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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_OtherOperatingIncomeExpensePolicyTextBlock" xml:lang="en-US">Other Operating Income Expense Policy [Text Block]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_OtherOperatingIncomeExpensePolicyTextBlock" xml:lang="en-US">Offering Costs</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_OtherOperatingIncomeExpensePolicyTextBlock" xml:lang="en-US">Other Operating Income (Expense), Policy</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_OtherOperatingIncomeExpensePolicyTextBlock" xlink:to="lab_unl_OtherOperatingIncomeExpensePolicyTextBlock" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashAndCashEquivalentsPolicyTextBlock" xlink:label="loc_us-gaap_CashAndCashEquivalentsPolicyTextBlock" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CashAndCashEquivalentsPolicyTextBlock" xml:lang="en-US">Cash and Cash Equivalents Policy [Text Block]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_CashAndCashEquivalentsPolicyTextBlock" xml:lang="en-US">Cash Equivalents</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAndCashEquivalentsPolicyTextBlock" xlink:to="lab_us-gaap_CashAndCashEquivalentsPolicyTextBlock" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PriorPeriodReclassificationAdjustmentDescription" xlink:label="loc_us-gaap_PriorPeriodReclassificationAdjustmentDescription" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PriorPeriodReclassificationAdjustmentDescription" xml:lang="en-US">Prior Period Reclassification Adjustment Description</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_PriorPeriodReclassificationAdjustmentDescription" xml:lang="en-US">Reclassification</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PriorPeriodReclassificationAdjustmentDescription" xlink:to="lab_us-gaap_PriorPeriodReclassificationAdjustmentDescription" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_UseOfEstimates" xlink:label="loc_us-gaap_UseOfEstimates" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_UseOfEstimates" xml:lang="en-US">Use Of Estimates</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_UseOfEstimates" xml:lang="en-US">Use of Estimates</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UseOfEstimates" xlink:to="lab_us-gaap_UseOfEstimates" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_BrokerageCommissionsTableTextBlock" xlink:label="loc_unl_BrokerageCommissionsTableTextBlock" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_BrokerageCommissionsTableTextBlock" xml:lang="en-US">Brokerage Commissions [Table Text Block]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_unl_BrokerageCommissionsTableTextBlock" xml:lang="en-US">Brokerage Commissions</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_BrokerageCommissionsTableTextBlock" xml:lang="en-US">Tabular disclosure of fees earned by the broker commission.</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_BrokerageCommissionsTableTextBlock" xlink:to="lab_unl_BrokerageCommissionsTableTextBlock" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_PerUnitPerformanceDataAndOtherSupplementalFinancialDataTableTextBlock" xlink:label="loc_unl_PerUnitPerformanceDataAndOtherSupplementalFinancialDataTableTextBlock" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_PerUnitPerformanceDataAndOtherSupplementalFinancialDataTableTextBlock" xml:lang="en-US">Per Unit Performance Data and Other Supplemental Financial Data Table [Text Block]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_PerUnitPerformanceDataAndOtherSupplementalFinancialDataTableTextBlock" xml:lang="en-US">Per Unit Performance Data and Other Supplemental Financial Data</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_PerUnitPerformanceDataAndOtherSupplementalFinancialDataTableTextBlock" xml:lang="en-US">Per Unit Performance Data and Other Supplemental Financial Data [Table Text Block]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_PerUnitPerformanceDataAndOtherSupplementalFinancialDataTableTextBlock" xlink:to="lab_unl_PerUnitPerformanceDataAndOtherSupplementalFinancialDataTableTextBlock" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="loc_us-gaap_StatementOfFinancialPositionAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_StatementOfFinancialPositionAbstract" xml:lang="en-US">Statement Of Financial Position [Abstract]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract" xlink:to="lab_us-gaap_StatementOfFinancialPositionAbstract" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_StatementTable" xml:lang="en-US">Statement [Table]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementTable" xlink:to="lab_us-gaap_StatementTable" />

    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_LegalEntityAxis" xml:lang="en-US">Legal Entity [Axis]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_LegalEntityAxis" xlink:to="lab_dei_LegalEntityAxis" />

    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntityDomain" xml:lang="en-US">Entity [Domain]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityDomain" xlink:to="lab_dei_EntityDomain" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_StatementLineItems" xml:lang="en-US">Statement [Line Items]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementLineItems" xlink:to="lab_us-gaap_StatementLineItems" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="loc_us-gaap_AssetsAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AssetsAbstract" xml:lang="en-US">Assets [Abstract]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_AssetsAbstract" xml:lang="en-US">Assets</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsAbstract" xlink:to="lab_us-gaap_AssetsAbstract" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue" xml:lang="en-US">Cash and Cash Equivalents, at Carrying Value, Total</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue" xml:lang="en-US">Cash and cash equivalents (Notes 2 and 5)</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue" xml:lang="en-US">Cash and Cash Equivalents, beginning of period</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue" xml:lang="en-US">Cash and Cash Equivalents, end of period</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:to="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FinancialInstrumentsOwnedAtFairValueAbstract" xlink:label="loc_us-gaap_FinancialInstrumentsOwnedAtFairValueAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FinancialInstrumentsOwnedAtFairValueAbstract" xml:lang="en-US">Financial Instruments Owned At Fair Value [Abstract]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_FinancialInstrumentsOwnedAtFairValueAbstract" xml:lang="en-US">Equity in trading accounts:</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancialInstrumentsOwnedAtFairValueAbstract" xlink:to="lab_us-gaap_FinancialInstrumentsOwnedAtFairValueAbstract" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Cash" xlink:label="loc_us-gaap_Cash" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_Cash" xml:lang="en-US">Cash</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_Cash" 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="loc_us-gaap_Cash" xlink:to="lab_us-gaap_Cash" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_UnrealizedGainLossOnOpenCommodityFuturesContracts" xlink:label="loc_unl_UnrealizedGainLossOnOpenCommodityFuturesContracts" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_UnrealizedGainLossOnOpenCommodityFuturesContracts" xml:lang="en-US">Unrealized Gain Loss On Open Commodity Futures Contracts</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_unl_UnrealizedGainLossOnOpenCommodityFuturesContracts" xml:lang="en-US">Unrealized gain (loss) on open commodity futures contracts</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_UnrealizedGainLossOnOpenCommodityFuturesContracts" xml:lang="en-US">Unrealized gain (loss) on open commodity futures contracts.</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_UnrealizedGainLossOnOpenCommodityFuturesContracts" xlink:to="lab_unl_UnrealizedGainLossOnOpenCommodityFuturesContracts" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DueFromOfficersOrStockholders" xlink:label="loc_us-gaap_DueFromOfficersOrStockholders" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DueFromOfficersOrStockholders" xml:lang="en-US">Due from Officers or Stockholders</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_DueFromOfficersOrStockholders" xml:lang="en-US">Receivable from General Partner (Note 3)</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DueFromOfficersOrStockholders" xlink:to="lab_us-gaap_DueFromOfficersOrStockholders" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DividendsReceivable" xlink:label="loc_us-gaap_DividendsReceivable" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DividendsReceivable" xml:lang="en-US">Dividends Receivable</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_DividendsReceivable" xml:lang="en-US">Dividends receivable</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DividendsReceivable" xlink:to="lab_us-gaap_DividendsReceivable" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ReceivableFromOfficersAndDirectorsForIssuanceOfCapitalStock" xlink:label="loc_us-gaap_ReceivableFromOfficersAndDirectorsForIssuanceOfCapitalStock" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ReceivableFromOfficersAndDirectorsForIssuanceOfCapitalStock" xml:lang="en-US">Receivable from Officers and Directors for Issuance of Capital Stock</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_ReceivableFromOfficersAndDirectorsForIssuanceOfCapitalStock" xml:lang="en-US">Directors&#39; fees and insurance receivable</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReceivableFromOfficersAndDirectorsForIssuanceOfCapitalStock" xlink:to="lab_us-gaap_ReceivableFromOfficersAndDirectorsForIssuanceOfCapitalStock" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PartnersCapitalNotesAbstract" xlink:label="loc_us-gaap_PartnersCapitalNotesAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PartnersCapitalNotesAbstract" xml:lang="en-US">Partners Capital Notes [Abstract]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_PartnersCapitalNotesAbstract" xml:lang="en-US">Liabilities and Partners&#39; Capital</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PartnersCapitalNotesAbstract" xlink:to="lab_us-gaap_PartnersCapitalNotesAbstract" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DueToOfficersOrStockholdersCurrentAndNoncurrent" xlink:label="loc_us-gaap_DueToOfficersOrStockholdersCurrentAndNoncurrent" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DueToOfficersOrStockholdersCurrentAndNoncurrent" xml:lang="en-US">Due to Officers or Stockholders</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_DueToOfficersOrStockholdersCurrentAndNoncurrent" xml:lang="en-US">General Partner management fees payable (Note 3)</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DueToOfficersOrStockholdersCurrentAndNoncurrent" xlink:to="lab_us-gaap_DueToOfficersOrStockholdersCurrentAndNoncurrent" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccruedProfessionalFeesCurrentAndNoncurrent" xlink:label="loc_us-gaap_AccruedProfessionalFeesCurrentAndNoncurrent" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AccruedProfessionalFeesCurrentAndNoncurrent" xml:lang="en-US">Accrued Professional Fees</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_AccruedProfessionalFeesCurrentAndNoncurrent" xml:lang="en-US">Professional fees payable</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccruedProfessionalFeesCurrentAndNoncurrent" xlink:to="lab_us-gaap_AccruedProfessionalFeesCurrentAndNoncurrent" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommissionsPayableToBrokerDealersAndClearingOrganizations" xlink:label="loc_us-gaap_CommissionsPayableToBrokerDealersAndClearingOrganizations" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CommissionsPayableToBrokerDealersAndClearingOrganizations" xml:lang="en-US">Commissions Payable To Broker Dealers and Clearing Organizations</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_CommissionsPayableToBrokerDealersAndClearingOrganizations" xml:lang="en-US">Brokerage commissions payable</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommissionsPayableToBrokerDealersAndClearingOrganizations" xlink:to="lab_us-gaap_CommissionsPayableToBrokerDealersAndClearingOrganizations" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_LicenseFeesPayableCurrentAndNoncurrent" xlink:label="loc_unl_LicenseFeesPayableCurrentAndNoncurrent" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_LicenseFeesPayableCurrentAndNoncurrent" xml:lang="en-US">License Fees Payable Current And Noncurrent</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_LicenseFeesPayableCurrentAndNoncurrent" xml:lang="en-US">License fees payable</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_LicenseFeesPayableCurrentAndNoncurrent" xml:lang="en-US">License fees payable current and noncurrent.</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_LicenseFeesPayableCurrentAndNoncurrent" xlink:to="lab_unl_LicenseFeesPayableCurrentAndNoncurrent" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaap_Liabilities" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_Liabilities" xml:lang="en-US">Liabilities, Total</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_Liabilities" xml:lang="en-US">Total liabilities</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Liabilities" xlink:to="lab_us-gaap_Liabilities" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="loc_us-gaap_CommitmentsAndContingencies" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CommitmentsAndContingencies" xml:lang="en-US">Commitments and Contingencies</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_CommitmentsAndContingencies" xml:lang="en-US">Commitments and Contingencies (Notes 3, 4 and 5)</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommitmentsAndContingencies" xlink:to="lab_us-gaap_CommitmentsAndContingencies" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GeneralPartnersCapitalAccount" xlink:label="loc_us-gaap_GeneralPartnersCapitalAccount" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_GeneralPartnersCapitalAccount" xml:lang="en-US">General Partners Capital Account</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_GeneralPartnersCapitalAccount" xml:lang="en-US">General Partner</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GeneralPartnersCapitalAccount" xlink:to="lab_us-gaap_GeneralPartnersCapitalAccount" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LimitedPartnersCapitalAccount" xlink:label="loc_us-gaap_LimitedPartnersCapitalAccount" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LimitedPartnersCapitalAccount" xml:lang="en-US">Limited Partners Capital Account</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_LimitedPartnersCapitalAccount" xml:lang="en-US">Limited Partners</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LimitedPartnersCapitalAccount" xlink:to="lab_us-gaap_LimitedPartnersCapitalAccount" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PartnersCapital" xlink:label="loc_us-gaap_PartnersCapital" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PartnersCapital" xml:lang="en-US">Partners Capital</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_PartnersCapital" xml:lang="en-US">Total Partners&#39; Capital</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="lab_us-gaap_PartnersCapital" xml:lang="en-US">Balances</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="lab_us-gaap_PartnersCapital" xml:lang="en-US">Balances</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PartnersCapital" xlink:to="lab_us-gaap_PartnersCapital" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PartnersCapitalAbstract" xlink:label="loc_us-gaap_PartnersCapitalAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PartnersCapitalAbstract" xml:lang="en-US">Partners Capital [Abstract]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_PartnersCapitalAbstract" xml:lang="en-US">Partners&#39; Capital</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PartnersCapitalAbstract" xlink:to="lab_us-gaap_PartnersCapitalAbstract" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding" xlink:label="loc_us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding" xml:lang="en-US">Limited Partners Capital Account Units Outstanding</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding" xml:lang="en-US">Limited Partners&#39; shares outstanding</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding" xlink:to="lab_us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_NetAssetValuePerUnit" xlink:label="loc_unl_NetAssetValuePerUnit" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_NetAssetValuePerUnit" xml:lang="en-US">Net Asset Value Per Unit</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_NetAssetValuePerUnit" xml:lang="en-US">Net asset value per share</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="lab_unl_NetAssetValuePerUnit" xml:lang="en-US">Net asset value, beginning of period</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="lab_unl_NetAssetValuePerUnit" xml:lang="en-US">Net asset value, end of period</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_NetAssetValuePerUnit" xml:lang="en-US">Net asset value per unit.</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_NetAssetValuePerUnit" xlink:to="lab_unl_NetAssetValuePerUnit" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_MarketValuePerUnit" xlink:label="loc_unl_MarketValuePerUnit" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_MarketValuePerUnit" xml:lang="en-US">Market Value Per Unit</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_MarketValuePerUnit" xml:lang="en-US">Market value per share</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_MarketValuePerUnit" xml:lang="en-US">Market value per unit.</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_MarketValuePerUnit" xlink:to="lab_unl_MarketValuePerUnit" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementInputsDisclosureTextBlock" xlink:label="loc_us-gaap_FairValueMeasurementInputsDisclosureTextBlock" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FairValueMeasurementInputsDisclosureTextBlock" xml:lang="en-US">Fair Value Measurement Inputs Disclosure [Text Block]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_FairValueMeasurementInputsDisclosureTextBlock" xml:lang="en-US">Valuation of Securities Using the Fair Value Hierarchy</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementInputsDisclosureTextBlock" xlink:to="lab_us-gaap_FairValueMeasurementInputsDisclosureTextBlock" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock" xlink:label="loc_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock" xml:lang="en-US">Schedule Of Derivative Instruments In Statement Of Financial Position Fair Value [Text Block]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock" xml:lang="en-US">Fair Value of Derivative Instruments</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock" xlink:to="lab_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock" xlink:label="loc_us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock" xml:lang="en-US">Schedule Of Derivative Instruments Gain Loss In Statement Of Financial Performance [Text Block]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock" xml:lang="en-US">Effect of Derivative Instruments on the Condensed Statements of Operations</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock" xlink:to="lab_us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_DisclosureOrganizationAndBusinessAdditionalInformationAbstract" xlink:label="loc_unl_DisclosureOrganizationAndBusinessAdditionalInformationAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_DisclosureOrganizationAndBusinessAdditionalInformationAbstract" xml:lang="en-US">Disclosure Organization and Business Additional Information [Abstract]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_DisclosureOrganizationAndBusinessAdditionalInformationAbstract" xml:lang="en-US">Disclosure - Organization and Business - Additional Information [Abstract]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_DisclosureOrganizationAndBusinessAdditionalInformationAbstract" xlink:to="lab_unl_DisclosureOrganizationAndBusinessAdditionalInformationAbstract" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTable" xlink:label="loc_unl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTable" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTable" xml:lang="en-US">Organization Consolidation and Presentation Of Financial Statements Disclosure [Table]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTable" xml:lang="en-US">Organization, Consolidation and Presentation of Financial Statements Disclosure [Table]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTable" xlink:to="lab_unl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTable" />

    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_InvestmentAxis" xlink:label="loc_invest_InvestmentAxis" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_invest_InvestmentAxis" xml:lang="en-US">Investment [Axis]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_invest_InvestmentAxis" xlink:to="lab_invest_InvestmentAxis" />

    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_InvestmentDomain" xlink:label="loc_invest_InvestmentDomain" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_invest_InvestmentDomain" xml:lang="en-US">Investment [Domain]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_invest_InvestmentDomain" xlink:to="lab_invest_InvestmentDomain" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_PeriodAxis" xlink:label="loc_unl_PeriodAxis" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_PeriodAxis" xml:lang="en-US">Period [Axis]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_PeriodAxis" xml:lang="en-US">Period [Axis]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_PeriodAxis" xlink:to="lab_unl_PeriodAxis" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_PeriodDomain" xlink:label="loc_unl_PeriodDomain" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_PeriodDomain" xml:lang="en-US">Period [Domain]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_PeriodDomain" xml:lang="en-US">Period [Domain]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_PeriodDomain" xlink:to="lab_unl_PeriodDomain" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InvestmentTypeAxis" xlink:label="loc_us-gaap_InvestmentTypeAxis" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_InvestmentTypeAxis" xml:lang="en-US">Investment Type [Axis]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentTypeAxis" xlink:to="lab_us-gaap_InvestmentTypeAxis" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_InvestmentTypeCategorizationMember" xml:lang="en-US">Investment Type Categorization [Domain]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember" xlink:to="lab_us-gaap_InvestmentTypeCategorizationMember" />

    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_InvestmentGeographicRegionAxis" xlink:label="loc_invest_InvestmentGeographicRegionAxis" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_invest_InvestmentGeographicRegionAxis" xml:lang="en-US">Investment Geographic Region [Axis]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_invest_InvestmentGeographicRegionAxis" xlink:to="lab_invest_InvestmentGeographicRegionAxis" />

    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_InvestmentGeographicRegionDomain" xlink:label="loc_invest_InvestmentGeographicRegionDomain" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_invest_InvestmentGeographicRegionDomain" xml:lang="en-US">Investment Geographic Region [Domain]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_invest_InvestmentGeographicRegionDomain" xlink:to="lab_invest_InvestmentGeographicRegionDomain" />

    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_InvestmentSecuritiesClassAxis" xlink:label="loc_invest_InvestmentSecuritiesClassAxis" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_invest_InvestmentSecuritiesClassAxis" xml:lang="en-US">Investment Securities Class [Axis]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_invest_InvestmentSecuritiesClassAxis" xlink:to="lab_invest_InvestmentSecuritiesClassAxis" />

    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_InvestmentSecuritiesClassDomain" xlink:label="loc_invest_InvestmentSecuritiesClassDomain" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_invest_InvestmentSecuritiesClassDomain" xml:lang="en-US">Investment Securities Class [Domain]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_invest_InvestmentSecuritiesClassDomain" xlink:to="lab_invest_InvestmentSecuritiesClassDomain" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_CreationBasketsMember" xlink:label="loc_unl_CreationBasketsMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_CreationBasketsMember" xml:lang="en-US">Creation Baskets [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_CreationBasketsMember" xml:lang="en-US">Creation Baskets [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_CreationBasketsMember" xml:lang="en-US">Creation Baskets [Member]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_CreationBasketsMember" xlink:to="lab_unl_CreationBasketsMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureLineItems" xlink:label="loc_unl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureLineItems" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureLineItems" xml:lang="en-US">Organization Consolidation and Presentation Of Financial Statements Disclosure [Line Items]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureLineItems" xml:lang="en-US">Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureLineItems" xml:lang="en-US">Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureLineItems" xlink:to="lab_unl_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureLineItems" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_NumberOfUnitsPerBasket" xlink:label="loc_unl_NumberOfUnitsPerBasket" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_NumberOfUnitsPerBasket" xml:lang="en-US">Number Of Units Per Basket</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_NumberOfUnitsPerBasket" xml:lang="en-US">Number of units per basket</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_NumberOfUnitsPerBasket" xml:lang="en-US">Number of Units per Basket</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_NumberOfUnitsPerBasket" xlink:to="lab_unl_NumberOfUnitsPerBasket" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_FeePaidPerOrder" xlink:label="loc_unl_FeePaidPerOrder" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_FeePaidPerOrder" xml:lang="en-US">Fee Paid Per Order</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_FeePaidPerOrder" xml:lang="en-US">Fee paid by Authorized Purchasers for each order placed to create one or more Creation Baskets or to redeem one or more baskets</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_FeePaidPerOrder" xml:lang="en-US">Fee Paid Per Order</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_FeePaidPerOrder" xlink:to="lab_unl_FeePaidPerOrder" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_NumberOfUnitsRegisteredInPeriod" xlink:label="loc_unl_NumberOfUnitsRegisteredInPeriod" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_NumberOfUnitsRegisteredInPeriod" xml:lang="en-US">Number Of Units Registered In Period</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_NumberOfUnitsRegisteredInPeriod" xml:lang="en-US">Number of initially registered units on Form S-1 with the U.S. Securities and Exchange Commission</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_NumberOfUnitsRegisteredInPeriod" xml:lang="en-US">Number of Units Registered in Period</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_NumberOfUnitsRegisteredInPeriod" xlink:to="lab_unl_NumberOfUnitsRegisteredInPeriod" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_UnitsIssuedDuringPeriodUnitsNewIssues" xlink:label="loc_unl_UnitsIssuedDuringPeriodUnitsNewIssues" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_UnitsIssuedDuringPeriodUnitsNewIssues" xml:lang="en-US">Units Issued During Period Units New Issues</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_UnitsIssuedDuringPeriodUnitsNewIssues" xml:lang="en-US">Number of units issued</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_UnitsIssuedDuringPeriodUnitsNewIssues" xml:lang="en-US">Units Issued During Period, Units, New Issues</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_UnitsIssuedDuringPeriodUnitsNewIssues" xlink:to="lab_unl_UnitsIssuedDuringPeriodUnitsNewIssues" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_UnitsIssuedDuringPeriodValueNewIssues" xlink:label="loc_unl_UnitsIssuedDuringPeriodValueNewIssues" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_UnitsIssuedDuringPeriodValueNewIssues" xml:lang="en-US">Units Issued During Period Value New Issues</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_UnitsIssuedDuringPeriodValueNewIssues" xml:lang="en-US">Value of unit issued</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_UnitsIssuedDuringPeriodValueNewIssues" xml:lang="en-US">Units Issued During Period, Value, New Issues</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_UnitsIssuedDuringPeriodValueNewIssues" xlink:to="lab_unl_UnitsIssuedDuringPeriodValueNewIssues" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_NumberOfRegisteredUnits" xlink:label="loc_unl_NumberOfRegisteredUnits" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_NumberOfRegisteredUnits" xml:lang="en-US">Number Of Registered Units</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_NumberOfRegisteredUnits" xml:lang="en-US">Number of registered units</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_NumberOfRegisteredUnits" xml:lang="en-US">Number of Registered Units</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_NumberOfRegisteredUnits" xlink:to="lab_unl_NumberOfRegisteredUnits" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationAbstract" xlink:label="loc_unl_DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationAbstract" xml:lang="en-US">Disclosure Summary Of Significant Accounting Policies Additional Information [Abstract]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationAbstract" xml:lang="en-US">Disclosure - Summary of Significant Accounting Policies - Additional Information [Abstract]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationAbstract" xlink:to="lab_unl_DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationAbstract" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_SignificantAccountingPoliciesTable" xlink:label="loc_unl_SignificantAccountingPoliciesTable" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_SignificantAccountingPoliciesTable" xml:lang="en-US">Significant Accounting Policies [Table]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_SignificantAccountingPoliciesTable" xml:lang="en-US">Significant Accounting Policies [Table]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_SignificantAccountingPoliciesTable" xlink:to="lab_unl_SignificantAccountingPoliciesTable" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_RangeAxis" xml:lang="en-US">Range [Axis]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RangeAxis" xlink:to="lab_us-gaap_RangeAxis" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_RangeMember" xml:lang="en-US">Range [Domain]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RangeMember" xlink:to="lab_us-gaap_RangeMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_RedemptionBasketsMember" xlink:label="loc_unl_RedemptionBasketsMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_RedemptionBasketsMember" xml:lang="en-US">Redemption Baskets [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_RedemptionBasketsMember" xml:lang="en-US">Redemption Baskets [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_RedemptionBasketsMember" xml:lang="en-US">Redemption Baskets [Member]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_RedemptionBasketsMember" xlink:to="lab_unl_RedemptionBasketsMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_SignificantAccountingPoliciesLineItems" xlink:label="loc_unl_SignificantAccountingPoliciesLineItems" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_SignificantAccountingPoliciesLineItems" xml:lang="en-US">Significant Accounting Policies [Line Items]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_SignificantAccountingPoliciesLineItems" xml:lang="en-US">Significant Accounting Policies [Line Items]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_SignificantAccountingPoliciesLineItems" xml:lang="en-US">Significant Accounting Policies [Line Items]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_SignificantAccountingPoliciesLineItems" xlink:to="lab_unl_SignificantAccountingPoliciesLineItems" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_DisclosureFeesPaidByFundAndRelatedPartyTransactionsAdditionalInformationAbstract" xlink:label="loc_unl_DisclosureFeesPaidByFundAndRelatedPartyTransactionsAdditionalInformationAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_DisclosureFeesPaidByFundAndRelatedPartyTransactionsAdditionalInformationAbstract" xml:lang="en-US">Disclosure Fees Paid By Fund and Related Party Transactions Additional Information [Abstract]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_DisclosureFeesPaidByFundAndRelatedPartyTransactionsAdditionalInformationAbstract" xml:lang="en-US">Disclosure - Fees Paid by Fund and Related Party Transactions - Additional Information [Abstract]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_DisclosureFeesPaidByFundAndRelatedPartyTransactionsAdditionalInformationAbstract" xlink:to="lab_unl_DisclosureFeesPaidByFundAndRelatedPartyTransactionsAdditionalInformationAbstract" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xml:lang="en-US">Schedule Of Related Party Transactions By Related Party [Table]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="lab_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_FuturePeriodMember" xlink:label="loc_unl_FuturePeriodMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_FuturePeriodMember" xml:lang="en-US">Future Period [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_FuturePeriodMember" xml:lang="en-US">Future Period - for the year ending December 31, 2016 [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_FuturePeriodMember" xml:lang="en-US">Future Period [Member]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_FuturePeriodMember" xlink:to="lab_unl_FuturePeriodMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_UnitedStates12MonthNaturalGasFundMember" xlink:label="loc_unl_UnitedStates12MonthNaturalGasFundMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_UnitedStates12MonthNaturalGasFundMember" xml:lang="en-US">United States 12 Month Natural Gas Fund [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_unl_UnitedStates12MonthNaturalGasFundMember" xml:lang="en-US">UNL [Member]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_UnitedStates12MonthNaturalGasFundMember" xlink:to="lab_unl_UnitedStates12MonthNaturalGasFundMember" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_TypeOfArrangementAxis" xlink:label="loc_us-gaap_TypeOfArrangementAxis" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_TypeOfArrangementAxis" xml:lang="en-US">Type Of Arrangement [Axis]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TypeOfArrangementAxis" xlink:to="lab_us-gaap_TypeOfArrangementAxis" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ArrangementsAndNonarrangementTransactionsMember" xlink:label="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ArrangementsAndNonarrangementTransactionsMember" xml:lang="en-US">Arrangements and Non-Arrangement Transactions [Domain]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ArrangementsAndNonarrangementTransactionsMember" xlink:to="lab_us-gaap_ArrangementsAndNonarrangementTransactionsMember" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LicensingAgreementsMember" xlink:label="loc_us-gaap_LicensingAgreementsMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LicensingAgreementsMember" xml:lang="en-US">Licensing Agreements [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_LicensingAgreementsMember" xml:lang="en-US">Licensing Agreements [Member]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LicensingAgreementsMember" xlink:to="lab_us-gaap_LicensingAgreementsMember" />

    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_InvestmentIdentifierSchemeAxis" xlink:label="loc_invest_InvestmentIdentifierSchemeAxis" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_invest_InvestmentIdentifierSchemeAxis" xml:lang="en-US">Investment Identifier Scheme [Axis]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_invest_InvestmentIdentifierSchemeAxis" xlink:to="lab_invest_InvestmentIdentifierSchemeAxis" />

    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_InvestmentIdentifierSchemeDomain" xlink:label="loc_invest_InvestmentIdentifierSchemeDomain" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_invest_InvestmentIdentifierSchemeDomain" xml:lang="en-US">Investment Identifier Scheme [Domain]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_invest_InvestmentIdentifierSchemeDomain" xlink:to="lab_invest_InvestmentIdentifierSchemeDomain" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_MaximumMember" xml:lang="en-US">Maximum [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_MaximumMember" xml:lang="en-US">Maximum [Member]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MaximumMember" xlink:to="lab_us-gaap_MaximumMember" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xml:lang="en-US">Related Party [Axis]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="lab_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaap_RelatedPartyDomain" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_RelatedPartyDomain" xml:lang="en-US">Related Party [Domain]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RelatedPartyDomain" xlink:to="lab_us-gaap_RelatedPartyDomain" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_RelatedPublicFundsMember" xlink:label="loc_unl_RelatedPublicFundsMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_RelatedPublicFundsMember" xml:lang="en-US">Related Public Funds [Member]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_RelatedPublicFundsMember" xlink:to="lab_unl_RelatedPublicFundsMember" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="loc_us-gaap_SubsequentEventTypeAxis" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_SubsequentEventTypeAxis" 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="loc_us-gaap_SubsequentEventTypeAxis" xlink:to="lab_us-gaap_SubsequentEventTypeAxis" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ManagementFeeDescription" xlink:label="loc_us-gaap_ManagementFeeDescription" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ManagementFeeDescription" xml:lang="en-US">Management Fee Description</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ManagementFeeDescription" xml:lang="en-US">USCF Management Fee</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ManagementFeeDescription" xlink:to="lab_us-gaap_ManagementFeeDescription" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NoninterestExpenseDirectorsFees" xlink:label="loc_us-gaap_NoninterestExpenseDirectorsFees" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_NoninterestExpenseDirectorsFees" xml:lang="en-US">Noninterest Expense Directors Fees</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_NoninterestExpenseDirectorsFees" xml:lang="en-US">Estimated directors fees and expenses</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_NoninterestExpenseDirectorsFees" xml:lang="en-US">Directors&#39; fees and insurance</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NoninterestExpenseDirectorsFees" xlink:to="lab_us-gaap_NoninterestExpenseDirectorsFees" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_BaseFeePercentage" xlink:label="loc_unl_BaseFeePercentage" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_BaseFeePercentage" xml:lang="en-US">Base Fee Percentage</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_BaseFeePercentage" xml:lang="en-US">Fee percentage</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_BaseFeePercentage" xml:lang="en-US">Base Fee Percentage</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_BaseFeePercentage" xlink:to="lab_unl_BaseFeePercentage" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_BaseAmountForFeePercentage" xlink:label="loc_unl_BaseAmountForFeePercentage" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_BaseAmountForFeePercentage" xml:lang="en-US">Base Amount For Fee Percentage</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_BaseAmountForFeePercentage" xml:lang="en-US">Assets basis for determining fee percentage</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_BaseAmountForFeePercentage" xml:lang="en-US">Base Amount For Fee Percentage</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_BaseAmountForFeePercentage" xlink:to="lab_unl_BaseAmountForFeePercentage" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LicenseCosts" xlink:label="loc_us-gaap_LicenseCosts" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LicenseCosts" xml:lang="en-US">License Costs</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_LicenseCosts" xml:lang="en-US">Licensing fee incurred</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_LicenseCosts" xml:lang="en-US">License fees</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LicenseCosts" xlink:to="lab_us-gaap_LicenseCosts" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherGeneralExpense" xlink:label="loc_us-gaap_OtherGeneralExpense" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_OtherGeneralExpense" xml:lang="en-US">Other General Expense</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_OtherGeneralExpense" xml:lang="en-US">Estimated investor tax reporting cost</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherGeneralExpense" xlink:to="lab_us-gaap_OtherGeneralExpense" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_PercentageOfChangeInCostsAndExpenses" xlink:label="loc_unl_PercentageOfChangeInCostsAndExpenses" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_PercentageOfChangeInCostsAndExpenses" xml:lang="en-US">Percentage Of Change In Costs and Expenses</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_PercentageOfChangeInCostsAndExpenses" xml:lang="en-US">Costs and expenses annual limit for reimbursement</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_PercentageOfChangeInCostsAndExpenses" xml:lang="en-US">Percentage of Change in Costs and Expenses</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_PercentageOfChangeInCostsAndExpenses" xlink:to="lab_unl_PercentageOfChangeInCostsAndExpenses" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_ExpenseWaiver" xlink:label="loc_unl_ExpenseWaiver" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_ExpenseWaiver" xml:lang="en-US">Expense Waiver</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_ExpenseWaiver" xml:lang="en-US">Expense waiver (Note 3)</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_unl_ExpenseWaiver" xml:lang="en-US">Expense waiver (Note 3)</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_ExpenseWaiver" xml:lang="en-US">Expense Waiver</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_ExpenseWaiver" xlink:to="lab_unl_ExpenseWaiver" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ClassOfStockDomain" 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="loc_us-gaap_ClassOfStockDomain" xlink:to="lab_us-gaap_ClassOfStockDomain" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_RebalancingInvestmentsTransactionMember" xlink:label="loc_unl_RebalancingInvestmentsTransactionMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_RebalancingInvestmentsTransactionMember" xml:lang="en-US">Rebalancing Investments Transaction [Member]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_RebalancingInvestmentsTransactionMember" xlink:to="lab_unl_RebalancingInvestmentsTransactionMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_CreationAndRedemptionActivityMember" xlink:label="loc_unl_CreationAndRedemptionActivityMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_CreationAndRedemptionActivityMember" xml:lang="en-US">Creation And Redemption Activity [Member]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_CreationAndRedemptionActivityMember" xlink:to="lab_unl_CreationAndRedemptionActivityMember" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FloorBrokerageExchangeAndClearanceFees" xlink:label="loc_us-gaap_FloorBrokerageExchangeAndClearanceFees" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FloorBrokerageExchangeAndClearanceFees" xml:lang="en-US">Floor Brokerage Exchange and Clearance Fees</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_FloorBrokerageExchangeAndClearanceFees" xml:lang="en-US">Brokerage commissions</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FloorBrokerageExchangeAndClearanceFees" xlink:to="lab_us-gaap_FloorBrokerageExchangeAndClearanceFees" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_PercentageOfAverageDailyNetAssets" xlink:label="loc_unl_PercentageOfAverageDailyNetAssets" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_PercentageOfAverageDailyNetAssets" xml:lang="en-US">Percentage Of Average Daily Net Assets</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_PercentageOfAverageDailyNetAssets" xml:lang="en-US">Percentage of average daily net assets</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_PercentageOfAverageDailyNetAssets" xml:lang="en-US">Percentage of Average Daily Net Assets</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_PercentageOfAverageDailyNetAssets" xlink:to="lab_unl_PercentageOfAverageDailyNetAssets" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_DisclosureContractsAndAgreementsAdditionalInformationAbstract" xlink:label="loc_unl_DisclosureContractsAndAgreementsAdditionalInformationAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_DisclosureContractsAndAgreementsAdditionalInformationAbstract" xml:lang="en-US">Disclosure Contracts and Agreements Additional Information [Abstract]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_DisclosureContractsAndAgreementsAdditionalInformationAbstract" xml:lang="en-US">Disclosure - Contracts and Agreements - Additional information [Abstract]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_DisclosureContractsAndAgreementsAdditionalInformationAbstract" xlink:to="lab_unl_DisclosureContractsAndAgreementsAdditionalInformationAbstract" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeTable" xlink:label="loc_us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeTable" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeTable" xml:lang="en-US">Long Duration Contracts Assumptions By Product and Guarantee [Table]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeTable" xlink:to="lab_us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeTable" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_MarketingAgreementMember" xlink:label="loc_unl_MarketingAgreementMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_MarketingAgreementMember" xml:lang="en-US">Marketing Agreement [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_MarketingAgreementMember" xml:lang="en-US">Marketing Agreement [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_MarketingAgreementMember" xml:lang="en-US">Marketing Agreement [Member]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_MarketingAgreementMember" xlink:to="lab_unl_MarketingAgreementMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_GroupFourMember" xlink:label="loc_unl_GroupFourMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_GroupFourMember" xml:lang="en-US">Group Four [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_GroupFourMember" xml:lang="en-US">UNL&#39;s assets up to $3 billion [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_GroupFourMember" xml:lang="en-US">Group Four [Member]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_GroupFourMember" xlink:to="lab_unl_GroupFourMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_GroupFiveMember" xlink:label="loc_unl_GroupFiveMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_GroupFiveMember" xml:lang="en-US">Group Five [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_GroupFiveMember" xml:lang="en-US">UNL&#39;s assets in excess of $3 billion [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_GroupFiveMember" xml:lang="en-US">Group Five [Member]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_GroupFiveMember" xlink:to="lab_unl_GroupFiveMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_GroupSixMember" xlink:label="loc_unl_GroupSixMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_GroupSixMember" xml:lang="en-US">Group Six [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_GroupSixMember" xml:lang="en-US">first $500 million of the Related Public Funds&#39; combined net assets [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_GroupSixMember" xml:lang="en-US">Group Six [Member]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_GroupSixMember" xlink:to="lab_unl_GroupSixMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_GroupSevenMember" xlink:label="loc_unl_GroupSevenMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_GroupSevenMember" xml:lang="en-US">Group Seven [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_GroupSevenMember" xml:lang="en-US">Related Public Funds&#39; combined net assets greater than $500 million but less than $1 billion [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_GroupSevenMember" xml:lang="en-US">Group Seven [Member]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_GroupSevenMember" xlink:to="lab_unl_GroupSevenMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_GroupEightMember" xlink:label="loc_unl_GroupEightMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_GroupEightMember" xml:lang="en-US">Group Eight [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_GroupEightMember" xml:lang="en-US">Related Public Funds&#39; combined net assets exceed $1 billion [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_GroupEightMember" xml:lang="en-US">Group Eight [Member]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_GroupEightMember" xlink:to="lab_unl_GroupEightMember" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_MinimumMember" xml:lang="en-US">Minimum [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_MinimumMember" xml:lang="en-US">Minimum [Member]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MinimumMember" xlink:to="lab_us-gaap_MinimumMember" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeLineItems" xlink:label="loc_us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeLineItems" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeLineItems" xml:lang="en-US">Long Duration Contracts Assumptions By Product and Guarantee [Line Items]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeLineItems" xml:lang="en-US">Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeLineItems" xlink:to="lab_us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeLineItems" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_BasisAmountForFeePercentage" xlink:label="loc_unl_BasisAmountForFeePercentage" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_BasisAmountForFeePercentage" xml:lang="en-US">Basis Amount For Fee Percentage</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_BasisAmountForFeePercentage" xml:lang="en-US">Base amount for determining fee percentage</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_BasisAmountForFeePercentage" xml:lang="en-US">Basis Amount for Fee Percentage</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_BasisAmountForFeePercentage" xlink:to="lab_unl_BasisAmountForFeePercentage" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CustodyFees" xlink:label="loc_us-gaap_CustodyFees" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CustodyFees" xml:lang="en-US">Custody Fees</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_CustodyFees" xml:lang="en-US">Annual Fee for custody, fund accounting and fund administration services</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CustodyFees" xlink:to="lab_us-gaap_CustodyFees" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NoninterestExpenseTransferAgentAndCustodianFees" xlink:label="loc_us-gaap_NoninterestExpenseTransferAgentAndCustodianFees" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_NoninterestExpenseTransferAgentAndCustodianFees" xml:lang="en-US">Noninterest Expense Transfer Agent and Custodian Fees</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_NoninterestExpenseTransferAgentAndCustodianFees" xml:lang="en-US">Annual Fee for transfer agency services</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NoninterestExpenseTransferAgentAndCustodianFees" xlink:to="lab_us-gaap_NoninterestExpenseTransferAgentAndCustodianFees" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_TransactionFeesPaid" xlink:label="loc_unl_TransactionFeesPaid" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_TransactionFeesPaid" xml:lang="en-US">Transaction Fees Paid</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_TransactionFeesPaid" xml:lang="en-US">Transaction fees per transaction</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_TransactionFeesPaid" xml:lang="en-US">Transaction Fees Paid</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_TransactionFeesPaid" xlink:to="lab_unl_TransactionFeesPaid" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_CommissionsPaid" xlink:label="loc_unl_CommissionsPaid" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_CommissionsPaid" xml:lang="en-US">Commissions Paid</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_CommissionsPaid" xml:lang="en-US">Commissions per round-turn trade, including applicable exchange and NFA fees for Natural Gas-Related Futures Contracts and options on Futures Contracts</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_CommissionsPaid" xml:lang="en-US">Commissions Paid</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_CommissionsPaid" xlink:to="lab_unl_CommissionsPaid" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_DisclosureFinancialInstrumentsOffBalanceSheetRisksAndContingenciesAdditionalInformationAbstract" xlink:label="loc_unl_DisclosureFinancialInstrumentsOffBalanceSheetRisksAndContingenciesAdditionalInformationAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_DisclosureFinancialInstrumentsOffBalanceSheetRisksAndContingenciesAdditionalInformationAbstract" xml:lang="en-US">Disclosure Financial Instruments Off Balance Sheet Risks and Contingencies Additional Information [Abstract]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_DisclosureFinancialInstrumentsOffBalanceSheetRisksAndContingenciesAdditionalInformationAbstract" xml:lang="en-US">Disclosure - Financial Instruments, Off-Balance Sheet Risks and Contingencies - Additional Information [Abstract]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_DisclosureFinancialInstrumentsOffBalanceSheetRisksAndContingenciesAdditionalInformationAbstract" xlink:to="lab_unl_DisclosureFinancialInstrumentsOffBalanceSheetRisksAndContingenciesAdditionalInformationAbstract" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_CarryingAmountsAndFairValuesOfFinancialInstrumentsOrLiabilitiesTable" xlink:label="loc_unl_CarryingAmountsAndFairValuesOfFinancialInstrumentsOrLiabilitiesTable" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_CarryingAmountsAndFairValuesOfFinancialInstrumentsOrLiabilitiesTable" xml:lang="en-US">Carrying Amounts and Fair Values Of Financial Instruments Or Liabilities [Table]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_CarryingAmountsAndFairValuesOfFinancialInstrumentsOrLiabilitiesTable" xml:lang="en-US">Carrying Amounts and Fair Values of Financial Instruments or Liabilities [Table]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_CarryingAmountsAndFairValuesOfFinancialInstrumentsOrLiabilitiesTable" xlink:to="lab_unl_CarryingAmountsAndFairValuesOfFinancialInstrumentsOrLiabilitiesTable" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_CarryingAmountsAndFairValuesOfFinancialInstrumentsOrLiabilitiesLineItems" xlink:label="loc_unl_CarryingAmountsAndFairValuesOfFinancialInstrumentsOrLiabilitiesLineItems" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_CarryingAmountsAndFairValuesOfFinancialInstrumentsOrLiabilitiesLineItems" xml:lang="en-US">Carrying Amounts and Fair Values Of Financial Instruments Or Liabilities [Line Items]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_CarryingAmountsAndFairValuesOfFinancialInstrumentsOrLiabilitiesLineItems" xml:lang="en-US">Carrying Amounts and Fair Values of Financial Instruments or Liabilities [Line Items]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_CarryingAmountsAndFairValuesOfFinancialInstrumentsOrLiabilitiesLineItems" xml:lang="en-US">Carrying Amounts and Fair Values of Financial Instruments or Liabilities [Line Items]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_CarryingAmountsAndFairValuesOfFinancialInstrumentsOrLiabilitiesLineItems" xlink:to="lab_unl_CarryingAmountsAndFairValuesOfFinancialInstrumentsOrLiabilitiesLineItems" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DepositsMoneyMarketDeposits" xlink:label="loc_us-gaap_DepositsMoneyMarketDeposits" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DepositsMoneyMarketDeposits" xml:lang="en-US">Deposits Money Market Deposits</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_DepositsMoneyMarketDeposits" xml:lang="en-US">Cash investments in money market funds</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DepositsMoneyMarketDeposits" xlink:to="lab_us-gaap_DepositsMoneyMarketDeposits" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Deposits" xlink:label="loc_us-gaap_Deposits" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_Deposits" xml:lang="en-US">Deposits</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_Deposits" xml:lang="en-US">Deposits in domestic and foreign financial institutions</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Deposits" xlink:to="lab_us-gaap_Deposits" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_DisclosurePerUnitPerformanceDataAndOtherSupplementalFinancialDataAbstract" xlink:label="loc_unl_DisclosurePerUnitPerformanceDataAndOtherSupplementalFinancialDataAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_DisclosurePerUnitPerformanceDataAndOtherSupplementalFinancialDataAbstract" xml:lang="en-US">Disclosure Per Unit Performance Data and Other Supplemental Financial Data [Abstract]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_DisclosurePerUnitPerformanceDataAndOtherSupplementalFinancialDataAbstract" xml:lang="en-US">Disclosure - Per Unit Performance Data and Other Supplemental Financial Data [Abstract]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_DisclosurePerUnitPerformanceDataAndOtherSupplementalFinancialDataAbstract" xlink:to="lab_unl_DisclosurePerUnitPerformanceDataAndOtherSupplementalFinancialDataAbstract" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionTable" xlink:label="loc_us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionTable" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionTable" xml:lang="en-US">Average Sales Price and Production Costs Per Unit Of Production [Table]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionTable" xlink:to="lab_us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionTable" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionLineItems" xlink:label="loc_us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionLineItems" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionLineItems" xml:lang="en-US">Average Sales Price and Production Costs Per Unit Of Production [Line Items]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionLineItems" xml:lang="en-US">Average Sales Price and Production Costs Per Unit of Production [Line Items]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionLineItems" xlink:to="lab_us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionLineItems" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInPartnersCapitalRollForward" xlink:label="loc_us-gaap_IncreaseDecreaseInPartnersCapitalRollForward" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_IncreaseDecreaseInPartnersCapitalRollForward" xml:lang="en-US">Increase Decrease In Partners Capital [Roll Forward]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_IncreaseDecreaseInPartnersCapitalRollForward" xml:lang="en-US">Per Share Operating Performance:</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInPartnersCapitalRollForward" xlink:to="lab_us-gaap_IncreaseDecreaseInPartnersCapitalRollForward" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_TotalIncomeLossPerUnit" xlink:label="loc_unl_TotalIncomeLossPerUnit" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_TotalIncomeLossPerUnit" xml:lang="en-US">Total Income Loss Per Unit</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_unl_TotalIncomeLossPerUnit" xml:lang="en-US">Total income (loss)</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_TotalIncomeLossPerUnit" xml:lang="en-US">Total Income (Loss), Per Unit</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_TotalIncomeLossPerUnit" xlink:to="lab_unl_TotalIncomeLossPerUnit" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_TotalExpensesPerUnit" xlink:label="loc_unl_TotalExpensesPerUnit" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_TotalExpensesPerUnit" xml:lang="en-US">Total Expenses Per Unit</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_TotalExpensesPerUnit" xml:lang="en-US">Net expenses</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_TotalExpensesPerUnit" xml:lang="en-US">Total Expenses, Per Unit</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_TotalExpensesPerUnit" xlink:to="lab_unl_TotalExpensesPerUnit" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_IncreaseDecreaseInNetAssetValuePerUnit" xlink:label="loc_unl_IncreaseDecreaseInNetAssetValuePerUnit" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_IncreaseDecreaseInNetAssetValuePerUnit" xml:lang="en-US">Increase Decrease In Net Asset Value Per Unit</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_unl_IncreaseDecreaseInNetAssetValuePerUnit" xml:lang="en-US">Net increase (decrease) in net asset value</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_IncreaseDecreaseInNetAssetValuePerUnit" xml:lang="en-US">Increase (Decrease) In Net Asset Value Per Unit</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_IncreaseDecreaseInNetAssetValuePerUnit" xlink:to="lab_unl_IncreaseDecreaseInNetAssetValuePerUnit" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_RateOfReturnOnAverageAsset" xlink:label="loc_unl_RateOfReturnOnAverageAsset" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_RateOfReturnOnAverageAsset" xml:lang="en-US">Rate Of Return On Average Asset</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_RateOfReturnOnAverageAsset" xml:lang="en-US">Total Return</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_RateOfReturnOnAverageAsset" xml:lang="en-US">Rate Of Return On Average Asset</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_RateOfReturnOnAverageAsset" xlink:to="lab_unl_RateOfReturnOnAverageAsset" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_AverageNetAssetsAbstract" xlink:label="loc_unl_AverageNetAssetsAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_AverageNetAssetsAbstract" xml:lang="en-US">Average Net Assets [Abstract]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_AverageNetAssetsAbstract" xml:lang="en-US">Ratios to Average Net Assets</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_AverageNetAssetsAbstract" xml:lang="en-US">Average Net Assets [Abstract]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_AverageNetAssetsAbstract" xlink:to="lab_unl_AverageNetAssetsAbstract" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_PercentageOfTotalRevenue" xlink:label="loc_unl_PercentageOfTotalRevenue" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_PercentageOfTotalRevenue" xml:lang="en-US">Percentage Of Total Revenue</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_PercentageOfTotalRevenue" xml:lang="en-US">Total income (loss)</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_PercentageOfTotalRevenue" xml:lang="en-US">Percentage of Total Revenue</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_PercentageOfTotalRevenue" xlink:to="lab_unl_PercentageOfTotalRevenue" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_ManagementIncentiveFeePercentage" xlink:label="loc_unl_ManagementIncentiveFeePercentage" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_ManagementIncentiveFeePercentage" xml:lang="en-US">Management Incentive Fee Percentage</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_ManagementIncentiveFeePercentage" xml:lang="en-US">Management fees</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_ManagementIncentiveFeePercentage" xml:lang="en-US">Management Incentive Fee Percentage</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_ManagementIncentiveFeePercentage" xlink:to="lab_unl_ManagementIncentiveFeePercentage" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_ExpensesExcludingManagementFeePercentage" xlink:label="loc_unl_ExpensesExcludingManagementFeePercentage" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_ExpensesExcludingManagementFeePercentage" xml:lang="en-US">Expenses Excluding Management Fee Percentage</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_ExpensesExcludingManagementFeePercentage" xml:lang="en-US">Total expenses excluding management fees</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_ExpensesExcludingManagementFeePercentage" xml:lang="en-US">Expenses, Excluding Management Fee Percentage</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_ExpensesExcludingManagementFeePercentage" xlink:to="lab_unl_ExpensesExcludingManagementFeePercentage" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_PercentageWaiverExpense" xlink:label="loc_unl_PercentageWaiverExpense" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_PercentageWaiverExpense" xml:lang="en-US">Percentage Waiver Expense</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_unl_PercentageWaiverExpense" xml:lang="en-US">Expenses waived</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_PercentageWaiverExpense" xml:lang="en-US">Percentage Waiver Expense</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_PercentageWaiverExpense" xlink:to="lab_unl_PercentageWaiverExpense" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_ExpenseExcludingManagementFeePercentageNet" xlink:label="loc_unl_ExpenseExcludingManagementFeePercentageNet" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_ExpenseExcludingManagementFeePercentageNet" xml:lang="en-US">Expense Excluding Management Fee Percentage Net</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_ExpenseExcludingManagementFeePercentageNet" xml:lang="en-US">Net expenses excluding management fees</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_ExpenseExcludingManagementFeePercentageNet" xml:lang="en-US">Expense Excluding Management Fee Percentage Net</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_ExpenseExcludingManagementFeePercentageNet" xlink:to="lab_unl_ExpenseExcludingManagementFeePercentageNet" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_PercentageOfConsolidatedNetIncome" xlink:label="loc_unl_PercentageOfConsolidatedNetIncome" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_PercentageOfConsolidatedNetIncome" xml:lang="en-US">Percentage Of Consolidated Net Income</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_PercentageOfConsolidatedNetIncome" xml:lang="en-US">Net income (loss)</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_PercentageOfConsolidatedNetIncome" xml:lang="en-US">Percentage of Consolidated Net Income</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_PercentageOfConsolidatedNetIncome" xlink:to="lab_unl_PercentageOfConsolidatedNetIncome" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_DisclosureValuationOfSecuritiesUsingFairValueHierarchyAbstract" xlink:label="loc_unl_DisclosureValuationOfSecuritiesUsingFairValueHierarchyAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_DisclosureValuationOfSecuritiesUsingFairValueHierarchyAbstract" xml:lang="en-US">Disclosure Valuation Of Securities Using Fair Value Hierarchy [Abstract]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_DisclosureValuationOfSecuritiesUsingFairValueHierarchyAbstract" xml:lang="en-US">Disclosure - Valuation of Securities Using Fair Value Hierarchy [Abstract]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_DisclosureValuationOfSecuritiesUsingFairValueHierarchyAbstract" xlink:to="lab_unl_DisclosureValuationOfSecuritiesUsingFairValueHierarchyAbstract" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable" xlink:label="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable" xml:lang="en-US">Schedule Of Trading Securities and Other Trading Assets [Table]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable" xlink:to="lab_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis" xml:lang="en-US">Fair Value By Fair Value Hierarchy Level [Axis]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:to="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xml:lang="en-US">Fair Value Measurements Fair Value Hierarchy [Domain]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:to="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FairValueInputsLevel1Member" xml:lang="en-US">Fair Value Inputs Level 1 [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_FairValueInputsLevel1Member" 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="loc_us-gaap_FairValueInputsLevel1Member" xlink:to="lab_us-gaap_FairValueInputsLevel1Member" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FairValueInputsLevel2Member" 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="loc_us-gaap_FairValueInputsLevel2Member" xlink:to="lab_us-gaap_FairValueInputsLevel2Member" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FairValueInputsLevel3Member" xml:lang="en-US">Fair Value, Inputs, Level 3 [Member]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueInputsLevel3Member" xlink:to="lab_us-gaap_FairValueInputsLevel3Member" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FinancialInstrumentAxis" xlink:label="loc_us-gaap_FinancialInstrumentAxis" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FinancialInstrumentAxis" xml:lang="en-US">Financial Instrument [Axis]</label>

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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" />

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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ShortTermInvestmentsMember" xml:lang="en-US">Short Term Investments [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ShortTermInvestmentsMember" xml:lang="en-US">Short-Term Investments [Member]</label>

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    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/country/2016/country-2016-01-31.xsd#country_US" xlink:label="loc_country_US" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_country_US" xml:lang="en-US">United States [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_country_US" xml:lang="en-US">United States [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_country_US" xml:lang="en-US">United State [Member]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_country_US" xlink:to="lab_country_US" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems" xlink:label="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems" xml:lang="en-US">Schedule Of Trading Securities and Other Trading Assets [Line Items]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems" xml:lang="en-US">Schedule of Trading Securities and Other Trading Assets [Line Items]</label>

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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InvestmentsFairValueDisclosure" xlink:label="loc_us-gaap_InvestmentsFairValueDisclosure" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_InvestmentsFairValueDisclosure" xml:lang="en-US">Investments Fair Value Disclosure</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_InvestmentsFairValueDisclosure" xml:lang="en-US">Securities, fair value</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentsFairValueDisclosure" xlink:to="lab_us-gaap_InvestmentsFairValueDisclosure" />

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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_DisclosureFairValueOfDerivativeInstrumentsAbstract" xml:lang="en-US">Disclosure Fair Value Of Derivative Instruments [Abstract]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_DisclosureFairValueOfDerivativeInstrumentsAbstract" xml:lang="en-US">Disclosure - Fair Value of Derivative Instruments [Abstract]</label>

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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable" xlink:label="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable" xml:lang="en-US">Fair Values Derivatives Balance Sheet Location By Derivative Contract Type By Hedging Designation [Table]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable" xlink:to="lab_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DerivativeInstrumentRiskAxis" xml:lang="en-US">Derivative Instrument Risk [Axis]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis" xlink:to="lab_us-gaap_DerivativeInstrumentRiskAxis" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="loc_us-gaap_DerivativeContractTypeDomain" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DerivativeContractTypeDomain" xml:lang="en-US">Derivative Contract Type [Domain]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeContractTypeDomain" xlink:to="lab_us-gaap_DerivativeContractTypeDomain" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommodityContractMember" xlink:label="loc_us-gaap_CommodityContractMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CommodityContractMember" xml:lang="en-US">Commodity Contract [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_CommodityContractMember" xml:lang="en-US">Commodity Contracts [Member]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommodityContractMember" xlink:to="lab_us-gaap_CommodityContractMember" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BalanceSheetLocationAxis" xlink:label="loc_us-gaap_BalanceSheetLocationAxis" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_BalanceSheetLocationAxis" xml:lang="en-US">Balance Sheet Location [Axis]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BalanceSheetLocationAxis" xlink:to="lab_us-gaap_BalanceSheetLocationAxis" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="loc_us-gaap_BalanceSheetLocationDomain" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_BalanceSheetLocationDomain" xml:lang="en-US">Balance Sheet Location [Domain]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BalanceSheetLocationDomain" xlink:to="lab_us-gaap_BalanceSheetLocationDomain" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AssetsTotalMember" xlink:label="loc_us-gaap_AssetsTotalMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AssetsTotalMember" xml:lang="en-US">Assets Total [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_AssetsTotalMember" xml:lang="en-US">Assets [Member]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsTotalMember" xlink:to="lab_us-gaap_AssetsTotalMember" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue" xlink:label="loc_us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue" xml:lang="en-US">Derivative Instruments Not Designated As Hedging Instruments Asset At Fair Value</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue" xml:lang="en-US">Derivatives not Accounted for as Hedging Instruments</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue" xlink:to="lab_us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_StatementCondensedScheduleOfInvestmentsAbstract" xlink:label="loc_unl_StatementCondensedScheduleOfInvestmentsAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_StatementCondensedScheduleOfInvestmentsAbstract" xml:lang="en-US">Statement Condensed Schedule Of Investments [Abstract]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_StatementCondensedScheduleOfInvestmentsAbstract" xlink:to="lab_unl_StatementCondensedScheduleOfInvestmentsAbstract" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_OpenFuturesContractsLongMember" xlink:label="loc_unl_OpenFuturesContractsLongMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_OpenFuturesContractsLongMember" xml:lang="en-US">Open Futures Contracts Long [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_OpenFuturesContractsLongMember" xml:lang="en-US">Open Futures Contracts, Long [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_OpenFuturesContractsLongMember" xml:lang="en-US">Open Futures Contracts, Long [Member]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_OpenFuturesContractsLongMember" xlink:to="lab_unl_OpenFuturesContractsLongMember" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashEquivalentsMember" xlink:label="loc_us-gaap_CashEquivalentsMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CashEquivalentsMember" xml:lang="en-US">Cash Equivalents [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_CashEquivalentsMember" xml:lang="en-US">Cash Equivalents [Member]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashEquivalentsMember" xlink:to="lab_us-gaap_CashEquivalentsMember" />

    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_InvestmentSecuritiesSeriesAxis" xlink:label="loc_invest_InvestmentSecuritiesSeriesAxis" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_invest_InvestmentSecuritiesSeriesAxis" xml:lang="en-US">Investment Securities Series [Axis]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_invest_InvestmentSecuritiesSeriesAxis" xlink:to="lab_invest_InvestmentSecuritiesSeriesAxis" />

    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_InvestmentSecuritiesSeriesDomain" xlink:label="loc_invest_InvestmentSecuritiesSeriesDomain" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_invest_InvestmentSecuritiesSeriesDomain" xml:lang="en-US">Investment Securities Series [Domain]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_invest_InvestmentSecuritiesSeriesDomain" xlink:to="lab_invest_InvestmentSecuritiesSeriesDomain" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_NymexNaturalGasFuturesNgFourMember" xlink:label="loc_unl_NymexNaturalGasFuturesNgFourMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_NymexNaturalGasFuturesNgFourMember" xml:lang="en-US">Nymex Natural Gas Futures Ng Four [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_NymexNaturalGasFuturesNgFourMember" xml:lang="en-US">NYMEX Natural Gas Futures NG August 2016 contracts, expiring July 2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_NymexNaturalGasFuturesNgFourMember" xlink:to="lab_unl_NymexNaturalGasFuturesNgFourMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_NymexNaturalGasFuturesNgFiveMember" xlink:label="loc_unl_NymexNaturalGasFuturesNgFiveMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_NymexNaturalGasFuturesNgFiveMember" xml:lang="en-US">Nymex Natural Gas Futures Ng Five [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_NymexNaturalGasFuturesNgFiveMember" xml:lang="en-US">NYMEX Natural Gas Futures NG September 2016 contracts, expiring August 2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_NymexNaturalGasFuturesNgFiveMember" xlink:to="lab_unl_NymexNaturalGasFuturesNgFiveMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_NymexNaturalGasFuturesNgSixMember" xlink:label="loc_unl_NymexNaturalGasFuturesNgSixMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_NymexNaturalGasFuturesNgSixMember" xml:lang="en-US">Nymex Natural Gas Futures Ng Six [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_NymexNaturalGasFuturesNgSixMember" xml:lang="en-US">NYMEX Natural Gas Futures NG October 2016 contracts, expiring September 2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_NymexNaturalGasFuturesNgSixMember" xlink:to="lab_unl_NymexNaturalGasFuturesNgSixMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_NymexNaturalGasFuturesNgSevenMember" xlink:label="loc_unl_NymexNaturalGasFuturesNgSevenMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_NymexNaturalGasFuturesNgSevenMember" xml:lang="en-US">Nymex Natural Gas Futures Ng Seven [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_NymexNaturalGasFuturesNgSevenMember" xml:lang="en-US">NYMEX Natural Gas Futures NG November 2016 contracts, expiring October 2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_NymexNaturalGasFuturesNgSevenMember" xlink:to="lab_unl_NymexNaturalGasFuturesNgSevenMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_NymexNaturalGasFuturesNgEightMember" xlink:label="loc_unl_NymexNaturalGasFuturesNgEightMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_NymexNaturalGasFuturesNgEightMember" xml:lang="en-US">Nymex Natural Gas Futures Ng Eight [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_NymexNaturalGasFuturesNgEightMember" xml:lang="en-US">NYMEX Natural Gas Futures NG December 2016 contracts, expiring November 2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_NymexNaturalGasFuturesNgEightMember" xlink:to="lab_unl_NymexNaturalGasFuturesNgEightMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_NymexNaturalGasFuturesNgNineMember" xlink:label="loc_unl_NymexNaturalGasFuturesNgNineMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_NymexNaturalGasFuturesNgNineMember" xml:lang="en-US">Nymex Natural Gas Futures Ng Nine [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_NymexNaturalGasFuturesNgNineMember" xml:lang="en-US">NYMEX Natural Gas Futures NG January 2017 contracts, expiring December 2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_NymexNaturalGasFuturesNgNineMember" xlink:to="lab_unl_NymexNaturalGasFuturesNgNineMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_NymexNaturalGasFuturesNgTenMember" xlink:label="loc_unl_NymexNaturalGasFuturesNgTenMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_NymexNaturalGasFuturesNgTenMember" xml:lang="en-US">Nymex Natural Gas Futures Ng Ten [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_NymexNaturalGasFuturesNgTenMember" xml:lang="en-US">NYMEX Natural Gas Futures NG February 2017 contracts, expiring January 2017</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_NymexNaturalGasFuturesNgTenMember" xlink:to="lab_unl_NymexNaturalGasFuturesNgTenMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_NymexNaturalGasFuturesNgElevenMember" xlink:label="loc_unl_NymexNaturalGasFuturesNgElevenMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_NymexNaturalGasFuturesNgElevenMember" xml:lang="en-US">Nymex Natural Gas Futures Ng Eleven [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_NymexNaturalGasFuturesNgElevenMember" xml:lang="en-US">NYMEX Natural Gas Futures NG March 2017 contracts, expiring February 2017</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_NymexNaturalGasFuturesNgElevenMember" xlink:to="lab_unl_NymexNaturalGasFuturesNgElevenMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_NymexNaturalGasFuturesNgTwelveMember" xlink:label="loc_unl_NymexNaturalGasFuturesNgTwelveMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_NymexNaturalGasFuturesNgTwelveMember" xml:lang="en-US">Nymex Natural Gas Futures Ng Twelve [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_NymexNaturalGasFuturesNgTwelveMember" xml:lang="en-US">NYMEX Natural Gas Futures NG April 2017 contracts, expiring March 2017</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_NymexNaturalGasFuturesNgTwelveMember" xlink:to="lab_unl_NymexNaturalGasFuturesNgTwelveMember" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_USTreasurySecuritiesMember" xlink:label="loc_us-gaap_USTreasurySecuritiesMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_USTreasurySecuritiesMember" xml:lang="en-US">Us Treasury Securities [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_USTreasurySecuritiesMember" 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="loc_us-gaap_USTreasurySecuritiesMember" xlink:to="lab_us-gaap_USTreasurySecuritiesMember" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MoneyMarketFundsMember" xlink:label="loc_us-gaap_MoneyMarketFundsMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_MoneyMarketFundsMember" xml:lang="en-US">Money Market Funds [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_MoneyMarketFundsMember" xml:lang="en-US">Money Market Funds [Member]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MoneyMarketFundsMember" xlink:to="lab_us-gaap_MoneyMarketFundsMember" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InvestmentOwnedBalanceContracts" xlink:label="loc_us-gaap_InvestmentOwnedBalanceContracts" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_InvestmentOwnedBalanceContracts" xml:lang="en-US">Investment Owned, Balance, Contracts</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_InvestmentOwnedBalanceContracts" xml:lang="en-US">Number of Contracts</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentOwnedBalanceContracts" xlink:to="lab_us-gaap_InvestmentOwnedBalanceContracts" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_UnrealizedGainLossOnOpenCommodityFuturesAndClearedSwapContracts" xlink:label="loc_unl_UnrealizedGainLossOnOpenCommodityFuturesAndClearedSwapContracts" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_UnrealizedGainLossOnOpenCommodityFuturesAndClearedSwapContracts" xml:lang="en-US">Unrealized Gain Loss On Open Commodity Futures and Cleared Swap Contracts</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_unl_UnrealizedGainLossOnOpenCommodityFuturesAndClearedSwapContracts" xml:lang="en-US">Unrealized Gain (Loss) on Open Commodity Contracts</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_UnrealizedGainLossOnOpenCommodityFuturesAndClearedSwapContracts" xml:lang="en-US">Unrealized gain (loss) on open commodity futures and cleared swap contracts.</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_UnrealizedGainLossOnOpenCommodityFuturesAndClearedSwapContracts" xlink:to="lab_unl_UnrealizedGainLossOnOpenCommodityFuturesAndClearedSwapContracts" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InvestmentOwnedBalancePrincipalAmount" xlink:label="loc_us-gaap_InvestmentOwnedBalancePrincipalAmount" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_InvestmentOwnedBalancePrincipalAmount" xml:lang="en-US">Investment Owned, Balance, Principal Amount</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_InvestmentOwnedBalancePrincipalAmount" xml:lang="en-US">Principal Amount</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentOwnedBalancePrincipalAmount" xlink:to="lab_us-gaap_InvestmentOwnedBalancePrincipalAmount" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InvestmentOwnedUnderlyingFaceAmountAtMarketValue" xlink:label="loc_us-gaap_InvestmentOwnedUnderlyingFaceAmountAtMarketValue" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_InvestmentOwnedUnderlyingFaceAmountAtMarketValue" xml:lang="en-US">Investment Owned, Underlying Face Amount, At Market Value</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_InvestmentOwnedUnderlyingFaceAmountAtMarketValue" xml:lang="en-US">Market Values</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentOwnedUnderlyingFaceAmountAtMarketValue" xlink:to="lab_us-gaap_InvestmentOwnedUnderlyingFaceAmountAtMarketValue" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_PercentageOfPartnersCapital" xlink:label="loc_unl_PercentageOfPartnersCapital" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_PercentageOfPartnersCapital" xml:lang="en-US">Percentage Of Partners Capital</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_unl_PercentageOfPartnersCapital" xml:lang="en-US">% of Partners&#39; Capital</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_PercentageOfPartnersCapital" xml:lang="en-US">Percentage of Partners Capital</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_PercentageOfPartnersCapital" xlink:to="lab_unl_PercentageOfPartnersCapital" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_DisclosureEffectOfDerivativeInstrumentsOnCondensedStatementsOfOperationsAbstract" xlink:label="loc_unl_DisclosureEffectOfDerivativeInstrumentsOnCondensedStatementsOfOperationsAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_DisclosureEffectOfDerivativeInstrumentsOnCondensedStatementsOfOperationsAbstract" xml:lang="en-US">Disclosure Effect Of Derivative Instruments On Condensed Statements Of Operations [Abstract]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_DisclosureEffectOfDerivativeInstrumentsOnCondensedStatementsOfOperationsAbstract" xml:lang="en-US">Disclosure - Effect of Derivative Instruments on Condensed Statements of Operations [Abstract]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_DisclosureEffectOfDerivativeInstrumentsOnCondensedStatementsOfOperationsAbstract" xlink:to="lab_unl_DisclosureEffectOfDerivativeInstrumentsOnCondensedStatementsOfOperationsAbstract" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" xml:lang="en-US">Derivative Instruments Gain Loss By Hedging Relationship By Income Statement Location By Derivative Instrument Risk [Table]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" xlink:to="lab_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_DerivativeNatureAxis" xlink:label="loc_unl_DerivativeNatureAxis" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_DerivativeNatureAxis" xml:lang="en-US">Derivative Nature [Axis]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_DerivativeNatureAxis" xlink:to="lab_unl_DerivativeNatureAxis" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_DerivativeNatureDomain" xlink:label="loc_unl_DerivativeNatureDomain" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_DerivativeNatureDomain" xml:lang="en-US">Derivative Nature [Domain]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_DerivativeNatureDomain" xlink:to="lab_unl_DerivativeNatureDomain" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_ClosedPositionsMember" xlink:label="loc_unl_ClosedPositionsMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_ClosedPositionsMember" xml:lang="en-US">Closed Positions [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_ClosedPositionsMember" xml:lang="en-US">Realized gain (loss) on closed positions</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_ClosedPositionsMember" xml:lang="en-US">Closed Positions [Member]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_ClosedPositionsMember" xlink:to="lab_unl_ClosedPositionsMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_OpenPositionMember" xlink:label="loc_unl_OpenPositionMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_OpenPositionMember" xml:lang="en-US">Open Position [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_OpenPositionMember" xml:lang="en-US">Change in unrealized gain (loss) on open positions</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_OpenPositionMember" xml:lang="en-US">Open Position [Member]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_OpenPositionMember" xlink:to="lab_unl_OpenPositionMember" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GainLossOnSaleOfInvestments" xlink:label="loc_us-gaap_GainLossOnSaleOfInvestments" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_GainLossOnSaleOfInvestments" xml:lang="en-US">Gain Loss On Sale Of Investments</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/definitionGuidance" xlink:label="lab_us-gaap_GainLossOnSaleOfInvestments" xml:lang="en-US">Realized Gain (Loss) on Derivatives Recognized in Income</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_GainLossOnSaleOfInvestments" xml:lang="en-US">Realized gain (loss) on closed futures contracts</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GainLossOnSaleOfInvestments" xlink:to="lab_us-gaap_GainLossOnSaleOfInvestments" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts" xlink:label="loc_us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts" xml:lang="en-US">Unrealized Gain Loss On Derivatives and Commodity Contracts</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts" xml:lang="en-US">Change in Unrealized Gain (Loss) on Derivatives Recognized in Income</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts" xml:lang="en-US">Unrealized (gain) loss on open futures contracts</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts" xlink:to="lab_us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_InvestmentSecuritiesSeriesOneAxis" xlink:label="loc_unl_InvestmentSecuritiesSeriesOneAxis" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_InvestmentSecuritiesSeriesOneAxis" xml:lang="en-US">Investment Securities Series One [Axis]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_InvestmentSecuritiesSeriesOneAxis" xlink:to="lab_unl_InvestmentSecuritiesSeriesOneAxis" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InvestmentOwnedSubjectToOptionExerciseDates" xlink:label="loc_us-gaap_InvestmentOwnedSubjectToOptionExerciseDates" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_InvestmentOwnedSubjectToOptionExerciseDates" xml:lang="en-US">Investment Owned, Subject To Option, Exercise Dates</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_InvestmentOwnedSubjectToOptionExerciseDates" xml:lang="en-US">Expiration date</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentOwnedSubjectToOptionExerciseDates" xlink:to="lab_us-gaap_InvestmentOwnedSubjectToOptionExerciseDates" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentCollateralAmount" xlink:label="loc_us-gaap_DebtInstrumentCollateralAmount" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DebtInstrumentCollateralAmount" xml:lang="en-US">Debt Instrument, Collateral Amount</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentCollateralAmount" xlink:to="lab_us-gaap_DebtInstrumentCollateralAmount" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage" xml:lang="en-US">Debt Instrument, Interest Rate, Stated Percentage</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage" xml:lang="en-US">Interest Rate</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:to="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeStatementAbstract" xlink:label="loc_us-gaap_IncomeStatementAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_IncomeStatementAbstract" xml:lang="en-US">Income Statement [Abstract]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeStatementAbstract" xlink:to="lab_us-gaap_IncomeStatementAbstract" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RevenuesAbstract" xlink:label="loc_us-gaap_RevenuesAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_RevenuesAbstract" xml:lang="en-US">Revenues [Abstract]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_RevenuesAbstract" xml:lang="en-US">Income</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevenuesAbstract" xlink:to="lab_us-gaap_RevenuesAbstract" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_GainLossOnCommodityFuturesAbstract" xlink:label="loc_unl_GainLossOnCommodityFuturesAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_GainLossOnCommodityFuturesAbstract" xml:lang="en-US">Gain Loss On Commodity Futures [Abstract]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_unl_GainLossOnCommodityFuturesAbstract" xml:lang="en-US">Gain (loss) on trading of commodity futures contracts:</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_GainLossOnCommodityFuturesAbstract" xml:lang="en-US">Gain (Loss) On Commodity Futures [Abstract]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_GainLossOnCommodityFuturesAbstract" xlink:to="lab_unl_GainLossOnCommodityFuturesAbstract" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_UnrealizedGainLossOnInvestments" xlink:label="loc_us-gaap_UnrealizedGainLossOnInvestments" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_UnrealizedGainLossOnInvestments" xml:lang="en-US">Unrealized Gain Loss On Investments</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_UnrealizedGainLossOnInvestments" xml:lang="en-US">Change in unrealized gain (loss) on open futures contracts</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnrealizedGainLossOnInvestments" xlink:to="lab_us-gaap_UnrealizedGainLossOnInvestments" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DividendIncomeOperating" xlink:label="loc_us-gaap_DividendIncomeOperating" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_DividendIncomeOperating" xml:lang="en-US">Dividend Income Operating</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_DividendIncomeOperating" xml:lang="en-US">Dividend income</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DividendIncomeOperating" xlink:to="lab_us-gaap_DividendIncomeOperating" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InterestIncomeOperating" xlink:label="loc_us-gaap_InterestIncomeOperating" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_InterestIncomeOperating" xml:lang="en-US">Interest Income Operating</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_InterestIncomeOperating" xml:lang="en-US">Interest income</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestIncomeOperating" xlink:to="lab_us-gaap_InterestIncomeOperating" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FeesAndCommissions" xlink:label="loc_us-gaap_FeesAndCommissions" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_FeesAndCommissions" xml:lang="en-US">Fees and Commissions</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_FeesAndCommissions" xml:lang="en-US">ETF transaction fees</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FeesAndCommissions" xlink:to="lab_us-gaap_FeesAndCommissions" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingExpensesAbstract" xlink:label="loc_us-gaap_OperatingExpensesAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_OperatingExpensesAbstract" xml:lang="en-US">Operating Expenses [Abstract]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_OperatingExpensesAbstract" xml:lang="en-US">Expenses</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingExpensesAbstract" xlink:to="lab_us-gaap_OperatingExpensesAbstract" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AssetManagementCosts" xlink:label="loc_us-gaap_AssetManagementCosts" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AssetManagementCosts" xml:lang="en-US">Asset Management Costs</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_AssetManagementCosts" xml:lang="en-US">General Partner management fees (Note 3)</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetManagementCosts" xlink:to="lab_us-gaap_AssetManagementCosts" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProfessionalFees" xlink:label="loc_us-gaap_ProfessionalFees" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ProfessionalFees" xml:lang="en-US">Professional Fees</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ProfessionalFees" xml:lang="en-US">Professional fees</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProfessionalFees" xlink:to="lab_us-gaap_ProfessionalFees" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_NetOperatingExpenses" xlink:label="loc_unl_NetOperatingExpenses" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_NetOperatingExpenses" xml:lang="en-US">Net Operating Expenses</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_unl_NetOperatingExpenses" xml:lang="en-US">Net expenses</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_unl_NetOperatingExpenses" xml:lang="en-US">Net expenses</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_NetOperatingExpenses" xml:lang="en-US">Total expenses net of waiver.</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_NetOperatingExpenses" xlink:to="lab_unl_NetOperatingExpenses" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_NetIncomeLoss" xml:lang="en-US">Net Income (Loss) Attributable To Parent</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_NetIncomeLoss" xml:lang="en-US">Net income (loss)</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_NetIncomeLoss" xml:lang="en-US">Net income (loss)</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_NetIncomeLoss" xml:lang="en-US">Net income (loss)</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetIncomeLoss" xlink:to="lab_us-gaap_NetIncomeLoss" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax" xlink:label="loc_us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax" xml:lang="en-US">Net Income (Loss), Per Outstanding Limited Partnership Unit, Basic, Net of Tax, Total</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax" xml:lang="en-US">Net income (loss) per limited partnership share</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax" xml:lang="en-US">Net income (loss) per share</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax" xlink:to="lab_us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted" xlink:label="loc_us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted" xml:lang="en-US">Net Income (Loss), Net of Tax, Per Outstanding Limited Partnership Unit, Diluted, Total</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted" xml:lang="en-US">Net income (loss) per weighted average limited partnership share</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted" xlink:to="lab_us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding" xlink:label="loc_us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding" xml:lang="en-US">Weighted Average Limited Partnership Units Outstanding</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding" xml:lang="en-US">Weighted average limited partnership shares outstanding</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding" xlink:to="lab_us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementOfPartnersCapitalAbstract" xlink:label="loc_us-gaap_StatementOfPartnersCapitalAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_StatementOfPartnersCapitalAbstract" xml:lang="en-US">Statement Of Partners Capital [Abstract]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementOfPartnersCapitalAbstract" xlink:to="lab_us-gaap_StatementOfPartnersCapitalAbstract" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PartnerCapitalComponentsAxis" xlink:label="loc_us-gaap_PartnerCapitalComponentsAxis" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PartnerCapitalComponentsAxis" xml:lang="en-US">Partner Capital Components [Axis]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PartnerCapitalComponentsAxis" xlink:to="lab_us-gaap_PartnerCapitalComponentsAxis" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PartnerCapitalComponentsDomain" xlink:label="loc_us-gaap_PartnerCapitalComponentsDomain" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PartnerCapitalComponentsDomain" xml:lang="en-US">Partner Capital Components [Domain]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PartnerCapitalComponentsDomain" xlink:to="lab_us-gaap_PartnerCapitalComponentsDomain" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GeneralPartnerMember" xlink:label="loc_us-gaap_GeneralPartnerMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_GeneralPartnerMember" xml:lang="en-US">General Partner [Member]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GeneralPartnerMember" xlink:to="lab_us-gaap_GeneralPartnerMember" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LimitedPartnerMember" xlink:label="loc_us-gaap_LimitedPartnerMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LimitedPartnerMember" xml:lang="en-US">Limited Partner [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_LimitedPartnerMember" xml:lang="en-US">Limited Partners [Member]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LimitedPartnerMember" xlink:to="lab_us-gaap_LimitedPartnerMember" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PartnersCapitalAccountContributions" xlink:label="loc_us-gaap_PartnersCapitalAccountContributions" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PartnersCapitalAccountContributions" xml:lang="en-US">Partners&#39; Capital Account, Contributions</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_PartnersCapitalAccountContributions" xml:lang="en-US">Addition of partnership share</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PartnersCapitalAccountContributions" xlink:to="lab_us-gaap_PartnersCapitalAccountContributions" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PartnersCapitalAccountRedemptions" xlink:label="loc_us-gaap_PartnersCapitalAccountRedemptions" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PartnersCapitalAccountRedemptions" xml:lang="en-US">Partners Capital Account Redemptions</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_PartnersCapitalAccountRedemptions" xml:lang="en-US">Redemption of partnership shares</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PartnersCapitalAccountRedemptions" xlink:to="lab_us-gaap_PartnersCapitalAccountRedemptions" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PartnersCapitalAccountUnitsContributed" xlink:label="loc_us-gaap_PartnersCapitalAccountUnitsContributed" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PartnersCapitalAccountUnitsContributed" xml:lang="en-US">Partners&#39; Capital Account, Units, Contributed</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_PartnersCapitalAccountUnitsContributed" xml:lang="en-US">Addition of partnership share</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PartnersCapitalAccountUnitsContributed" xlink:to="lab_us-gaap_PartnersCapitalAccountUnitsContributed" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:label="loc_us-gaap_StatementOfCashFlowsAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_StatementOfCashFlowsAbstract" xml:lang="en-US">Statement Of Cash Flows [Abstract]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract" xlink:to="lab_us-gaap_StatementOfCashFlowsAbstract" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract" xml:lang="en-US">Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract" 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="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract" xlink:to="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xml:lang="en-US">Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xml:lang="en-US">Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInFinancialInstrumentsUsedInOperatingActivities" xlink:label="loc_us-gaap_IncreaseDecreaseInFinancialInstrumentsUsedInOperatingActivities" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_IncreaseDecreaseInFinancialInstrumentsUsedInOperatingActivities" xml:lang="en-US">Increase Decrease In Financial Instruments Used In Operating Activities</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_IncreaseDecreaseInFinancialInstrumentsUsedInOperatingActivities" xml:lang="en-US">(Increase) decrease in commodity futures trading account - cash and cash equivalents</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInFinancialInstrumentsUsedInOperatingActivities" xlink:to="lab_us-gaap_IncreaseDecreaseInFinancialInstrumentsUsedInOperatingActivities" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseDueFromOfficersAndStockholders" xlink:label="loc_us-gaap_IncreaseDecreaseDueFromOfficersAndStockholders" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_IncreaseDecreaseDueFromOfficersAndStockholders" xml:lang="en-US">Increase Decrease Due From Officers and Stockholders</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_IncreaseDecreaseDueFromOfficersAndStockholders" xml:lang="en-US">(Increase) decrease in receivable from General Partner</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseDueFromOfficersAndStockholders" xlink:to="lab_us-gaap_IncreaseDecreaseDueFromOfficersAndStockholders" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInDividendsReceivable" xlink:label="loc_us-gaap_IncreaseDecreaseInDividendsReceivable" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_IncreaseDecreaseInDividendsReceivable" xml:lang="en-US">Increase Decrease In Dividends Receivable</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_IncreaseDecreaseInDividendsReceivable" xml:lang="en-US">(Increase) decrease in dividends receivable</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInDividendsReceivable" xlink:to="lab_us-gaap_IncreaseDecreaseInDividendsReceivable" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_IncreaseDecreaseInDirectorsFeeReceivable" xlink:label="loc_unl_IncreaseDecreaseInDirectorsFeeReceivable" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_IncreaseDecreaseInDirectorsFeeReceivable" xml:lang="en-US">Increase Decrease In Directors Fee Receivable</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_unl_IncreaseDecreaseInDirectorsFeeReceivable" xml:lang="en-US">(Increase) decrease in directors&#39; fees and insurance receivable</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_IncreaseDecreaseInDirectorsFeeReceivable" xml:lang="en-US">Receivable From Officers And Directors For Issuance Of Capital Stock</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_IncreaseDecreaseInDirectorsFeeReceivable" xlink:to="lab_unl_IncreaseDecreaseInDirectorsFeeReceivable" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables" xml:lang="en-US">Increase (Decrease) in Accounts and Other Receivables</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables" xml:lang="en-US">(Increase) decrease in ETF transaction fees receivable</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables" xlink:to="lab_us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_IncreaseDecreaseManagementFeesPayable" xlink:label="loc_unl_IncreaseDecreaseManagementFeesPayable" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_IncreaseDecreaseManagementFeesPayable" xml:lang="en-US">Increase Decrease Management Fees Payable</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_IncreaseDecreaseManagementFeesPayable" xml:lang="en-US">Increase (decrease) in General Partner management fees payable</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_IncreaseDecreaseManagementFeesPayable" xml:lang="en-US">Increase (Decrease) Management Fees Payable</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_IncreaseDecreaseManagementFeesPayable" xlink:to="lab_unl_IncreaseDecreaseManagementFeesPayable" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_IncreaseDecreaseInProfessionalFeesPayable" xlink:label="loc_unl_IncreaseDecreaseInProfessionalFeesPayable" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_IncreaseDecreaseInProfessionalFeesPayable" xml:lang="en-US">Increase Decrease In Professional Fees Payable</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_IncreaseDecreaseInProfessionalFeesPayable" xml:lang="en-US">Increase (decrease) in professional fees payable</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_IncreaseDecreaseInProfessionalFeesPayable" xml:lang="en-US">Increase (Decrease) In Professional Fees Payable</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_IncreaseDecreaseInProfessionalFeesPayable" xlink:to="lab_unl_IncreaseDecreaseInProfessionalFeesPayable" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xml:lang="en-US">Net Cash Provided by (Used in) Operating Activities, Continuing Operations</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xml:lang="en-US">Net cash provided by (used in) operating activities</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" xlink:to="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xml:lang="en-US">Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" 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="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" xlink:to="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperationsAbstract" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProceedsFromPartnershipContribution" xlink:label="loc_us-gaap_ProceedsFromPartnershipContribution" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_ProceedsFromPartnershipContribution" xml:lang="en-US">Proceeds From Partnership Contribution</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_ProceedsFromPartnershipContribution" xml:lang="en-US">Addition of partnership shares</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromPartnershipContribution" xlink:to="lab_us-gaap_ProceedsFromPartnershipContribution" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_PaymentsToPartnershipRedemption" xlink:label="loc_unl_PaymentsToPartnershipRedemption" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_PaymentsToPartnershipRedemption" xml:lang="en-US">Payments To Partnership Redemption</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="lab_unl_PaymentsToPartnershipRedemption" xml:lang="en-US">Redemption of partnership shares</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_PaymentsToPartnershipRedemption" xml:lang="en-US">Payments To Partnership Redemption</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_PaymentsToPartnershipRedemption" xlink:to="lab_unl_PaymentsToPartnershipRedemption" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations" xml:lang="en-US">Net Cash Provided by (Used in) Financing Activities, Continuing Operations</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations" xml:lang="en-US">Net cash provided by (used in) financing activities</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations" xlink:to="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xml:lang="en-US">Cash and Cash Equivalents Period Increase Decrease</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xml:lang="en-US">Net Increase (Decrease) in Cash and Cash Equivalents</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:to="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:label="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xml:lang="en-US">Organization and Business [Abstract]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:to="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock" xlink:label="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock" xml:lang="en-US">Organization Consolidation and Presentation Of Financial Statements Disclosure [Text Block]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock" xml:lang="en-US">Organization and Business</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock" xlink:to="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_IncreaseDecreaseInLicenseFeesPayable" xlink:label="loc_unl_IncreaseDecreaseInLicenseFeesPayable" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_IncreaseDecreaseInLicenseFeesPayable" xml:lang="en-US">Increase Decrease In License Fees Payable</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_IncreaseDecreaseInLicenseFeesPayable" xml:lang="en-US">Increase (decrease) in license fees payable</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_IncreaseDecreaseInLicenseFeesPayable" xml:lang="en-US">Increase (Decrease) in License Fees Payable.</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_IncreaseDecreaseInLicenseFeesPayable" xlink:to="lab_unl_IncreaseDecreaseInLicenseFeesPayable" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquity" xml:lang="en-US">Liabilities and Stockholders Equity</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquity" xml:lang="en-US">Total liabilities and partners&#39; capital</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity" xlink:to="lab_us-gaap_LiabilitiesAndStockholdersEquity" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherReceivables" xlink:label="loc_us-gaap_OtherReceivables" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_OtherReceivables" xml:lang="en-US">Other Receivables</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_OtherReceivables" xml:lang="en-US">ETF transaction fees receivable</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherReceivables" xlink:to="lab_us-gaap_OtherReceivables" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_Assets" xml:lang="en-US">Assets, Total</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_Assets" xml:lang="en-US">Total assets</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Assets" xlink:to="lab_us-gaap_Assets" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_Revenues" xml:lang="en-US">Revenues</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_Revenues" xml:lang="en-US">Total income (loss)</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_us-gaap_Revenues" xml:lang="en-US">Total income (loss)</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Revenues" xlink:to="lab_us-gaap_Revenues" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingExpenses" xlink:label="loc_us-gaap_OperatingExpenses" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_OperatingExpenses" xml:lang="en-US">Operating Expenses</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="lab_us-gaap_OperatingExpenses" xml:lang="en-US">Total expenses</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_OperatingExpenses" xml:lang="en-US">Total expenses</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingExpenses" xlink:to="lab_us-gaap_OperatingExpenses" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_NetAssetValuePerUnitAbstract" xlink:label="loc_unl_NetAssetValuePerUnitAbstract" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_NetAssetValuePerUnitAbstract" xml:lang="en-US">Net Asset Value Per Unit [Abstract]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/definitionGuidance" xlink:label="lab_unl_NetAssetValuePerUnitAbstract" xml:lang="en-US">Net Asset Value Per Share:</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_NetAssetValuePerUnitAbstract" xml:lang="en-US">Net Asset Value Per Unit:</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_NetAssetValuePerUnitAbstract" xlink:to="lab_unl_NetAssetValuePerUnitAbstract" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PartnersCapitalAccountUnitsRedeemed" xlink:label="loc_us-gaap_PartnersCapitalAccountUnitsRedeemed" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_PartnersCapitalAccountUnitsRedeemed" xml:lang="en-US">Partners Capital Account Units Redeemed</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_us-gaap_PartnersCapitalAccountUnitsRedeemed" xml:lang="en-US">Redemption of partnership shares</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PartnersCapitalAccountUnitsRedeemed" xlink:to="lab_us-gaap_PartnersCapitalAccountUnitsRedeemed" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_MaximumAggregateCompensationPaidForDistributionRelatedServices" xlink:label="loc_unl_MaximumAggregateCompensationPaidForDistributionRelatedServices" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_MaximumAggregateCompensationPaidForDistributionRelatedServices" xml:lang="en-US">Maximum Aggregate Compensation Paid For Distribution Related Services</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_unl_MaximumAggregateCompensationPaidForDistributionRelatedServices" xml:lang="en-US">Maximum Aggregate Compensation Paid For Distribution Related Services</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_MaximumAggregateCompensationPaidForDistributionRelatedServices" xml:lang="en-US">Maximum percentage of gross proceeds from offering paid for distribution related services as compensation.</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_MaximumAggregateCompensationPaidForDistributionRelatedServices" xlink:to="lab_unl_MaximumAggregateCompensationPaidForDistributionRelatedServices" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_MarketingAgentAndAffliateOfUscfMember" xlink:label="loc_unl_MarketingAgentAndAffliateOfUscfMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_MarketingAgentAndAffliateOfUscfMember" xml:lang="en-US">Marketing Agent And Affliate Of Uscf [Member]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_MarketingAgentAndAffliateOfUscfMember" xlink:to="lab_unl_MarketingAgentAndAffliateOfUscfMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_FeesPaidAndRelatedPartyTransactionsLineItems" xlink:label="loc_unl_FeesPaidAndRelatedPartyTransactionsLineItems" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_FeesPaidAndRelatedPartyTransactionsLineItems" xml:lang="en-US">Fees Paid and Related Party Transactions [Line Items]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_FeesPaidAndRelatedPartyTransactionsLineItems" xml:lang="en-US">Fees Paid and Related Party Transactions [Line Items]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="lab_unl_FeesPaidAndRelatedPartyTransactionsLineItems" xml:lang="en-US">Fees Paid and Related Party Transactions [Line Items]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_FeesPaidAndRelatedPartyTransactionsLineItems" xlink:to="lab_unl_FeesPaidAndRelatedPartyTransactionsLineItems" />

    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_us-gaap_SubsequentEventTypeDomain" 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="loc_us-gaap_SubsequentEventTypeDomain" xlink:to="lab_us-gaap_SubsequentEventTypeDomain" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_GoldmanSachsFinancialSquareFundsGovernmentFundClassFsMember" xlink:label="loc_unl_GoldmanSachsFinancialSquareFundsGovernmentFundClassFsMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_GoldmanSachsFinancialSquareFundsGovernmentFundClassFsMember" xml:lang="en-US">Goldman Sachs Financial Square Funds Government Fund Class Fs [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_GoldmanSachsFinancialSquareFundsGovernmentFundClassFsMember" xml:lang="en-US">Goldman Sachs Financial Square Funds - Government Fund - Class FS [Member]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_GoldmanSachsFinancialSquareFundsGovernmentFundClassFsMember" xlink:to="lab_unl_GoldmanSachsFinancialSquareFundsGovernmentFundClassFsMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_MorganStanleyInstitutionalLiquidityFundGovernmentPortfolioMember" xlink:label="loc_unl_MorganStanleyInstitutionalLiquidityFundGovernmentPortfolioMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_MorganStanleyInstitutionalLiquidityFundGovernmentPortfolioMember" xml:lang="en-US">Morgan Stanley Institutional Liquidity Fund Government Portfolio [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_MorganStanleyInstitutionalLiquidityFundGovernmentPortfolioMember" xml:lang="en-US">Morgan Stanley Institutional Liquidity Funds - Government Portfolio [Member]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_MorganStanleyInstitutionalLiquidityFundGovernmentPortfolioMember" xlink:to="lab_unl_MorganStanleyInstitutionalLiquidityFundGovernmentPortfolioMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_InvestmentSecuritiesSeriesOneDomain" xlink:label="loc_unl_InvestmentSecuritiesSeriesOneDomain" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_InvestmentSecuritiesSeriesOneDomain" xml:lang="en-US">Investment Securities Series One [Domain]</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_InvestmentSecuritiesSeriesOneDomain" xlink:to="lab_unl_InvestmentSecuritiesSeriesOneDomain" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_UsTreasuryBillsOneMember" xlink:label="loc_unl_UsTreasuryBillsOneMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_UsTreasuryBillsOneMember" xml:lang="en-US">U.S. Treasury Bills One [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_UsTreasuryBillsOneMember" xml:lang="en-US">U.S. Treasury Bills: 0.38%, 7/21/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_UsTreasuryBillsOneMember" xlink:to="lab_unl_UsTreasuryBillsOneMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_UsTreasuryBillsTwoMember" xlink:label="loc_unl_UsTreasuryBillsTwoMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_UsTreasuryBillsTwoMember" xml:lang="en-US">U.S. Treasury Bills Two [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_UsTreasuryBillsTwoMember" xml:lang="en-US">U.S. Treasury Bills: 0.39%, 7/28/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_UsTreasuryBillsTwoMember" xlink:to="lab_unl_UsTreasuryBillsTwoMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_UsTreasuryBillsThreeMember" xlink:label="loc_unl_UsTreasuryBillsThreeMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_UsTreasuryBillsThreeMember" xml:lang="en-US">U.S. Treasury Bills Three [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_unl_UsTreasuryBillsThreeMember" xml:lang="en-US">U.S. Treasury Bills: 0.42%, 8/04/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_UsTreasuryBillsThreeMember" xlink:to="lab_unl_UsTreasuryBillsThreeMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_UsTreasuryBillsFourMember" xlink:label="loc_unl_UsTreasuryBillsFourMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_UsTreasuryBillsFourMember" xml:lang="en-US">U.S. Treasury Bills Four [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_UsTreasuryBillsFourMember" xml:lang="en-US">U.S. Treasury Bills: 0.41%, 8/11/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_UsTreasuryBillsFourMember" xlink:to="lab_unl_UsTreasuryBillsFourMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_UsTreasuryBillsFiveMember" xlink:label="loc_unl_UsTreasuryBillsFiveMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_UsTreasuryBillsFiveMember" xml:lang="en-US">U.S. Treasury Bills Five [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_unl_UsTreasuryBillsFiveMember" xml:lang="en-US">U.S. Treasury Bills: 0.43%, 8/18/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_UsTreasuryBillsFiveMember" xlink:to="lab_unl_UsTreasuryBillsFiveMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_UsTreasuryBillsSixMember" xlink:label="loc_unl_UsTreasuryBillsSixMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_UsTreasuryBillsSixMember" xml:lang="en-US">U.S. Treasury Bills Six [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_UsTreasuryBillsSixMember" xml:lang="en-US">U.S. Treasury Bills: 0.45%, 8/25/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_UsTreasuryBillsSixMember" xlink:to="lab_unl_UsTreasuryBillsSixMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_UsTreasuryBillsSevenMemberMember" xlink:label="loc_unl_UsTreasuryBillsSevenMemberMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_UsTreasuryBillsSevenMemberMember" xml:lang="en-US">U.S. Treasury Bills Seven [Member] [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_UsTreasuryBillsSevenMemberMember" xml:lang="en-US">U.S. Treasury Bills: 0.48%, 9/01/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_UsTreasuryBillsSevenMemberMember" xlink:to="lab_unl_UsTreasuryBillsSevenMemberMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_UsTreasuryBillsEightMemberMember" xlink:label="loc_unl_UsTreasuryBillsEightMemberMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_UsTreasuryBillsEightMemberMember" xml:lang="en-US">U.S. Treasury Bills Eight [Member] [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_UsTreasuryBillsEightMemberMember" xml:lang="en-US">U.S. Treasury Bills: 0.45%, 9/15/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_UsTreasuryBillsEightMemberMember" xlink:to="lab_unl_UsTreasuryBillsEightMemberMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_UsTreasuryBillsNineMemberMember" xlink:label="loc_unl_UsTreasuryBillsNineMemberMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_UsTreasuryBillsNineMemberMember" xml:lang="en-US">U.S. Treasury Bills Nine [Member] [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_UsTreasuryBillsNineMemberMember" xml:lang="en-US">U.S. Treasury Bills: 0.44%, 9/22/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_UsTreasuryBillsNineMemberMember" xlink:to="lab_unl_UsTreasuryBillsNineMemberMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_UsTreasuryBillsTenMemberMember" xlink:label="loc_unl_UsTreasuryBillsTenMemberMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_UsTreasuryBillsTenMemberMember" xml:lang="en-US">U.S. Treasury Bills Ten [Member] [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_UsTreasuryBillsTenMemberMember" xml:lang="en-US">U.S. Treasury Bills: 0.39%, 10/27/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_UsTreasuryBillsTenMemberMember" xlink:to="lab_unl_UsTreasuryBillsTenMemberMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_UsTreasuryBillsElevenMember" xlink:label="loc_unl_UsTreasuryBillsElevenMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_UsTreasuryBillsElevenMember" xml:lang="en-US">U.S. Treasury Bills Eleven [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_UsTreasuryBillsElevenMember" xml:lang="en-US">U.S. Treasury Bills: 0.37%, 11/03/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_UsTreasuryBillsElevenMember" xlink:to="lab_unl_UsTreasuryBillsElevenMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_UsTreasuryBillsTwevleMemberMember" xlink:label="loc_unl_UsTreasuryBillsTwevleMemberMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_UsTreasuryBillsTwevleMemberMember" xml:lang="en-US">U.S. Treasury Bills Twevle [Member] [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_UsTreasuryBillsTwevleMemberMember" xml:lang="en-US">U.S. Treasury Bills: 0.39%, 11/17/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_UsTreasuryBillsTwevleMemberMember" xlink:to="lab_unl_UsTreasuryBillsTwevleMemberMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_UsTreasuryBillsThirteenMember" xlink:label="loc_unl_UsTreasuryBillsThirteenMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_UsTreasuryBillsThirteenMember" xml:lang="en-US">U.S. Treasury Bills Thirteen [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="lab_unl_UsTreasuryBillsThirteenMember" xml:lang="en-US">U.S. Treasury Bills: 0.47%, 12/01/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_UsTreasuryBillsThirteenMember" xlink:to="lab_unl_UsTreasuryBillsThirteenMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_UsTreasuryBillsSixMemberMember" xlink:label="loc_unl_UsTreasuryBillsSixMemberMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_UsTreasuryBillsSixMemberMember" xml:lang="en-US">U.S. Treasury Bills Six [Member] [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_unl_UsTreasuryBillsSixMemberMember" xml:lang="en-US">U.S. Treasury Bills: 0.45%, 8/25/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_UsTreasuryBillsSixMemberMember" xlink:to="lab_unl_UsTreasuryBillsSixMemberMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_UsTreasuryBillsSevenMember" xlink:label="loc_unl_UsTreasuryBillsSevenMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_UsTreasuryBillsSevenMember" xml:lang="en-US">U.S. Treasury Bills Seven [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_unl_UsTreasuryBillsSevenMember" xml:lang="en-US">U.S. Treasury Bills: 0.48%, 9/01/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_UsTreasuryBillsSevenMember" xlink:to="lab_unl_UsTreasuryBillsSevenMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_UsTreasuryBillsEightMember" xlink:label="loc_unl_UsTreasuryBillsEightMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_UsTreasuryBillsEightMember" xml:lang="en-US">U.S. Treasury Bills Eight [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_unl_UsTreasuryBillsEightMember" xml:lang="en-US">U.S. Treasury Bills: 0.45%, 9/15/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_UsTreasuryBillsEightMember" xlink:to="lab_unl_UsTreasuryBillsEightMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_UsTreasuryBillsNineMember" xlink:label="loc_unl_UsTreasuryBillsNineMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_UsTreasuryBillsNineMember" xml:lang="en-US">U.S. Treasury Bills Nine [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_unl_UsTreasuryBillsNineMember" xml:lang="en-US">U.S. Treasury Bills: 0.44%, 9/22/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_UsTreasuryBillsNineMember" xlink:to="lab_unl_UsTreasuryBillsNineMember" />

    <loc xlink:type="locator" xlink:href="unl-20160630.xsd#unl_UsTreasuryBillsTenMember" xlink:label="loc_unl_UsTreasuryBillsTenMember" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_unl_UsTreasuryBillsTenMember" xml:lang="en-US">U.S. Treasury Bills Ten [Member]</label>

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="lab_unl_UsTreasuryBillsTenMember" xml:lang="en-US">U.S. Treasury Bills: 0.39%, 10/27/2016</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_unl_UsTreasuryBillsTenMember" xlink:to="lab_unl_UsTreasuryBillsTenMember" />

    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentType" xlink:label="loc_dei_DocumentType" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_DocumentType" xml:lang="en-US">Document Type</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentType" xlink:to="lab_dei_DocumentType" />

    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_AmendmentFlag" xlink:label="loc_dei_AmendmentFlag" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_AmendmentFlag" xml:lang="en-US">Amendment Flag</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_AmendmentFlag" xlink:to="lab_dei_AmendmentFlag" />

    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentPeriodEndDate" xlink:label="loc_dei_DocumentPeriodEndDate" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_DocumentPeriodEndDate" xml:lang="en-US">Document Period End Date</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentPeriodEndDate" xlink:to="lab_dei_DocumentPeriodEndDate" />

    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentFiscalYearFocus" xlink:label="loc_dei_DocumentFiscalYearFocus" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_DocumentFiscalYearFocus" xml:lang="en-US">Document Fiscal Year Focus</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentFiscalYearFocus" xlink:to="lab_dei_DocumentFiscalYearFocus" />

    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="loc_dei_DocumentFiscalPeriodFocus" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_DocumentFiscalPeriodFocus" xml:lang="en-US">Document Fiscal Period Focus</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentFiscalPeriodFocus" xlink:to="lab_dei_DocumentFiscalPeriodFocus" />

    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityRegistrantName" xlink:label="loc_dei_EntityRegistrantName" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntityRegistrantName" xml:lang="en-US">Entity Registrant Name</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityRegistrantName" xlink:to="lab_dei_EntityRegistrantName" />

    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityCentralIndexKey" xlink:label="loc_dei_EntityCentralIndexKey" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntityCentralIndexKey" 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="loc_dei_EntityCentralIndexKey" xlink:to="lab_dei_EntityCentralIndexKey" />

    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_CurrentFiscalYearEndDate" xlink:label="loc_dei_CurrentFiscalYearEndDate" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_CurrentFiscalYearEndDate" xml:lang="en-US">Current Fiscal Year End Date</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_CurrentFiscalYearEndDate" xlink:to="lab_dei_CurrentFiscalYearEndDate" />

    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityFilerCategory" xlink:label="loc_dei_EntityFilerCategory" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntityFilerCategory" xml:lang="en-US">Entity Filer Category</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityFilerCategory" xlink:to="lab_dei_EntityFilerCategory" />

    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_TradingSymbol" xlink:label="loc_dei_TradingSymbol" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_TradingSymbol" xml:lang="en-US">Trading Symbol</label>

    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_TradingSymbol" xlink:to="lab_dei_TradingSymbol" />

    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityCommonStockSharesOutstanding" xlink:label="loc_dei_EntityCommonStockSharesOutstanding" />

    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="lab_dei_EntityCommonStockSharesOutstanding" xml:lang="en-US">Entity Common Stock, Shares Outstanding</label>

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