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    <link:label id="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_C116CFED0C048EFD0DA90AA83526E00B_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_C116CFED0C048EFD0DA90AA83526E00B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, Maximum Borrowing Capacity</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_LineOfCreditFacilityCapacityAvailableForSpecificPurposeOtherThanForTradePurchases" xlink:label="loc_us-gaap_LineOfCreditFacilityCapacityAvailableForSpecificPurposeOtherThanForTradePurchases_46EC12213211883C8C320AA83527E0B1" xlink:type="locator" />
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    <link:label id="lab_vrts_LineOfCreditFacilityIncreaseAdditionalBorrowingsOnConditionSatisfaction_B3BAD2F308E466953C560AA835275F39_terseLabel_en-US" xlink:label="lab_vrts_LineOfCreditFacilityIncreaseAdditionalBorrowingsOnConditionSatisfaction_B3BAD2F308E466953C560AA835275F39" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Credit facility amount increase in borrowing capacity on condition</link:label>
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    <link:label id="lab_us-gaap_LineOfCredit_8C2FD6D9E5B96F028E740AA8352713BF_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCredit_8C2FD6D9E5B96F028E740AA8352713BF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Outstanding under the Credit Facility</link:label>
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    <link:label id="lab_vrts_LineOfCreditFacilityBasisSpreadOnAlternateBaseRate_4F7DA8751C14FA289BE90AA83527AAB6_terseLabel_en-US" xlink:label="lab_vrts_LineOfCreditFacilityBasisSpreadOnAlternateBaseRate_4F7DA8751C14FA289BE90AA83527AAB6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Percentage of margin on principal amount</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingLiabilities_5D55C461EAA48279F544F200B6075822" xlink:type="locator" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapital" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapital_EE7D9B9A9AA76D177B73F200B6079230" xlink:type="locator" />
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_04E375E5301C90CDD26DF200B608FCF9_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_04E375E5301C90CDD26DF200B608FCF9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Operating Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_04E375E5301C90CDD26DF200B608FCF9" xlink:type="locator" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperationsAbstract_B6DB4FF59550E53E6661F200B608F1C8" xlink:type="locator" />
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