansPayable" xlink:to="us-gaap_LoansPayable_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InvestmentPolicyTextBlock_lbl0" xml:lang="en-US">Investment, Policy [Policy Text Block]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentPolicyTextBlock" xlink:to="us-gaap_InvestmentPolicyTextBlock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DepreciationAndAmortization_lbl0" xml:lang="en-US">Depreciation, Depletion and Amortization, Nonproduction</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DepreciationAndAmortization" xlink:to="us-gaap_DepreciationAndAmortization_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccountsPayableAndOtherAccruedLiabilitiesCurrent_lbl0" xml:lang="en-US">Accounts Payable and Other Accrued Liabilities, Current</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsPayableAndOtherAccruedLiabilitiesCurrent" xlink:to="us-gaap_AccountsPayableAndOtherAccruedLiabilitiesCurrent_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue_lbl0" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInDeposits_lbl0" xml:lang="en-US">Increase (Decrease) in Deposits</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInDeposits" xlink:to="us-gaap_IncreaseDecreaseInDeposits_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherOwnershipInterestsOfferingCosts_lbl0" xml:lang="en-US">Other Ownership Interests, Offering Costs</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherOwnershipInterestsOfferingCosts" xlink:to="us-gaap_OtherOwnershipInterestsOfferingCosts_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl0" xml:lang="en-US">Other Nonoperating Income (Expense)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherNonoperatingIncomeExpense" xlink:to="us-gaap_OtherNonoperatingIncomeExpense_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CurrentForeignTaxExpenseBenefit_lbl0" xml:lang="en-US">Current Foreign Tax Expense (Benefit)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CurrentForeignTaxExpenseBenefit" xlink:to="us-gaap_CurrentForeignTaxExpenseBenefit_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueDisclosuresTextBlock_lbl0" xml:lang="en-US">Fair Value Disclosures [Text Block]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueDisclosuresTextBlock" xlink:to="us-gaap_FairValueDisclosuresTextBlock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SeniorNotes_lbl0" xml:lang="en-US">Senior Notes</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock" xlink:to="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent_lbl0" xml:lang="en-US">Deferred Compensation Liability, Classified, Noncurrent</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent" xlink:to="us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent_lbl0"/>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockSharesIssued" xlink:to="us-gaap_PreferredStockSharesIssued_lbl0"/>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding_lbl1"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfAccountsPayableAndAccruedLiabilitiesTableTextBlock_lbl0" xml:lang="en-US">Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl1" xml:lang="en-US">Stock Issued During Period, Shares, New Issues</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilitiesAbstract_lbl0" xml:lang="en-US">Increase (Decrease) in Accrued Liabilities [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInAccruedLiabilitiesAbstract" xlink:to="us-gaap_IncreaseDecreaseInAccruedLiabilitiesAbstract_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl0" xml:lang="en-US">Net Cash Provided by (Used in) Investing Activities</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="srt_MaximumMember_lbl0" xml:lang="en-US">Maximum [Member]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CapitalizedComputerSoftwareGross_lbl0" xml:lang="en-US">Capitalized Computer Software, Gross</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilities_lbl0" xml:lang="en-US">Increase (Decrease) in Accrued Liabilities</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="srt_MinimumMember_lbl0" xml:lang="en-US">Minimum [Member]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionValuationMethodExpectedDividendRate_lbl0" xml:lang="en-US">Share-based Goods and Nonemployee Services Transaction, Valuation Method, Expected Dividend Rate</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionValuationMethodExpectedDividendRate" xlink:to="us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionValuationMethodExpectedDividendRate_lbl0"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DepositsMoneyMarketDeposits_lbl0" xml:lang="en-US">Deposits, Money Market Deposits</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherCommitment_lbl0" xml:lang="en-US">Other Commitment</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockholdersEquityAbstract_lbl2" xml:lang="en-US">Stockholders&apos; Equity Attributable to Parent [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityAbstract" xlink:to="us-gaap_StockholdersEquityAbstract_lbl2"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockholdersEquityNoteDisclosureTextBlock_lbl0" xml:lang="en-US">Stockholders&apos; Equity Note Disclosure [Text Block]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityNoteDisclosureTextBlock" xlink:to="us-gaap_StockholdersEquityNoteDisclosureTextBlock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GainsLossesOnExtinguishmentOfDebt_lbl0" xml:lang="en-US">Gain (Loss) on Extinguishment of Debt</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_WarrantsAndRightsOutstanding_lbl0" xml:lang="en-US">Warrants and Rights Outstanding</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WarrantsAndRightsOutstanding" xlink:to="us-gaap_WarrantsAndRightsOutstanding_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl0" xml:lang="en-US">Proceeds from Issuance of Common Stock</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:to="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_lbl0" xml:lang="en-US">Property, Plant and Equipment Disclosure [Text Block]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock" xlink:to="us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterestAndDividendIncomeSecuritiesOther_lbl0" xml:lang="en-US">Interest and Dividend Income, Securities, Operating, Other</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestAndDividendIncomeSecuritiesOther" xlink:to="us-gaap_InterestAndDividendIncomeSecuritiesOther_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LossContingencyDisclosures_lbl0" xml:lang="en-US">Contingencies Disclosure [Text Block]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LossContingencyDisclosures" xlink:to="us-gaap_LossContingencyDisclosures_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl0" xml:lang="en-US">Net Income (Loss) Available to Common Stockholders, Basic</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:to="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_lbl0" xml:lang="en-US">Deferred State and Local Income Tax Expense (Benefit)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit" xlink:to="us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_lbl0" xml:lang="en-US">Stock Issued During Period, Shares, Conversion of Convertible Securities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities" xlink:to="us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl0" xml:lang="en-US">New Accounting Pronouncements, Policy [Policy Text Block]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:to="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueMeasurementPolicyPolicyTextBlock_lbl0" xml:lang="en-US">Fair Value Measurement, Policy [Policy Text Block]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementPolicyPolicyTextBlock" xlink:to="us-gaap_FairValueMeasurementPolicyPolicyTextBlock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_lbl1" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeasesRentExpenseSubleaseRentals1_lbl0" xml:lang="en-US">Operating Leases, Rent Expense, Sublease Rentals</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesRentExpenseSubleaseRentals1" xlink:to="us-gaap_OperatingLeasesRentExpenseSubleaseRentals1_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SaleOfStockPercentageOfOwnershipBeforeTransaction_lbl0" xml:lang="en-US">Sale of Stock, Percentage of Ownership before Transaction</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SaleOfStockPercentageOfOwnershipBeforeTransaction" xlink:to="us-gaap_SaleOfStockPercentageOfOwnershipBeforeTransaction_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodValueOther_lbl1" xml:lang="en-US">Stock Issued During Period, Value, Other</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueOther" xlink:to="us-gaap_StockIssuedDuringPeriodValueOther_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_lbl0" xml:lang="en-US">Cash and Cash Equivalents, Period Increase (Decrease)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:to="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty_lbl0" xml:lang="en-US">Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty" xlink:to="us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfDebtTableTextBlock_lbl0" xml:lang="en-US">Schedule of Debt [Table Text Block]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfDebtTableTextBlock" xlink:to="us-gaap_ScheduleOfDebtTableTextBlock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredUnitsCumulativeCashDistributions_lbl0" xml:lang="en-US">Preferred Units, Cumulative Cash Distributions</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredUnitsCumulativeCashDistributions" xlink:to="us-gaap_PreferredUnitsCumulativeCashDistributions_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_lbl1" xml:lang="en-US">Sale of Stock, Number of Shares Issued in Transaction</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:to="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_lbl0" xml:lang="en-US">Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_lbl0" xml:lang="en-US">Share-based Payment Arrangement, Option, Activity [Table Text Block]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock" xlink:to="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_lbl0" xml:lang="en-US">Property, Plant and Equipment, Policy [Policy Text Block]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock" xlink:to="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodSharesConversionOfUnits_lbl0" xml:lang="en-US">Stock Issued During Period, Shares, Conversion of Units</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="srt_ScheduleOfCondensedFinancialStatementsTableTextBlock_lbl0" xml:lang="en-US">Condensed Financial Statements [Table Text Block]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetRetirementObligation_lbl1" xml:lang="en-US">Asset Retirement Obligation</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SecuritiesBorrowed_lbl0" xml:lang="en-US">Securities Borrowed</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl1" xml:lang="en-US">Fair Value, Inputs, Level 3 [Member]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentRedemptionDescription_lbl0" xml:lang="en-US">Debt Instrument, Redemption, Description</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_lbl0" xml:lang="en-US">Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:to="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_lbl0" xml:lang="en-US">Deferred Tax Assets, Operating Loss Carryforwards</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsOperatingLossCarryforwards" xlink:to="us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentTextBlock_lbl0" xml:lang="en-US">Property, Plant and Equipment [Table Text Block]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentTextBlock" xlink:to="us-gaap_PropertyPlantAndEquipmentTextBlock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EquityFairValueAdjustment_lbl2" xml:lang="en-US">Equity, Fair Value Adjustment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityFairValueAdjustment" xlink:to="us-gaap_EquityFairValueAdjustment_lbl2"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs_lbl0" xml:lang="en-US">Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs" xlink:to="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherOwnershipInterestsUnitsOutstanding_lbl0" xml:lang="en-US">Other Ownership Interests, Units Outstanding</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherOwnershipInterestsUnitsOutstanding" xlink:to="us-gaap_OtherOwnershipInterestsUnitsOutstanding_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock_lbl0" xml:lang="en-US">Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock" xlink:to="us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockLiquidationPreferenceValue_lbl0" xml:lang="en-US">Preferred Stock, Liquidation Preference, Value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockLiquidationPreferenceValue" xlink:to="us-gaap_PreferredStockLiquidationPreferenceValue_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccruedBonusesCurrentAndNoncurrent_lbl0" xml:lang="en-US">Accrued Bonuses</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccruedBonusesCurrentAndNoncurrent" xlink:to="us-gaap_AccruedBonusesCurrentAndNoncurrent_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl0" xml:lang="en-US">Accumulated Other Comprehensive Income (Loss), Net of Tax</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:to="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_UnrealizedGainLossOnDerivatives_lbl0" xml:lang="en-US">Unrealized Gain (Loss) on Derivatives</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnrealizedGainLossOnDerivatives" xlink:to="us-gaap_UnrealizedGainLossOnDerivatives_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfOtherCurrentAssetsTableTextBlock_lbl0" xml:lang="en-US">Schedule of Other Current Assets [Table Text Block]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfOtherCurrentAssetsTableTextBlock" xlink:to="us-gaap_ScheduleOfOtherCurrentAssetsTableTextBlock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsHeldInTrust_lbl0" xml:lang="en-US">Assets Held-in-trust</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsHeldInTrust" xlink:to="us-gaap_AssetsHeldInTrust_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingAssetsAndLiabilitiesNetAbstract_lbl1" xml:lang="en-US">Increase (Decrease) in Other Operating Assets and Liabilities, Net [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInOtherOperatingAssetsAndLiabilitiesNetAbstract" xlink:to="us-gaap_IncreaseDecreaseInOtherOperatingAssetsAndLiabilitiesNetAbstract_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredCompensationArrangementWithIndividualSharesAuthorizedForIssuance_lbl0" xml:lang="en-US">Deferred Compensation Arrangement with Individual, Shares Authorized for Issuance</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredCompensationArrangementWithIndividualSharesAuthorizedForIssuance" xlink:to="us-gaap_DeferredCompensationArrangementWithIndividualSharesAuthorizedForIssuance_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromRelatedPartyDebt_lbl0" xml:lang="en-US">Proceeds from Related Party Debt</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromRelatedPartyDebt" xlink:to="us-gaap_ProceedsFromRelatedPartyDebt_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OfficeEquipmentMember_lbl1" xml:lang="en-US">Office Equipment [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OfficeEquipmentMember" xlink:to="us-gaap_OfficeEquipmentMember_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_lbl2" xml:lang="en-US">Weighted Average Number of Shares Outstanding, Basic and Diluted</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted" xlink:to="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_lbl2"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock_lbl0" xml:lang="en-US">Accounts Payable and Accrued Liabilities Disclosure [Text Block]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock" xlink:to="us-gaap_AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock_lbl0" xml:lang="en-US">Schedule of Finite-Lived Intangible Assets [Table Text Block]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock" xlink:to="us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetRetirementObligationLiabilitiesSettled_lbl0" xml:lang="en-US">Asset Retirement Obligation, Liabilities Settled</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetRetirementObligationLiabilitiesSettled" xlink:to="us-gaap_AssetRetirementObligationLiabilitiesSettled_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember_lbl0" xml:lang="en-US">AOCI Attributable to Parent [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:to="us-gaap_AccumulatedOtherComprehensiveIncomeMember_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrent_lbl0" xml:lang="en-US">Other Accrued Liabilities, Current</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAccruedLiabilitiesCurrent" xlink:to="us-gaap_OtherAccruedLiabilitiesCurrent_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SegmentReportingPolicyPolicyTextBlock_lbl0" xml:lang="en-US">Segment Reporting, Policy [Policy Text Block]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SegmentReportingPolicyPolicyTextBlock" xlink:to="us-gaap_SegmentReportingPolicyPolicyTextBlock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_DocumentType_lbl0" xml:lang="en-US">Document Type</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ComprehensiveIncomeNetOfTax_lbl0" xml:lang="en-US">Comprehensive Income (Loss), Net of Tax, Attributable to Parent</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ComprehensiveIncomeNetOfTax" xlink:to="us-gaap_ComprehensiveIncomeNetOfTax_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentForAdministrativeFees_lbl0" xml:lang="en-US">Payment for Administrative Fees</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentForAdministrativeFees" xlink:to="us-gaap_PaymentForAdministrativeFees_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesAbstract_lbl0" xml:lang="en-US">Liabilities [Abstract]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAbstract" xlink:to="us-gaap_LiabilitiesAbstract_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RelatedPartyTransactionsDisclosureTextBlock_lbl0" xml:lang="en-US">Related Party Transactions Disclosure [Text Block]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionsDisclosureTextBlock" xlink:to="us-gaap_RelatedPartyTransactionsDisclosureTextBlock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherExpenses_lbl0" xml:lang="en-US">Other Expenses</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherExpenses" xlink:to="us-gaap_OtherExpenses_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SecuredDebt_lbl0" xml:lang="en-US">Secured Debt</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_lbl0" xml:lang="en-US">Effective Income Tax Rate Reconciliation, Other Adjustments, Percent</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments" xlink:to="us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherAssets_lbl0" xml:lang="en-US">Other Assets</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAssets" xlink:to="us-gaap_OtherAssets_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockholdersEquity_lbl3" xml:lang="en-US">Stockholders&apos; Equity Attributable to Parent</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquity" xlink:to="us-gaap_StockholdersEquity_lbl3"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsHeldInTrustCurrent_lbl1" xml:lang="en-US">Assets Held-in-trust, Current</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsHeldInTrustCurrent" xlink:to="us-gaap_AssetsHeldInTrustCurrent_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentOwnedAccumulatedDepreciation_lbl0" xml:lang="en-US">Property, Plant, and Equipment, Owned, Accumulated Depreciation</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentOwnedAccumulatedDepreciation" xlink:to="us-gaap_PropertyPlantAndEquipmentOwnedAccumulatedDepreciation_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_lbl0" xml:lang="en-US">Lessee, Operating Lease, Liability, to be Paid, Year Two</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockVotingRights_lbl0" xml:lang="en-US">Preferred Stock, Voting Rights</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockVotingRights" xlink:to="us-gaap_PreferredStockVotingRights_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice_lbl1" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Exercise Price</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsHeldInTrustNoncurrent_lbl1" xml:lang="en-US">Assets Held-in-trust, Noncurrent</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsHeldInTrustNoncurrent" xlink:to="us-gaap_AssetsHeldInTrustNoncurrent_lbl1"/>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodSharesOther_lbl0" xml:lang="en-US">Stock Issued During Period, Shares, Other</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesOther" xlink:to="us-gaap_StockIssuedDuringPeriodSharesOther_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl1" xml:lang="en-US">Common Stock, Shares Authorized</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesAuthorized" xlink:to="us-gaap_CommonStockSharesAuthorized_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MarketableSecuritiesUnrealizedGainLoss_lbl0" xml:lang="en-US">Marketable Securities, Unrealized Gain (Loss)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MarketableSecuritiesUnrealizedGainLoss" xlink:to="us-gaap_MarketableSecuritiesUnrealizedGainLoss_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest_lbl2" xml:lang="en-US">Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueAdjustmentOfWarrants_lbl3" xml:lang="en-US">Fair Value Adjustment of Warrants</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAdjustmentOfWarrants" xlink:to="us-gaap_FairValueAdjustmentOfWarrants_lbl3"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_lbl1" xml:lang="en-US">Schedule of Deferred Tax Assets and Liabilities [Table Text Block]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdjustmentForAmortization_lbl0" xml:lang="en-US">Amortization</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TaxCreditCarryforwardValuationAllowance_lbl0" xml:lang="en-US">Tax Credit Carryforward, Valuation Allowance</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TaxCreditCarryforwardValuationAllowance" xlink:to="us-gaap_TaxCreditCarryforwardValuationAllowance_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TemporaryEquityRedemptionPricePerShare_lbl1" xml:lang="en-US">Temporary Equity, Redemption Price Per Share</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TemporaryEquityRedemptionPricePerShare" xlink:to="us-gaap_TemporaryEquityRedemptionPricePerShare_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NotesPayable_lbl0" xml:lang="en-US">Notes Payable</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TaxAdjustmentsSettlementsAndUnusualProvisions_lbl0" xml:lang="en-US">Tax Adjustments, Settlements, and Unusual Provisions</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TaxAdjustmentsSettlementsAndUnusualProvisions" xlink:to="us-gaap_TaxAdjustmentsSettlementsAndUnusualProvisions_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TemporaryEquityAccretionToRedemptionValue_lbl1" xml:lang="en-US">Temporary Equity, Accretion to Redemption Value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TemporaryEquityAccretionToRedemptionValue" xlink:to="us-gaap_TemporaryEquityAccretionToRedemptionValue_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl0" xml:lang="en-US">Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:to="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdditionalPaidInCapitalCommonStock_lbl0" xml:lang="en-US">Additional Paid in Capital, Common Stock</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdditionalPaidInCapitalCommonStock" xlink:to="us-gaap_AdditionalPaidInCapitalCommonStock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SaleOfStockConsiderationReceivedOnTransaction_lbl1" xml:lang="en-US">Sale of Stock, Consideration Received on Transaction</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SaleOfStockConsiderationReceivedOnTransaction" xlink:to="us-gaap_SaleOfStockConsiderationReceivedOnTransaction_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl1" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterestExpenseSecuritySoldUnderAgreementToRepurchaseIncreaseDecrease_lbl0" xml:lang="en-US">Interest Expense, Security Sold under Agreement to Repurchase, Increase (Decrease)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestExpenseSecuritySoldUnderAgreementToRepurchaseIncreaseDecrease" xlink:to="us-gaap_InterestExpenseSecuritySoldUnderAgreementToRepurchaseIncreaseDecrease_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_lbl0" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CostOfSalesPolicyTextBlock_lbl0" xml:lang="en-US">Cost of Goods and Service [Policy Text Block]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CostOfSalesPolicyTextBlock" xlink:to="us-gaap_CostOfSalesPolicyTextBlock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_lbl0" xml:lang="en-US">Share-based Payment Arrangement [Text Block]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock" xlink:to="us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_lbl0" xml:lang="en-US">Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock" xlink:to="us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FiniteLivedIntangibleAssetUsefulLife_lbl1" xml:lang="en-US">Finite-Lived Intangible Asset, Useful Life</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:to="us-gaap_FiniteLivedIntangibleAssetUsefulLife_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdjustmentOfWarrantsGrantedForServices_lbl0" xml:lang="en-US">Adjustment of Warrants Granted for Services</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdjustmentOfWarrantsGrantedForServices" xlink:to="us-gaap_AdjustmentOfWarrantsGrantedForServices_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueInputsLevel1Member_lbl1" xml:lang="en-US">Fair Value, Inputs, Level 1 [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueInputsLevel1Member" xlink:to="us-gaap_FairValueInputsLevel1Member_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl0" xml:lang="en-US">Debt Instrument, Interest Rate, Stated Percentage</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:to="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice_lbl0" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockMember_lbl1" xml:lang="en-US">Common Stock [Member]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl0" xml:lang="en-US">Property, Plant and Equipment, Gross</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentGross" xlink:to="us-gaap_PropertyPlantAndEquipmentGross_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MinimumLeasePaymentsSaleLeasebackTransactions_lbl0" xml:lang="en-US">Minimum Lease Payments, Sale Leaseback Transactions</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MinimumLeasePaymentsSaleLeasebackTransactions" xlink:to="us-gaap_MinimumLeasePaymentsSaleLeasebackTransactions_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_lbl0" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccountsPayableCurrent_lbl0" xml:lang="en-US">Accounts Payable, Current</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityFilerCategory_lbl0" xml:lang="en-US">Entity Filer Category</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityFilerCategory" xlink:to="dei_EntityFilerCategory_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_WarrantsAndRightsOutstandingTerm_lbl0" xml:lang="en-US">Warrants and Rights Outstanding, Term</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WarrantsAndRightsOutstandingTerm" xlink:to="us-gaap_WarrantsAndRightsOutstandingTerm_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AmortizationOfFinancingCostsAndDiscounts_lbl0" xml:lang="en-US">Amortization of Debt Issuance Costs and Discounts</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AmortizationOfFinancingCostsAndDiscounts" xlink:to="us-gaap_AmortizationOfFinancingCostsAndDiscounts_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingIncomeLoss_lbl0" xml:lang="en-US">Operating Income (Loss)</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LeaseholdImprovementsMember_lbl0" xml:lang="en-US">Leasehold Improvements [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LeaseholdImprovementsMember" xlink:to="us-gaap_LeaseholdImprovementsMember_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncentiveDistributionDistributionPerUnit_lbl0" xml:lang="en-US">Incentive Distribution, Distribution Per Unit</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncentiveDistributionDistributionPerUnit" xlink:to="us-gaap_IncentiveDistributionDistributionPerUnit_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock_lbl0" xml:lang="en-US">Foreign Currency Transactions and Translations Policy [Policy Text Block]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock" xlink:to="us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_lbl0" xml:lang="en-US">Foreign Currency Transaction Gain (Loss), before Tax</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RepaymentsOfConvertibleDebt_lbl0" xml:lang="en-US">Repayments of Convertible Debt</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PrepaidRent_lbl0" xml:lang="en-US">Prepaid Rent</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl1" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodSharesIssuedForServices_lbl0" xml:lang="en-US">Stock Issued During Period, Shares, Issued for Services</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CostsIncurredDevelopmentCosts_lbl0" xml:lang="en-US">Costs Incurred, Development Costs</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EarningsPerShareBasicAndDiluted_lbl1" xml:lang="en-US">Earnings Per Share, Basic and Diluted</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EmployeeBenefitsAndShareBasedCompensation_lbl1" xml:lang="en-US">Employee Benefits and Share-based Compensation</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl1" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl0" xml:lang="en-US">Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:to="us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetIncomeLossFromDiscontinuedOperationsAvailableToCommonShareholdersBasic_lbl0" xml:lang="en-US">Net Income (Loss) from Discontinued Operations Available to Common Shareholders, Basic</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_lbl0" xml:lang="en-US">Lessee, Operating Lease, Liability, to be Paid, Year Four</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaidInKindInterest_lbl1" xml:lang="en-US">Paid-in-Kind Interest</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaidInKindInterest" xlink:to="us-gaap_PaidInKindInterest_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockValue_lbl1" xml:lang="en-US">Common Stock, Value, Issued</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockValue" xlink:to="us-gaap_CommonStockValue_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_lbl0" xml:lang="en-US">Lessee, Operating Lease, Liability, to be Paid, Year One</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_lbl0" xml:lang="en-US">Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet" xlink:to="us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_lbl0" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredTaxAssetsNet_lbl0" xml:lang="en-US">Deferred Tax Assets, Net of Valuation Allowance</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsNet" xlink:to="us-gaap_DeferredTaxAssetsNet_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommitmentsAndContingencies_lbl0" xml:lang="en-US">Commitments and Contingencies</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommitmentsAndContingencies" xlink:to="us-gaap_CommitmentsAndContingencies_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl1" xml:lang="en-US">Stock Issued During Period, Value, New Issues</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:to="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PresentValueOfFutureInsuranceProfitsAmortizationExpenseYearThree_lbl0" xml:lang="en-US">Present Value of Future Insurance Profits, Expected Amortization, Year Three</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PresentValueOfFutureInsuranceProfitsAmortizationExpenseYearThree" xlink:to="us-gaap_PresentValueOfFutureInsuranceProfitsAmortizationExpenseYearThree_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ConvertibleNotesPayable_lbl0" xml:lang="en-US">Convertible Notes Payable</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConvertibleNotesPayable" xlink:to="us-gaap_ConvertibleNotesPayable_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_Liabilities_lbl0" xml:lang="en-US">Liabilities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_Liabilities_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfShareBasedCompensationStockOptionsAndStockAppreciationRightsAwardActivityTableTextBlock_lbl0" xml:lang="en-US">Share-based Payment Arrangement, Option and Stock Appreciation Rights, Activity [Table Text Block]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfShareBasedCompensationStockOptionsAndStockAppreciationRightsAwardActivityTableTextBlock" xlink:to="us-gaap_ScheduleOfShareBasedCompensationStockOptionsAndStockAppreciationRightsAwardActivityTableTextBlock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings_lbl0" xml:lang="en-US">Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings" xlink:to="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ResearchAndDevelopmentExpense_lbl0" xml:lang="en-US">Research and Development Expense</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ResearchAndDevelopmentExpense" xlink:to="us-gaap_ResearchAndDevelopmentExpense_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CurrentFederalTaxExpenseBenefit_lbl0" xml:lang="en-US">Current Federal Tax Expense (Benefit)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CurrentFederalTaxExpenseBenefit" xlink:to="us-gaap_CurrentFederalTaxExpenseBenefit_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_USTreasurySecuritiesMember_lbl1" xml:lang="en-US">US Treasury Securities [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_USTreasurySecuritiesMember" xlink:to="us-gaap_USTreasurySecuritiesMember_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockRedeemedOrCalledDuringPeriodShares_lbl0" xml:lang="en-US">Stock Redeemed or Called During Period, Shares</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockRedeemedOrCalledDuringPeriodShares" xlink:to="us-gaap_StockRedeemedOrCalledDuringPeriodShares_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_lbl0" xml:lang="en-US">Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes" xlink:to="us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperations_lbl0" xml:lang="en-US">Effective Income Tax Rate Reconciliation, Percent</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:to="us-gaap_EffectiveIncomeTaxRateContinuingOperations_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsToAcquireHeldToMaturitySecurities_lbl0" xml:lang="en-US">Payments to Acquire Held-to-maturity Securities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquireHeldToMaturitySecurities" xlink:to="us-gaap_PaymentsToAcquireHeldToMaturitySecurities_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SeriesDPreferredStockMember_lbl0" xml:lang="en-US">Series D Preferred Stock [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SeriesDPreferredStockMember" xlink:to="us-gaap_SeriesDPreferredStockMember_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl1" xml:lang="en-US">Income Tax Expense (Benefit)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxExpenseBenefit" xlink:to="us-gaap_IncomeTaxExpenseBenefit_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherIntangibleAssetsNet_lbl1" xml:lang="en-US">Other Intangible Assets, Net</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherIntangibleAssetsNet" xlink:to="us-gaap_OtherIntangibleAssetsNet_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_UseOfEstimates_lbl0" xml:lang="en-US">Use of Estimates, Policy [Policy Text Block]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UseOfEstimates" xlink:to="us-gaap_UseOfEstimates_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrentAndNoncurrent_lbl0" xml:lang="en-US">Other Accrued Liabilities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAccruedLiabilitiesCurrentAndNoncurrent" xlink:to="us-gaap_OtherAccruedLiabilitiesCurrentAndNoncurrent_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RestrictedCashCurrent_lbl0" xml:lang="en-US">Restricted Cash, Current</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestrictedCashCurrent" xlink:to="us-gaap_RestrictedCashCurrent_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityRegistrantName_lbl0" xml:lang="en-US">Entity Registrant Name</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityRegistrantName" xlink:to="dei_EntityRegistrantName_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BasisOfAccountingPolicyPolicyTextBlock_lbl0" xml:lang="en-US">Basis of Accounting, Policy [Policy Text Block]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BasisOfAccountingPolicyPolicyTextBlock" xlink:to="us-gaap_BasisOfAccountingPolicyPolicyTextBlock_lbl0"/>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfAssetRetirementObligationsTableTextBlock_lbl0" xml:lang="en-US">Schedule of Asset Retirement Obligations [Table Text Block]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfAssetRetirementObligationsTableTextBlock" xlink:to="us-gaap_ScheduleOfAssetRetirementObligationsTableTextBlock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherResearchAndDevelopmentExpense_lbl0" xml:lang="en-US">Other Research and Development Expense</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredUnitsDescription_lbl0" xml:lang="en-US">Preferred Units, Description</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsequentEventsTextBlock_lbl0" xml:lang="en-US">Subsequent Events [Text Block]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_AmendmentFlag_lbl0" xml:lang="en-US">Amendment Flag</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment" xlink:to="us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IPOMember_lbl0" xml:lang="en-US">IPO [Member]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_Assets_lbl0" xml:lang="en-US">Assets</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsToAcquireOtherInvestments_lbl0" xml:lang="en-US">Payments to Acquire Other Investments</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityCentralIndexKey_lbl0" xml:lang="en-US">Entity Central Index Key</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_lbl2" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_lbl2"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdditionalPaidInCapital_lbl1" xml:lang="en-US">Additional Paid in Capital</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdditionalPaidInCapital" xlink:to="us-gaap_AdditionalPaidInCapital_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PrivatePlacementMember_lbl1" xml:lang="en-US">Private Placement [Member]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DueToAffiliateCurrentAndNoncurrent_lbl0" xml:lang="en-US">Due to Affiliate</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_lbl0" xml:lang="en-US">Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:to="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock_lbl0" xml:lang="en-US">Retirement Benefits [Text Block]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock" xlink:to="us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CostOfRevenue_lbl0" xml:lang="en-US">Cost of Revenue</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FlightEquipmentAccumulatedDepreciation_lbl0" xml:lang="en-US">Flight Equipment, Accumulated Depreciation</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FlightEquipmentAccumulatedDepreciation" xlink:to="us-gaap_FlightEquipmentAccumulatedDepreciation_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock_lbl0" xml:lang="en-US">Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock" xlink:to="us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_lbl0" xml:lang="en-US">Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock" xlink:to="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValueTableTextBlock_lbl0" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value [Table Text Block]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValueTableTextBlock" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValueTableTextBlock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GainsLossesOnRestructuringOfDebt_lbl0" xml:lang="en-US">Gains (Losses) on Restructuring of Debt</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ExtinguishmentOfDebtAmount_lbl0" xml:lang="en-US">Extinguishment of Debt, Amount</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromIssuanceOfPrivatePlacement_lbl1" xml:lang="en-US">Proceeds from Issuance of Private Placement</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceOfPrivatePlacement" xlink:to="us-gaap_ProceedsFromIssuanceOfPrivatePlacement_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockSharesIssued_lbl0" xml:lang="en-US">Common Stock, Shares, Issued</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities_lbl0" xml:lang="en-US">Proceeds from Sale and Maturity of Marketable Securities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities" xlink:to="us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DerivativeLiabilities_lbl1" xml:lang="en-US">Derivative Liability</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeLiabilities" xlink:to="us-gaap_DerivativeLiabilities_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_lbl0" xml:lang="en-US">Lessee, Operating Lease, Liability, Maturity [Table Text Block]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock" xlink:to="us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsCurrent_lbl0" xml:lang="en-US">Assets, Current</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesCurrent_lbl0" xml:lang="en-US">Liabilities, Current</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesCurrent" xlink:to="us-gaap_LiabilitiesCurrent_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_WeightedAverageNumberOfSharesCommonStockSubjectToRepurchaseOrCancellation_lbl0" xml:lang="en-US">Weighted Average Number of Shares, Common Stock Subject to Repurchase or Cancellation</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WeightedAverageNumberOfSharesCommonStockSubjectToRepurchaseOrCancellation" xlink:to="us-gaap_WeightedAverageNumberOfSharesCommonStockSubjectToRepurchaseOrCancellation_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterestIncomeOther_lbl0" xml:lang="en-US">Interest Income, Other</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestIncomeOther" xlink:to="us-gaap_InterestIncomeOther_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionValuationMethodRiskFreeInterestRate_lbl0" xml:lang="en-US">Share-based Goods and Nonemployee Services Transaction, Valuation Method, Risk Free Interest Rate</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionValuationMethodRiskFreeInterestRate" xlink:to="us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionValuationMethodRiskFreeInterestRate_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CapitalUnitsNetAmount_lbl0" xml:lang="en-US">Capital Units, Net Amount</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalUnitsNetAmount" xlink:to="us-gaap_CapitalUnitsNetAmount_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentExcludingLessorAssetUnderOperatingLeaseAccumulatedDepreciation_lbl0" xml:lang="en-US">Property, Plant, and Equipment, Excluding Lessor Asset under Operating Lease, Accumulated Depreciation</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentExcludingLessorAssetUnderOperatingLeaseAccumulatedDepreciation" xlink:to="us-gaap_PropertyPlantAndEquipmentExcludingLessorAssetUnderOperatingLeaseAccumulatedDepreciation_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MarketableSecuritiesTextBlock_lbl1" xml:lang="en-US">Marketable Securities [Table Text Block]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl0" xml:lang="en-US">Liabilities and Equity</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAndStockholdersEquity" xlink:to="us-gaap_LiabilitiesAndStockholdersEquity_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock_lbl0" xml:lang="en-US">Basis of Presentation and Significant Accounting Policies [Text Block]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_lbl0" xml:lang="en-US">Finite-Lived Intangible Assets, Accumulated Amortization</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:to="us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredCostsAndOtherAssets_lbl0" xml:lang="en-US">Deferred Costs and Other Assets</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_lbl0" xml:lang="en-US">Accounts Payable and Accrued Liabilities</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent" xlink:to="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionModificationOfTermsIncrementalCompensationCost_lbl0" xml:lang="en-US">Share-based Goods and Nonemployee Services Transaction, Modification of Terms, Incremental Compensation Cost</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DueToOtherRelatedPartiesClassifiedCurrent_lbl0" xml:lang="en-US">Due to Other Related Parties, Current</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DueToOtherRelatedPartiesClassifiedCurrent" xlink:to="us-gaap_DueToOtherRelatedPartiesClassifiedCurrent_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterestExpenseDebt_lbl0" xml:lang="en-US">Interest Expense, Debt</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl1" xml:lang="en-US">Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ConstructionMember_lbl0" xml:lang="en-US">Construction [Member]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl0" xml:lang="en-US">Commitments and Contingencies Disclosure [Text Block]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_lbl0" xml:lang="en-US">Proceeds from Sale of Property, Plant, and Equipment</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_lbl0" xml:lang="en-US">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SharesOutstanding_lbl2" xml:lang="en-US">Shares, Outstanding</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_lbl0" xml:lang="en-US">Operating Leases, Future Minimum Payments, Due Thereafter</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInDueToAffiliates_lbl0" xml:lang="en-US">Increase (Decrease) in Due to Affiliates</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_lbl0" xml:lang="en-US">Revenue from Contract with Customer, Excluding Assessed Tax</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherExpensesAbstract" xlink:to="us-gaap_OtherExpensesAbstract_lbl0"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueNetAssetLiability_lbl1" xml:lang="en-US">Fair Value, Net Asset (Liability)</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueNetAssetLiability" xlink:to="us-gaap_FairValueNetAssetLiability_lbl1"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherCostAndExpenseOperating_lbl0" xml:lang="en-US">Other Cost and Expense, Operating</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeTaxDisclosureTextBlock_lbl0" xml:lang="en-US">Income Tax Disclosure [Text Block]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesOtherThanLongtermDebtNoncurrent_lbl0" xml:lang="en-US">Liabilities, Other than Long-term Debt, Noncurrent</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares_lbl0" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromIssuanceInitialPublicOffering_lbl0" xml:lang="en-US">Proceeds from Issuance Initial Public Offering</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityEmergingGrowthCompany_lbl0" xml:lang="en-US">Entity Emerging Growth Company</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CurrentStateAndLocalTaxExpenseBenefit_lbl0" xml:lang="en-US">Current State and Local Tax Expense (Benefit)</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetRetirementObligationLiabilitiesIncurred_lbl0" xml:lang="en-US">Asset Retirement Obligation, Liabilities Incurred</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_Revenues_lbl0" xml:lang="en-US">Revenues</label>
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