<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with Wdesk from Workiva-->
<!-- -->
<link:linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodStartLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodStartLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/netLabel" xlink:href="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd#netLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedNetLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedNetLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTerseLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodEndLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodEndLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTotalLabel" xlink:type="simple" />
  <link:labelLink xlink:role="http://www.xbrl.org/2003/role/link" xlink:type="extended">
    <link:label id="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_67BB7829D03D0C86362BD419A88B7180_label_en-US" xlink:label="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_67BB7829D03D0C86362BD419A88B7180" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Organization, Consolidation and Presentation of Financial Statements [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:label="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_67BB7829D03D0C86362BD419A88B7180" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_67BB7829D03D0C86362BD419A88B7180" xlink:to="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_67BB7829D03D0C86362BD419A88B7180" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfQuantifyingPriorYearMisstatementsCorrectedInCurrentYearFinancialStatementsTextBlock_9F39DF8003566331E19DD419D62C6D29_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfQuantifyingPriorYearMisstatementsCorrectedInCurrentYearFinancialStatementsTextBlock_9F39DF8003566331E19DD419D62C6D29" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Quantifying Prior Year Misstatements Corrected in Current Year Financial Statements</link:label>
    <link:label id="lab_us-gaap_ScheduleOfQuantifyingPriorYearMisstatementsCorrectedInCurrentYearFinancialStatementsTextBlock_9F39DF8003566331E19DD419D62C6D29_label_en-US" xlink:label="lab_us-gaap_ScheduleOfQuantifyingPriorYearMisstatementsCorrectedInCurrentYearFinancialStatementsTextBlock_9F39DF8003566331E19DD419D62C6D29" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Quantifying Prior Year Misstatements Corrected in Current Year Financial Statements [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfQuantifyingPriorYearMisstatementsCorrectedInCurrentYearFinancialStatementsTextBlock" xlink:label="loc_us-gaap_ScheduleOfQuantifyingPriorYearMisstatementsCorrectedInCurrentYearFinancialStatementsTextBlock_9F39DF8003566331E19DD419D62C6D29" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfQuantifyingPriorYearMisstatementsCorrectedInCurrentYearFinancialStatementsTextBlock_9F39DF8003566331E19DD419D62C6D29" xlink:to="lab_us-gaap_ScheduleOfQuantifyingPriorYearMisstatementsCorrectedInCurrentYearFinancialStatementsTextBlock_9F39DF8003566331E19DD419D62C6D29" xlink:type="arc" />
    <link:label id="lab_us-gaap_EarningsPerShareAbstract_7F2429C1B619F6A527E7C011243BF8C1_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareAbstract_7F2429C1B619F6A527E7C011243BF8C1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Earnings Per Share [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="loc_us-gaap_EarningsPerShareAbstract_7F2429C1B619F6A527E7C011243BF8C1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerShareAbstract_7F2429C1B619F6A527E7C011243BF8C1" xlink:to="lab_us-gaap_EarningsPerShareAbstract_7F2429C1B619F6A527E7C011243BF8C1" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_8FA1B3831720AF5B0758C011243B0B7B_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_8FA1B3831720AF5B0758C011243B0B7B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_8FA1B3831720AF5B0758C011243B0B7B_label_en-US" xlink:label="lab_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_8FA1B3831720AF5B0758C011243B0B7B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_8FA1B3831720AF5B0758C011243B0B7B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_8FA1B3831720AF5B0758C011243B0B7B" xlink:to="lab_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_8FA1B3831720AF5B0758C011243B0B7B" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementClassOfStockAxis_08B1AFCB7AAE490D0586C011243C5E93_terseLabel_en-US" xlink:label="lab_us-gaap_StatementClassOfStockAxis_08B1AFCB7AAE490D0586C011243C5E93" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Class of Stock [Axis]</link:label>
    <link:label id="lab_us-gaap_StatementClassOfStockAxis_08B1AFCB7AAE490D0586C011243C5E93_label_en-US" xlink:label="lab_us-gaap_StatementClassOfStockAxis_08B1AFCB7AAE490D0586C011243C5E93" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Class of Stock [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="loc_us-gaap_StatementClassOfStockAxis_08B1AFCB7AAE490D0586C011243C5E93" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementClassOfStockAxis_08B1AFCB7AAE490D0586C011243C5E93" xlink:to="lab_us-gaap_StatementClassOfStockAxis_08B1AFCB7AAE490D0586C011243C5E93" xlink:type="arc" />
    <link:label id="lab_us-gaap_ClassOfStockDomain_1F46D68FD834F713D1B2C011243CA249_terseLabel_en-US" xlink:label="lab_us-gaap_ClassOfStockDomain_1F46D68FD834F713D1B2C011243CA249" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Class of Stock [Domain]</link:label>
    <link:label id="lab_us-gaap_ClassOfStockDomain_1F46D68FD834F713D1B2C011243CA249_label_en-US" xlink:label="lab_us-gaap_ClassOfStockDomain_1F46D68FD834F713D1B2C011243CA249" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Class of Stock [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_1F46D68FD834F713D1B2C011243CA249" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ClassOfStockDomain_1F46D68FD834F713D1B2C011243CA249" xlink:to="lab_us-gaap_ClassOfStockDomain_1F46D68FD834F713D1B2C011243CA249" xlink:type="arc" />
    <link:label id="lab_mdca_Series4ConvertiblePreferredStockMember_4CFE3CF3644B9682913DC011243C1A5C_terseLabel_en-US" xlink:label="lab_mdca_Series4ConvertiblePreferredStockMember_4CFE3CF3644B9682913DC011243C1A5C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Series 4 Convertible Preferred Stock</link:label>
    <link:label id="lab_mdca_Series4ConvertiblePreferredStockMember_4CFE3CF3644B9682913DC011243C1A5C_label_en-US" xlink:label="lab_mdca_Series4ConvertiblePreferredStockMember_4CFE3CF3644B9682913DC011243C1A5C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Series 4 Convertible Preferred Stock [Member]</link:label>
    <link:label id="lab_mdca_Series4ConvertiblePreferredStockMember_4CFE3CF3644B9682913DC011243C1A5C_documentation_en-US" xlink:label="lab_mdca_Series4ConvertiblePreferredStockMember_4CFE3CF3644B9682913DC011243C1A5C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Series 4 Convertible Preferred Stock [Member]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_Series4ConvertiblePreferredStockMember" xlink:label="loc_mdca_Series4ConvertiblePreferredStockMember_4CFE3CF3644B9682913DC011243C1A5C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_Series4ConvertiblePreferredStockMember_4CFE3CF3644B9682913DC011243C1A5C" xlink:to="lab_mdca_Series4ConvertiblePreferredStockMember_4CFE3CF3644B9682913DC011243C1A5C" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementEquityComponentsAxis_556EA886BE79D7B6A80FC011243D0CBA_terseLabel_en-US" xlink:label="lab_us-gaap_StatementEquityComponentsAxis_556EA886BE79D7B6A80FC011243D0CBA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity Components [Axis]</link:label>
    <link:label id="lab_us-gaap_StatementEquityComponentsAxis_556EA886BE79D7B6A80FC011243D0CBA_label_en-US" xlink:label="lab_us-gaap_StatementEquityComponentsAxis_556EA886BE79D7B6A80FC011243D0CBA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Components [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_556EA886BE79D7B6A80FC011243D0CBA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_556EA886BE79D7B6A80FC011243D0CBA" xlink:to="lab_us-gaap_StatementEquityComponentsAxis_556EA886BE79D7B6A80FC011243D0CBA" xlink:type="arc" />
    <link:label id="lab_us-gaap_EquityComponentDomain_ABAE818D3EE5C16CDD17C011243D39F8_terseLabel_en-US" xlink:label="lab_us-gaap_EquityComponentDomain_ABAE818D3EE5C16CDD17C011243D39F8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity Component [Domain]</link:label>
    <link:label id="lab_us-gaap_EquityComponentDomain_ABAE818D3EE5C16CDD17C011243D39F8_label_en-US" xlink:label="lab_us-gaap_EquityComponentDomain_ABAE818D3EE5C16CDD17C011243D39F8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Component [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_ABAE818D3EE5C16CDD17C011243D39F8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EquityComponentDomain_ABAE818D3EE5C16CDD17C011243D39F8" xlink:to="lab_us-gaap_EquityComponentDomain_ABAE818D3EE5C16CDD17C011243D39F8" xlink:type="arc" />
    <link:label id="lab_us-gaap_PreferredStockMember_9B62D60FEA635E48B946C011243D84A9_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockMember_9B62D60FEA635E48B946C011243D84A9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Convertible Preferred Stock</link:label>
    <link:label id="lab_us-gaap_PreferredStockMember_9B62D60FEA635E48B946C011243D84A9_label_en-US" xlink:label="lab_us-gaap_PreferredStockMember_9B62D60FEA635E48B946C011243D84A9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Preferred Stock [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockMember" xlink:label="loc_us-gaap_PreferredStockMember_9B62D60FEA635E48B946C011243D84A9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PreferredStockMember_9B62D60FEA635E48B946C011243D84A9" xlink:to="lab_us-gaap_PreferredStockMember_9B62D60FEA635E48B946C011243D84A9" xlink:type="arc" />
    <link:label id="lab_us-gaap_AwardTypeAxis_C6858EAEF98A4E6014CBC011243D6DCB_terseLabel_en-US" xlink:label="lab_us-gaap_AwardTypeAxis_C6858EAEF98A4E6014CBC011243D6DCB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Award Type [Axis]</link:label>
    <link:label id="lab_us-gaap_AwardTypeAxis_C6858EAEF98A4E6014CBC011243D6DCB_label_en-US" xlink:label="lab_us-gaap_AwardTypeAxis_C6858EAEF98A4E6014CBC011243D6DCB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Award Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_C6858EAEF98A4E6014CBC011243D6DCB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AwardTypeAxis_C6858EAEF98A4E6014CBC011243D6DCB" xlink:to="lab_us-gaap_AwardTypeAxis_C6858EAEF98A4E6014CBC011243D6DCB" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8FEB425A726E3E4F6975C011243D07FA_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8FEB425A726E3E4F6975C011243D07FA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Award Type [Domain]</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8FEB425A726E3E4F6975C011243D07FA_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8FEB425A726E3E4F6975C011243D07FA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Award Type [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8FEB425A726E3E4F6975C011243D07FA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8FEB425A726E3E4F6975C011243D07FA" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8FEB425A726E3E4F6975C011243D07FA" xlink:type="arc" />
    <link:label id="lab_mdca_ContingentRestrictedStockUnitsRSUsMember_B50CC7A27E0288B4FA35C011243EA5D3_terseLabel_en-US" xlink:label="lab_mdca_ContingentRestrictedStockUnitsRSUsMember_B50CC7A27E0288B4FA35C011243EA5D3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Contingent Restricted Stock Units (RSUs)</link:label>
    <link:label id="lab_mdca_ContingentRestrictedStockUnitsRSUsMember_B50CC7A27E0288B4FA35C011243EA5D3_label_en-US" xlink:label="lab_mdca_ContingentRestrictedStockUnitsRSUsMember_B50CC7A27E0288B4FA35C011243EA5D3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contingent Restricted Stock Units (RSUs) [Member]</link:label>
    <link:label id="lab_mdca_ContingentRestrictedStockUnitsRSUsMember_B50CC7A27E0288B4FA35C011243EA5D3_documentation_en-US" xlink:label="lab_mdca_ContingentRestrictedStockUnitsRSUsMember_B50CC7A27E0288B4FA35C011243EA5D3" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Contingent Restricted Stock Units (RSUs) [Member]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_ContingentRestrictedStockUnitsRSUsMember" xlink:label="loc_mdca_ContingentRestrictedStockUnitsRSUsMember_B50CC7A27E0288B4FA35C011243EA5D3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_ContingentRestrictedStockUnitsRSUsMember_B50CC7A27E0288B4FA35C011243EA5D3" xlink:to="lab_mdca_ContingentRestrictedStockUnitsRSUsMember_B50CC7A27E0288B4FA35C011243EA5D3" xlink:type="arc" />
    <link:label id="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_B727A6DA41482C9944E6C011243EEFFA_terseLabel_en-US" xlink:label="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_B727A6DA41482C9944E6C011243EEFFA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]</link:label>
    <link:label id="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_B727A6DA41482C9944E6C011243EEFFA_label_en-US" xlink:label="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_B727A6DA41482C9944E6C011243EEFFA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_B727A6DA41482C9944E6C011243EEFFA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_B727A6DA41482C9944E6C011243EEFFA" xlink:to="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_B727A6DA41482C9944E6C011243EEFFA" xlink:type="arc" />
    <link:label id="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_01A3D93FE89A29349086C011243EF011_verboseLabel_en-US" xlink:label="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_01A3D93FE89A29349086C011243EF011" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Antidilutive securities excluded from computation of earnings per share (shares)</link:label>
    <link:label id="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_01A3D93FE89A29349086C011243EF011_label_en-US" xlink:label="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_01A3D93FE89A29349086C011243EF011" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_01A3D93FE89A29349086C011243EF011" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_01A3D93FE89A29349086C011243EF011" xlink:to="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_01A3D93FE89A29349086C011243EF011" xlink:type="arc" />
    <link:label id="lab_us-gaap_SharesOutstanding_5A44F6953EC6C9F02A8EC011243FB6FE_terseLabel_en-US" xlink:label="lab_us-gaap_SharesOutstanding_5A44F6953EC6C9F02A8EC011243FB6FE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Shares outstanding (shares)</link:label>
    <link:label id="lab_us-gaap_SharesOutstanding_5A44F6953EC6C9F02A8EC011243FB6FE_label_en-US" xlink:label="lab_us-gaap_SharesOutstanding_5A44F6953EC6C9F02A8EC011243FB6FE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Shares, Outstanding</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharesOutstanding" xlink:label="loc_us-gaap_SharesOutstanding_5A44F6953EC6C9F02A8EC011243FB6FE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharesOutstanding_5A44F6953EC6C9F02A8EC011243FB6FE" xlink:to="lab_us-gaap_SharesOutstanding_5A44F6953EC6C9F02A8EC011243FB6FE" xlink:type="arc" />
    <link:label id="lab_us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion_9996B76DBD52B115B601C011243F4B4D_terseLabel_en-US" xlink:label="lab_us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion_9996B76DBD52B115B601C011243F4B4D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Convertible preferred stock, common shares issuable upon conversion (shares)</link:label>
    <link:label id="lab_us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion_9996B76DBD52B115B601C011243F4B4D_label_en-US" xlink:label="lab_us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion_9996B76DBD52B115B601C011243F4B4D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Convertible Preferred Stock, Shares Issued upon Conversion</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion" xlink:label="loc_us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion_9996B76DBD52B115B601C011243F4B4D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion_9996B76DBD52B115B601C011243F4B4D" xlink:to="lab_us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion_9996B76DBD52B115B601C011243F4B4D" xlink:type="arc" />
    <link:label id="lab_us-gaap_AdditionalFinancialInformationDisclosureTextBlock_9D1C72E41188C33670A8C01123B3F60F_terseLabel_en-US" xlink:label="lab_us-gaap_AdditionalFinancialInformationDisclosureTextBlock_9D1C72E41188C33670A8C01123B3F60F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Supplemental Information</link:label>
    <link:label id="lab_us-gaap_AdditionalFinancialInformationDisclosureTextBlock_9D1C72E41188C33670A8C01123B3F60F_label_en-US" xlink:label="lab_us-gaap_AdditionalFinancialInformationDisclosureTextBlock_9D1C72E41188C33670A8C01123B3F60F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Additional Financial Information Disclosure [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdditionalFinancialInformationDisclosureTextBlock" xlink:label="loc_us-gaap_AdditionalFinancialInformationDisclosureTextBlock_9D1C72E41188C33670A8C01123B3F60F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdditionalFinancialInformationDisclosureTextBlock_9D1C72E41188C33670A8C01123B3F60F" xlink:to="lab_us-gaap_AdditionalFinancialInformationDisclosureTextBlock_9D1C72E41188C33670A8C01123B3F60F" xlink:type="arc" />
    <link:label id="lab_us-gaap_NoncontrollingInterestAbstract_B6B246C3C598D2B691ADC41C1B90F042_label_en-US" xlink:label="lab_us-gaap_NoncontrollingInterestAbstract_B6B246C3C598D2B691ADC41C1B90F042" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Noncontrolling Interest [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NoncontrollingInterestAbstract" xlink:label="loc_us-gaap_NoncontrollingInterestAbstract_B6B246C3C598D2B691ADC41C1B90F042" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NoncontrollingInterestAbstract_B6B246C3C598D2B691ADC41C1B90F042" xlink:to="lab_us-gaap_NoncontrollingInterestAbstract_B6B246C3C598D2B691ADC41C1B90F042" xlink:type="arc" />
    <link:label id="lab_us-gaap_RedeemableNoncontrollingInterestEquityFairValue_8571EE6F8245AC4C928BC41C1B9000FC_periodStartLabel_en-US" xlink:label="lab_us-gaap_RedeemableNoncontrollingInterestEquityFairValue_8571EE6F8245AC4C928BC41C1B9000FC" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Beginning Balance</link:label>
    <link:label id="lab_us-gaap_RedeemableNoncontrollingInterestEquityFairValue_8571EE6F8245AC4C928BC41C1B9000FC_label_en-US" xlink:label="lab_us-gaap_RedeemableNoncontrollingInterestEquityFairValue_8571EE6F8245AC4C928BC41C1B9000FC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Redeemable Noncontrolling Interest, Equity, Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RedeemableNoncontrollingInterestEquityFairValue" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestEquityFairValue_8571EE6F8245AC4C928BC41C1B9000FC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestEquityFairValue_8571EE6F8245AC4C928BC41C1B9000FC" xlink:to="lab_us-gaap_RedeemableNoncontrollingInterestEquityFairValue_8571EE6F8245AC4C928BC41C1B9000FC" xlink:type="arc" />
    <link:label id="lab_mdca_Redeemablenoncontrollinginterestredemptionsvalue_E53DBDEFCEA0A7E18992C41C1B91655E_terseLabel_en-US" xlink:label="lab_mdca_Redeemablenoncontrollinginterestredemptionsvalue_E53DBDEFCEA0A7E18992C41C1B91655E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Redemptions</link:label>
    <link:label id="lab_mdca_Redeemablenoncontrollinginterestredemptionsvalue_E53DBDEFCEA0A7E18992C41C1B91655E_label_en-US" xlink:label="lab_mdca_Redeemablenoncontrollinginterestredemptionsvalue_E53DBDEFCEA0A7E18992C41C1B91655E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Redeemable noncontrolling interest, redemptions, value</link:label>
    <link:label id="lab_mdca_Redeemablenoncontrollinginterestredemptionsvalue_E53DBDEFCEA0A7E18992C41C1B91655E_documentation_en-US" xlink:label="lab_mdca_Redeemablenoncontrollinginterestredemptionsvalue_E53DBDEFCEA0A7E18992C41C1B91655E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Redeemable noncontrolling interest, redemptions, value</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_Redeemablenoncontrollinginterestredemptionsvalue" xlink:label="loc_mdca_Redeemablenoncontrollinginterestredemptionsvalue_E53DBDEFCEA0A7E18992C41C1B91655E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_Redeemablenoncontrollinginterestredemptionsvalue_E53DBDEFCEA0A7E18992C41C1B91655E" xlink:to="lab_mdca_Redeemablenoncontrollinginterestredemptionsvalue_E53DBDEFCEA0A7E18992C41C1B91655E" xlink:type="arc" />
    <link:label id="lab_us-gaap_NoncontrollingInterestIncreaseFromBusinessCombination_5111F07B55512FC15672C41C1B9175F2_terseLabel_en-US" xlink:label="lab_us-gaap_NoncontrollingInterestIncreaseFromBusinessCombination_5111F07B55512FC15672C41C1B9175F2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Granted</link:label>
    <link:label id="lab_us-gaap_NoncontrollingInterestIncreaseFromBusinessCombination_5111F07B55512FC15672C41C1B9175F2_label_en-US" xlink:label="lab_us-gaap_NoncontrollingInterestIncreaseFromBusinessCombination_5111F07B55512FC15672C41C1B9175F2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Noncontrolling Interest, Increase from Business Combination</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NoncontrollingInterestIncreaseFromBusinessCombination" xlink:label="loc_us-gaap_NoncontrollingInterestIncreaseFromBusinessCombination_5111F07B55512FC15672C41C1B9175F2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NoncontrollingInterestIncreaseFromBusinessCombination_5111F07B55512FC15672C41C1B9175F2" xlink:to="lab_us-gaap_NoncontrollingInterestIncreaseFromBusinessCombination_5111F07B55512FC15672C41C1B9175F2" xlink:type="arc" />
    <link:label id="lab_mdca_Redeemablenoncontrollinginterestchangesinredemptionvalue_F480380E7E2AAE93C635C41C1B91A6B2_terseLabel_en-US" xlink:label="lab_mdca_Redeemablenoncontrollinginterestchangesinredemptionvalue_F480380E7E2AAE93C635C41C1B91A6B2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Changes in redemption value</link:label>
    <link:label id="lab_mdca_Redeemablenoncontrollinginterestchangesinredemptionvalue_F480380E7E2AAE93C635C41C1B91A6B2_label_en-US" xlink:label="lab_mdca_Redeemablenoncontrollinginterestchangesinredemptionvalue_F480380E7E2AAE93C635C41C1B91A6B2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Redeemable noncontrolling interest, changes in redemption value</link:label>
    <link:label id="lab_mdca_Redeemablenoncontrollinginterestchangesinredemptionvalue_F480380E7E2AAE93C635C41C1B91A6B2_documentation_en-US" xlink:label="lab_mdca_Redeemablenoncontrollinginterestchangesinredemptionvalue_F480380E7E2AAE93C635C41C1B91A6B2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Redeemable noncontrolling interest, changes in redemption value</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_Redeemablenoncontrollinginterestchangesinredemptionvalue" xlink:label="loc_mdca_Redeemablenoncontrollinginterestchangesinredemptionvalue_F480380E7E2AAE93C635C41C1B91A6B2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_Redeemablenoncontrollinginterestchangesinredemptionvalue_F480380E7E2AAE93C635C41C1B91A6B2" xlink:to="lab_mdca_Redeemablenoncontrollinginterestchangesinredemptionvalue_F480380E7E2AAE93C635C41C1B91A6B2" xlink:type="arc" />
    <link:label id="lab_mdca_RedeemableNoncontrollingInterestCurrencyAdjustments_4E4F9C5ACD52814B9121C41C1B917495_terseLabel_en-US" xlink:label="lab_mdca_RedeemableNoncontrollingInterestCurrencyAdjustments_4E4F9C5ACD52814B9121C41C1B917495" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Currency translation adjustments</link:label>
    <link:label id="lab_mdca_RedeemableNoncontrollingInterestCurrencyAdjustments_4E4F9C5ACD52814B9121C41C1B917495_label_en-US" xlink:label="lab_mdca_RedeemableNoncontrollingInterestCurrencyAdjustments_4E4F9C5ACD52814B9121C41C1B917495" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Redeemable Noncontrolling Interest Currency Adjustments</link:label>
    <link:label id="lab_mdca_RedeemableNoncontrollingInterestCurrencyAdjustments_4E4F9C5ACD52814B9121C41C1B917495_documentation_en-US" xlink:label="lab_mdca_RedeemableNoncontrollingInterestCurrencyAdjustments_4E4F9C5ACD52814B9121C41C1B917495" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Adjustments to redeemable noncontrolling interest resulting from foreign currency translation adjustments.</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_RedeemableNoncontrollingInterestCurrencyAdjustments" xlink:label="loc_mdca_RedeemableNoncontrollingInterestCurrencyAdjustments_4E4F9C5ACD52814B9121C41C1B917495" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_RedeemableNoncontrollingInterestCurrencyAdjustments_4E4F9C5ACD52814B9121C41C1B917495" xlink:to="lab_mdca_RedeemableNoncontrollingInterestCurrencyAdjustments_4E4F9C5ACD52814B9121C41C1B917495" xlink:type="arc" />
    <link:label id="lab_mdca_NoncontrollingInterestIncreasefromOther_C903F7AF48D25EDE457BC41C1B9247B9_terseLabel_en-US" xlink:label="lab_mdca_NoncontrollingInterestIncreasefromOther_C903F7AF48D25EDE457BC41C1B9247B9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other</link:label>
    <link:label id="lab_mdca_NoncontrollingInterestIncreasefromOther_C903F7AF48D25EDE457BC41C1B9247B9_label_en-US" xlink:label="lab_mdca_NoncontrollingInterestIncreasefromOther_C903F7AF48D25EDE457BC41C1B9247B9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Noncontrolling Interest, Increase from Other</link:label>
    <link:label id="lab_mdca_NoncontrollingInterestIncreasefromOther_C903F7AF48D25EDE457BC41C1B9247B9_documentation_en-US" xlink:label="lab_mdca_NoncontrollingInterestIncreasefromOther_C903F7AF48D25EDE457BC41C1B9247B9" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Noncontrolling Interest, Increase from Other</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_NoncontrollingInterestIncreasefromOther" xlink:label="loc_mdca_NoncontrollingInterestIncreasefromOther_C903F7AF48D25EDE457BC41C1B9247B9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_NoncontrollingInterestIncreasefromOther_C903F7AF48D25EDE457BC41C1B9247B9" xlink:to="lab_mdca_NoncontrollingInterestIncreasefromOther_C903F7AF48D25EDE457BC41C1B9247B9" xlink:type="arc" />
    <link:label id="lab_us-gaap_RedeemableNoncontrollingInterestEquityFairValue_2226333E0FEF259F0CEFC41C1B921768_periodEndLabel_en-US" xlink:label="lab_us-gaap_RedeemableNoncontrollingInterestEquityFairValue_2226333E0FEF259F0CEFC41C1B921768" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Ending Balance</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RedeemableNoncontrollingInterestEquityFairValue" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestEquityFairValue_2226333E0FEF259F0CEFC41C1B921768" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestEquityFairValue_2226333E0FEF259F0CEFC41C1B921768" xlink:to="lab_us-gaap_RedeemableNoncontrollingInterestEquityFairValue_2226333E0FEF259F0CEFC41C1B921768" xlink:type="arc" />
    <link:label id="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_BCF4063FCBD63477F3C5C0112486CC00_verboseLabel_en-US" xlink:label="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_BCF4063FCBD63477F3C5C0112486CC00" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Basis of Presentation and Recent Developments</link:label>
    <link:label id="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_BCF4063FCBD63477F3C5C0112486CC00_label_en-US" xlink:label="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_BCF4063FCBD63477F3C5C0112486CC00" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock" xlink:label="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_BCF4063FCBD63477F3C5C0112486CC00" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_BCF4063FCBD63477F3C5C0112486CC00" xlink:to="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_BCF4063FCBD63477F3C5C0112486CC00" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessCombinationsAbstract_700491677B5F652ABFBBC011247A9418_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationsAbstract_700491677B5F652ABFBBC011247A9418" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combinations [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationsAbstract" xlink:label="loc_us-gaap_BusinessCombinationsAbstract_700491677B5F652ABFBBC011247A9418" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessCombinationsAbstract_700491677B5F652ABFBBC011247A9418" xlink:to="lab_us-gaap_BusinessCombinationsAbstract_700491677B5F652ABFBBC011247A9418" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessCombinationDisclosureTextBlock_68859270BA8E64692C1EC011247BCA79_verboseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationDisclosureTextBlock_68859270BA8E64692C1EC011247BCA79" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Acquisitions and Dispositions</link:label>
    <link:label id="lab_us-gaap_BusinessCombinationDisclosureTextBlock_68859270BA8E64692C1EC011247BCA79_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationDisclosureTextBlock_68859270BA8E64692C1EC011247BCA79" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination Disclosure [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationDisclosureTextBlock" xlink:label="loc_us-gaap_BusinessCombinationDisclosureTextBlock_68859270BA8E64692C1EC011247BCA79" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessCombinationDisclosureTextBlock_68859270BA8E64692C1EC011247BCA79" xlink:to="lab_us-gaap_BusinessCombinationDisclosureTextBlock_68859270BA8E64692C1EC011247BCA79" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueDisclosuresAbstract_9DAAC51122F304597013C01123C1F4A5_label_en-US" xlink:label="lab_us-gaap_FairValueDisclosuresAbstract_9DAAC51122F304597013C01123C1F4A5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Disclosures [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_9DAAC51122F304597013C01123C1F4A5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_9DAAC51122F304597013C01123C1F4A5" xlink:to="lab_us-gaap_FairValueDisclosuresAbstract_9DAAC51122F304597013C01123C1F4A5" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueDisclosuresTextBlock_ED3F223A47FED2CCA482C01123C1CACE_verboseLabel_en-US" xlink:label="lab_us-gaap_FairValueDisclosuresTextBlock_ED3F223A47FED2CCA482C01123C1CACE" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Measurements</link:label>
    <link:label id="lab_us-gaap_FairValueDisclosuresTextBlock_ED3F223A47FED2CCA482C01123C1CACE_label_en-US" xlink:label="lab_us-gaap_FairValueDisclosuresTextBlock_ED3F223A47FED2CCA482C01123C1CACE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Disclosures [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueDisclosuresTextBlock" xlink:label="loc_us-gaap_FairValueDisclosuresTextBlock_ED3F223A47FED2CCA482C01123C1CACE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueDisclosuresTextBlock_ED3F223A47FED2CCA482C01123C1CACE" xlink:to="lab_us-gaap_FairValueDisclosuresTextBlock_ED3F223A47FED2CCA482C01123C1CACE" xlink:type="arc" />
    <link:label id="lab_us-gaap_LeasesAbstract_C64CDF05760D48BA237EC0112425E557_label_en-US" xlink:label="lab_us-gaap_LeasesAbstract_C64CDF05760D48BA237EC0112425E557" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Leases [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LeasesAbstract" xlink:label="loc_us-gaap_LeasesAbstract_C64CDF05760D48BA237EC0112425E557" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LeasesAbstract_C64CDF05760D48BA237EC0112425E557" xlink:to="lab_us-gaap_LeasesAbstract_C64CDF05760D48BA237EC0112425E557" xlink:type="arc" />
    <link:label id="lab_mdca_LeasePayments_ECB88E03408C28EBF785C0112425E3E5_terseLabel_en-US" xlink:label="lab_mdca_LeasePayments_ECB88E03408C28EBF785C0112425E3E5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Lease payments</link:label>
    <link:label id="lab_mdca_LeasePayments_ECB88E03408C28EBF785C0112425E3E5_label_en-US" xlink:label="lab_mdca_LeasePayments_ECB88E03408C28EBF785C0112425E3E5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lease Payments</link:label>
    <link:label id="lab_mdca_LeasePayments_ECB88E03408C28EBF785C0112425E3E5_documentation_en-US" xlink:label="lab_mdca_LeasePayments_ECB88E03408C28EBF785C0112425E3E5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Lease Payments</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_LeasePayments" xlink:label="loc_mdca_LeasePayments_ECB88E03408C28EBF785C0112425E3E5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_LeasePayments_ECB88E03408C28EBF785C0112425E3E5" xlink:to="lab_mdca_LeasePayments_ECB88E03408C28EBF785C0112425E3E5" xlink:type="arc" />
    <link:label id="lab_mdca_LesseeOperatingLeaseLeaseNotyetCommencedLiability_5F539CC194D4D63E48C1C0112425FDD2_terseLabel_en-US" xlink:label="lab_mdca_LesseeOperatingLeaseLeaseNotyetCommencedLiability_5F539CC194D4D63E48C1C0112425FDD2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Leases not yet commenced, liability</link:label>
    <link:label id="lab_mdca_LesseeOperatingLeaseLeaseNotyetCommencedLiability_5F539CC194D4D63E48C1C0112425FDD2_label_en-US" xlink:label="lab_mdca_LesseeOperatingLeaseLeaseNotyetCommencedLiability_5F539CC194D4D63E48C1C0112425FDD2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lessee, Operating Lease, Lease Not yet Commenced, Liability</link:label>
    <link:label id="lab_mdca_LesseeOperatingLeaseLeaseNotyetCommencedLiability_5F539CC194D4D63E48C1C0112425FDD2_documentation_en-US" xlink:label="lab_mdca_LesseeOperatingLeaseLeaseNotyetCommencedLiability_5F539CC194D4D63E48C1C0112425FDD2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Lessee, Operating Lease, Lease Not yet Commenced, Liability</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_LesseeOperatingLeaseLeaseNotyetCommencedLiability" xlink:label="loc_mdca_LesseeOperatingLeaseLeaseNotyetCommencedLiability_5F539CC194D4D63E48C1C0112425FDD2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_LesseeOperatingLeaseLeaseNotyetCommencedLiability_5F539CC194D4D63E48C1C0112425FDD2" xlink:to="lab_mdca_LesseeOperatingLeaseLeaseNotyetCommencedLiability_5F539CC194D4D63E48C1C0112425FDD2" xlink:type="arc" />
    <link:label id="lab_mdca_ImpairmentofRightOfUseAsset_3C0AAD549111FC9334AAC0112425B1F7_terseLabel_en-US" xlink:label="lab_mdca_ImpairmentofRightOfUseAsset_3C0AAD549111FC9334AAC0112425B1F7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Impairment of right-of-use asset</link:label>
    <link:label id="lab_mdca_ImpairmentofRightOfUseAsset_3C0AAD549111FC9334AAC0112425B1F7_label_en-US" xlink:label="lab_mdca_ImpairmentofRightOfUseAsset_3C0AAD549111FC9334AAC0112425B1F7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Impairment of Right-Of-Use Asset</link:label>
    <link:label id="lab_mdca_ImpairmentofRightOfUseAsset_3C0AAD549111FC9334AAC0112425B1F7_documentation_en-US" xlink:label="lab_mdca_ImpairmentofRightOfUseAsset_3C0AAD549111FC9334AAC0112425B1F7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Impairment of Right-Of-Use Asset</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_ImpairmentofRightOfUseAsset" xlink:label="loc_mdca_ImpairmentofRightOfUseAsset_3C0AAD549111FC9334AAC0112425B1F7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_ImpairmentofRightOfUseAsset_3C0AAD549111FC9334AAC0112425B1F7" xlink:to="lab_mdca_ImpairmentofRightOfUseAsset_3C0AAD549111FC9334AAC0112425B1F7" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfQuantifyingPriorYearMisstatementCorrectedInCurrentYearFinancialStatementsTable_ACB0205C600085D25726D428B1F0C0A7_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfQuantifyingPriorYearMisstatementCorrectedInCurrentYearFinancialStatementsTable_ACB0205C600085D25726D428B1F0C0A7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Quantifying Prior Year Misstatement Corrected in Current Year Financial Statements [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfQuantifyingPriorYearMisstatementCorrectedInCurrentYearFinancialStatementsTable_ACB0205C600085D25726D428B1F0C0A7_label_en-US" xlink:label="lab_us-gaap_ScheduleOfQuantifyingPriorYearMisstatementCorrectedInCurrentYearFinancialStatementsTable_ACB0205C600085D25726D428B1F0C0A7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Quantifying Prior Year Misstatement Corrected in Current Year Financial Statements [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfQuantifyingPriorYearMisstatementCorrectedInCurrentYearFinancialStatementsTable" xlink:label="loc_us-gaap_ScheduleOfQuantifyingPriorYearMisstatementCorrectedInCurrentYearFinancialStatementsTable_ACB0205C600085D25726D428B1F0C0A7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfQuantifyingPriorYearMisstatementCorrectedInCurrentYearFinancialStatementsTable_ACB0205C600085D25726D428B1F0C0A7" xlink:to="lab_us-gaap_ScheduleOfQuantifyingPriorYearMisstatementCorrectedInCurrentYearFinancialStatementsTable_ACB0205C600085D25726D428B1F0C0A7" xlink:type="arc" />
    <link:label id="lab_srt_RestatementAxis_3E2FAE6FA7DF2946DFECD43122741419_terseLabel_en-US" xlink:label="lab_srt_RestatementAxis_3E2FAE6FA7DF2946DFECD43122741419" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Restatement [Axis]</link:label>
    <link:label id="lab_srt_RestatementAxis_3E2FAE6FA7DF2946DFECD43122741419_label_en-US" xlink:label="lab_srt_RestatementAxis_3E2FAE6FA7DF2946DFECD43122741419" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Restatement [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RestatementAxis" xlink:label="loc_srt_RestatementAxis_3E2FAE6FA7DF2946DFECD43122741419" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_RestatementAxis_3E2FAE6FA7DF2946DFECD43122741419" xlink:to="lab_srt_RestatementAxis_3E2FAE6FA7DF2946DFECD43122741419" xlink:type="arc" />
    <link:label id="lab_srt_RestatementDomain_BB0A63E497D5638AABC7D4312274951E_terseLabel_en-US" xlink:label="lab_srt_RestatementDomain_BB0A63E497D5638AABC7D4312274951E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Restatement [Domain]</link:label>
    <link:label id="lab_srt_RestatementDomain_BB0A63E497D5638AABC7D4312274951E_label_en-US" xlink:label="lab_srt_RestatementDomain_BB0A63E497D5638AABC7D4312274951E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Restatement [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RestatementDomain" xlink:label="loc_srt_RestatementDomain_BB0A63E497D5638AABC7D4312274951E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_RestatementDomain_BB0A63E497D5638AABC7D4312274951E" xlink:to="lab_srt_RestatementDomain_BB0A63E497D5638AABC7D4312274951E" xlink:type="arc" />
    <link:label id="lab_srt_ScenarioPreviouslyReportedMember_B29D36D0E30B8FA5D2B0D4317F0061EC_terseLabel_en-US" xlink:label="lab_srt_ScenarioPreviouslyReportedMember_B29D36D0E30B8FA5D2B0D4317F0061EC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Previously Reported</link:label>
    <link:label id="lab_srt_ScenarioPreviouslyReportedMember_B29D36D0E30B8FA5D2B0D4317F0061EC_label_en-US" xlink:label="lab_srt_ScenarioPreviouslyReportedMember_B29D36D0E30B8FA5D2B0D4317F0061EC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Previously Reported [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ScenarioPreviouslyReportedMember" xlink:label="loc_srt_ScenarioPreviouslyReportedMember_B29D36D0E30B8FA5D2B0D4317F0061EC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ScenarioPreviouslyReportedMember_B29D36D0E30B8FA5D2B0D4317F0061EC" xlink:to="lab_srt_ScenarioPreviouslyReportedMember_B29D36D0E30B8FA5D2B0D4317F0061EC" xlink:type="arc" />
    <link:label id="lab_srt_RestatementAdjustmentMember_994991D6319B089AF607D431A7535600_terseLabel_en-US" xlink:label="lab_srt_RestatementAdjustmentMember_994991D6319B089AF607D431A7535600" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Restatement Adjustment</link:label>
    <link:label id="lab_srt_RestatementAdjustmentMember_994991D6319B089AF607D431A7535600_label_en-US" xlink:label="lab_srt_RestatementAdjustmentMember_994991D6319B089AF607D431A7535600" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Restatement Adjustment [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RestatementAdjustmentMember" xlink:label="loc_srt_RestatementAdjustmentMember_994991D6319B089AF607D431A7535600" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_RestatementAdjustmentMember_994991D6319B089AF607D431A7535600" xlink:to="lab_srt_RestatementAdjustmentMember_994991D6319B089AF607D431A7535600" xlink:type="arc" />
    <link:label id="lab_us-gaap_QuantifyingMisstatementInCurrentYearFinancialStatementsLineItems_FCF5C03A56EEEE28A8B6D428B1F0FBAE_terseLabel_en-US" xlink:label="lab_us-gaap_QuantifyingMisstatementInCurrentYearFinancialStatementsLineItems_FCF5C03A56EEEE28A8B6D428B1F0FBAE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Quantifying Misstatement in Current Year Financial Statements [Line Items]</link:label>
    <link:label id="lab_us-gaap_QuantifyingMisstatementInCurrentYearFinancialStatementsLineItems_FCF5C03A56EEEE28A8B6D428B1F0FBAE_label_en-US" xlink:label="lab_us-gaap_QuantifyingMisstatementInCurrentYearFinancialStatementsLineItems_FCF5C03A56EEEE28A8B6D428B1F0FBAE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Quantifying Misstatement in Current Year Financial Statements [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_QuantifyingMisstatementInCurrentYearFinancialStatementsLineItems" xlink:label="loc_us-gaap_QuantifyingMisstatementInCurrentYearFinancialStatementsLineItems_FCF5C03A56EEEE28A8B6D428B1F0FBAE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_QuantifyingMisstatementInCurrentYearFinancialStatementsLineItems_FCF5C03A56EEEE28A8B6D428B1F0FBAE" xlink:to="lab_us-gaap_QuantifyingMisstatementInCurrentYearFinancialStatementsLineItems_FCF5C03A56EEEE28A8B6D428B1F0FBAE" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccountsReceivableNetCurrent_C10182CBB2468730D873D42C9E3ED1E8_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsReceivableNetCurrent_C10182CBB2468730D873D42C9E3ED1E8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accounts Receivable, after Allowance for Credit Loss, Current</link:label>
    <link:label id="lab_us-gaap_AccountsReceivableNetCurrent_C10182CBB2468730D873D42C9E3ED1E8_label_en-US" xlink:label="lab_us-gaap_AccountsReceivableNetCurrent_C10182CBB2468730D873D42C9E3ED1E8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accounts Receivable, after Allowance for Credit Loss, Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_C10182CBB2468730D873D42C9E3ED1E8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccountsReceivableNetCurrent_C10182CBB2468730D873D42C9E3ED1E8" xlink:to="lab_us-gaap_AccountsReceivableNetCurrent_C10182CBB2468730D873D42C9E3ED1E8" xlink:type="arc" />
    <link:label id="lab_us-gaap_Goodwill_EB3950E0436D4A6C4C7BD42DDAAAA4D8_terseLabel_en-US" xlink:label="lab_us-gaap_Goodwill_EB3950E0436D4A6C4C7BD42DDAAAA4D8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Goodwill</link:label>
    <link:label id="lab_us-gaap_Goodwill_EB3950E0436D4A6C4C7BD42DDAAAA4D8_label_en-US" xlink:label="lab_us-gaap_Goodwill_EB3950E0436D4A6C4C7BD42DDAAAA4D8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Goodwill</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_EB3950E0436D4A6C4C7BD42DDAAAA4D8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Goodwill_EB3950E0436D4A6C4C7BD42DDAAAA4D8" xlink:to="lab_us-gaap_Goodwill_EB3950E0436D4A6C4C7BD42DDAAAA4D8" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredIncomeTaxAssetsNet_7AC9246E36552AAB2F60D42E12FD66B3_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxAssetsNet_7AC9246E36552AAB2F60D42E12FD66B3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred tax assets</link:label>
    <link:label id="lab_us-gaap_DeferredIncomeTaxAssetsNet_7AC9246E36552AAB2F60D42E12FD66B3_label_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxAssetsNet_7AC9246E36552AAB2F60D42E12FD66B3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Income Tax Assets, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredIncomeTaxAssetsNet" xlink:label="loc_us-gaap_DeferredIncomeTaxAssetsNet_7AC9246E36552AAB2F60D42E12FD66B3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredIncomeTaxAssetsNet_7AC9246E36552AAB2F60D42E12FD66B3" xlink:to="lab_us-gaap_DeferredIncomeTaxAssetsNet_7AC9246E36552AAB2F60D42E12FD66B3" xlink:type="arc" />
    <link:label id="lab_us-gaap_Assets_569122E7F05D16AFE960D42E371775C5_terseLabel_en-US" xlink:label="lab_us-gaap_Assets_569122E7F05D16AFE960D42E371775C5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Assets</link:label>
    <link:label id="lab_us-gaap_Assets_569122E7F05D16AFE960D42E371775C5_label_en-US" xlink:label="lab_us-gaap_Assets_569122E7F05D16AFE960D42E371775C5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_569122E7F05D16AFE960D42E371775C5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Assets_569122E7F05D16AFE960D42E371775C5" xlink:to="lab_us-gaap_Assets_569122E7F05D16AFE960D42E371775C5" xlink:type="arc" />
    <link:label id="lab_mdca_AccruedExpensesAndOtherCurrentLiabilities_E0AFFFFD45D42AC6CE71D42E7A27A238_terseLabel_en-US" xlink:label="lab_mdca_AccruedExpensesAndOtherCurrentLiabilities_E0AFFFFD45D42AC6CE71D42E7A27A238" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accruals and other liabilities</link:label>
    <link:label id="lab_mdca_AccruedExpensesAndOtherCurrentLiabilities_E0AFFFFD45D42AC6CE71D42E7A27A238_label_en-US" xlink:label="lab_mdca_AccruedExpensesAndOtherCurrentLiabilities_E0AFFFFD45D42AC6CE71D42E7A27A238" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accrued Expenses and Other Current Liabilities</link:label>
    <link:label id="lab_mdca_AccruedExpensesAndOtherCurrentLiabilities_E0AFFFFD45D42AC6CE71D42E7A27A238_documentation_en-US" xlink:label="lab_mdca_AccruedExpensesAndOtherCurrentLiabilities_E0AFFFFD45D42AC6CE71D42E7A27A238" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Accrued expenses and other current liabilities</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_AccruedExpensesAndOtherCurrentLiabilities" xlink:label="loc_mdca_AccruedExpensesAndOtherCurrentLiabilities_E0AFFFFD45D42AC6CE71D42E7A27A238" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_AccruedExpensesAndOtherCurrentLiabilities_E0AFFFFD45D42AC6CE71D42E7A27A238" xlink:to="lab_mdca_AccruedExpensesAndOtherCurrentLiabilities_E0AFFFFD45D42AC6CE71D42E7A27A238" xlink:type="arc" />
    <link:label id="lab_us-gaap_Liabilities_C2D98499DEE110E9A647D42EA0C11DE9_terseLabel_en-US" xlink:label="lab_us-gaap_Liabilities_C2D98499DEE110E9A647D42EA0C11DE9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Liabilities</link:label>
    <link:label id="lab_us-gaap_Liabilities_C2D98499DEE110E9A647D42EA0C11DE9_label_en-US" xlink:label="lab_us-gaap_Liabilities_C2D98499DEE110E9A647D42EA0C11DE9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaap_Liabilities_C2D98499DEE110E9A647D42EA0C11DE9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Liabilities_C2D98499DEE110E9A647D42EA0C11DE9" xlink:to="lab_us-gaap_Liabilities_C2D98499DEE110E9A647D42EA0C11DE9" xlink:type="arc" />
    <link:label id="lab_us-gaap_RetainedEarningsAccumulatedDeficit_F1F019AB23059CA57222D42F2FE1C0DE_verboseLabel_en-US" xlink:label="lab_us-gaap_RetainedEarningsAccumulatedDeficit_F1F019AB23059CA57222D42F2FE1C0DE" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Accumulated deficit</link:label>
    <link:label id="lab_us-gaap_RetainedEarningsAccumulatedDeficit_F1F019AB23059CA57222D42F2FE1C0DE_label_en-US" xlink:label="lab_us-gaap_RetainedEarningsAccumulatedDeficit_F1F019AB23059CA57222D42F2FE1C0DE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Retained Earnings (Accumulated Deficit)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_F1F019AB23059CA57222D42F2FE1C0DE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RetainedEarningsAccumulatedDeficit_F1F019AB23059CA57222D42F2FE1C0DE" xlink:to="lab_us-gaap_RetainedEarningsAccumulatedDeficit_F1F019AB23059CA57222D42F2FE1C0DE" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_3DF04699C2D566B2576ED42F74494128_terseLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_3DF04699C2D566B2576ED42F74494128" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest</link:label>
    <link:label id="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_3DF04699C2D566B2576ED42F74494128_label_en-US" xlink:label="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_3DF04699C2D566B2576ED42F74494128" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_3DF04699C2D566B2576ED42F74494128" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_3DF04699C2D566B2576ED42F74494128" xlink:to="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_3DF04699C2D566B2576ED42F74494128" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquity_8DB53CCB10DEAFEED3B2D42FA6518DBD_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquity_8DB53CCB10DEAFEED3B2D42FA6518DBD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Liabilities and Equity</link:label>
    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquity_8DB53CCB10DEAFEED3B2D42FA6518DBD_label_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquity_8DB53CCB10DEAFEED3B2D42FA6518DBD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities and Equity</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_8DB53CCB10DEAFEED3B2D42FA6518DBD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_8DB53CCB10DEAFEED3B2D42FA6518DBD" xlink:to="lab_us-gaap_LiabilitiesAndStockholdersEquity_8DB53CCB10DEAFEED3B2D42FA6518DBD" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_ACA910E4C240EF78606BC06DF0F3CF5A_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_ACA910E4C240EF78606BC06DF0F3CF5A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Business Acquisitions, by Acquisition [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_ACA910E4C240EF78606BC06DF0F3CF5A_label_en-US" xlink:label="lab_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_ACA910E4C240EF78606BC06DF0F3CF5A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Business Acquisitions, by Acquisition [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_ACA910E4C240EF78606BC06DF0F3CF5A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_ACA910E4C240EF78606BC06DF0F3CF5A" xlink:to="lab_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_ACA910E4C240EF78606BC06DF0F3CF5A" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_D957C28373442C2145C7C06DF0F33AEC_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_D957C28373442C2145C7C06DF0F33AEC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Disposal Group Name [Axis]</link:label>
    <link:label id="lab_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_D957C28373442C2145C7C06DF0F33AEC_label_en-US" xlink:label="lab_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_D957C28373442C2145C7C06DF0F33AEC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disposal Group Name [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_D957C28373442C2145C7C06DF0F33AEC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_D957C28373442C2145C7C06DF0F33AEC" xlink:to="lab_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_D957C28373442C2145C7C06DF0F33AEC" xlink:type="arc" />
    <link:label id="lab_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_7935164FC2A3414B66BBC06DF0F45164_terseLabel_en-US" xlink:label="lab_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_7935164FC2A3414B66BBC06DF0F45164" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Disposal Group Name [Domain]</link:label>
    <link:label id="lab_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_7935164FC2A3414B66BBC06DF0F45164_label_en-US" xlink:label="lab_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_7935164FC2A3414B66BBC06DF0F45164" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disposal Group Name [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_7935164FC2A3414B66BBC06DF0F45164" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_7935164FC2A3414B66BBC06DF0F45164" xlink:to="lab_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_7935164FC2A3414B66BBC06DF0F45164" xlink:type="arc" />
    <link:label id="lab_mdca_SloaneandCompanyLLCMember_FE982B85953F64988AECC06DF0F4FC6D_terseLabel_en-US" xlink:label="lab_mdca_SloaneandCompanyLLCMember_FE982B85953F64988AECC06DF0F4FC6D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sloane and Company LLC [Member]</link:label>
    <link:label id="lab_mdca_SloaneandCompanyLLCMember_FE982B85953F64988AECC06DF0F4FC6D_label_en-US" xlink:label="lab_mdca_SloaneandCompanyLLCMember_FE982B85953F64988AECC06DF0F4FC6D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sloane and Company LLC [Member]</link:label>
    <link:label id="lab_mdca_SloaneandCompanyLLCMember_FE982B85953F64988AECC06DF0F4FC6D_documentation_en-US" xlink:label="lab_mdca_SloaneandCompanyLLCMember_FE982B85953F64988AECC06DF0F4FC6D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Sloane and Company LLC [Member]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_SloaneandCompanyLLCMember" xlink:label="loc_mdca_SloaneandCompanyLLCMember_FE982B85953F64988AECC06DF0F4FC6D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_SloaneandCompanyLLCMember_FE982B85953F64988AECC06DF0F4FC6D" xlink:to="lab_mdca_SloaneandCompanyLLCMember_FE982B85953F64988AECC06DF0F4FC6D" xlink:type="arc" />
    <link:label id="lab_mdca_KingsdalePartnersLpMember_CA0A1A90C9FF34FB6C85C06DF0F4C411_terseLabel_en-US" xlink:label="lab_mdca_KingsdalePartnersLpMember_CA0A1A90C9FF34FB6C85C06DF0F4C411" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Kingsdale Partners LP [Member]</link:label>
    <link:label id="lab_mdca_KingsdalePartnersLpMember_CA0A1A90C9FF34FB6C85C06DF0F4C411_label_en-US" xlink:label="lab_mdca_KingsdalePartnersLpMember_CA0A1A90C9FF34FB6C85C06DF0F4C411" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Kingsdale Partners LP [Member]</link:label>
    <link:label id="lab_mdca_KingsdalePartnersLpMember_CA0A1A90C9FF34FB6C85C06DF0F4C411_documentation_en-US" xlink:label="lab_mdca_KingsdalePartnersLpMember_CA0A1A90C9FF34FB6C85C06DF0F4C411" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US" />
    <link:loc xlink:href="mdca-20200630.xsd#mdca_KingsdalePartnersLpMember" xlink:label="loc_mdca_KingsdalePartnersLpMember_CA0A1A90C9FF34FB6C85C06DF0F4C411" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_KingsdalePartnersLpMember_CA0A1A90C9FF34FB6C85C06DF0F4C411" xlink:to="lab_mdca_KingsdalePartnersLpMember_CA0A1A90C9FF34FB6C85C06DF0F4C411" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommonStockMember_64986033F9D1A3FAAF07C06DF0F54928_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockMember_64986033F9D1A3FAAF07C06DF0F54928" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common Stock [Member]</link:label>
    <link:label id="lab_us-gaap_CommonStockMember_64986033F9D1A3FAAF07C06DF0F54928_label_en-US" xlink:label="lab_us-gaap_CommonStockMember_64986033F9D1A3FAAF07C06DF0F54928" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockMember" xlink:label="loc_us-gaap_CommonStockMember_64986033F9D1A3FAAF07C06DF0F54928" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockMember_64986033F9D1A3FAAF07C06DF0F54928" xlink:to="lab_us-gaap_CommonStockMember_64986033F9D1A3FAAF07C06DF0F54928" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessAcquisitionAxis_A0A2069747236A5296EEC06DF0F59554_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionAxis_A0A2069747236A5296EEC06DF0F59554" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Acquisition [Axis]</link:label>
    <link:label id="lab_us-gaap_BusinessAcquisitionAxis_A0A2069747236A5296EEC06DF0F59554_label_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionAxis_A0A2069747236A5296EEC06DF0F59554" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Acquisition [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_A0A2069747236A5296EEC06DF0F59554" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_A0A2069747236A5296EEC06DF0F59554" xlink:to="lab_us-gaap_BusinessAcquisitionAxis_A0A2069747236A5296EEC06DF0F59554" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessAcquisitionAcquireeDomain_6F32AEEC44D71ECF07BFC06DF0F511F2_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionAcquireeDomain_6F32AEEC44D71ECF07BFC06DF0F511F2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Acquisition, Acquiree [Domain]</link:label>
    <link:label id="lab_us-gaap_BusinessAcquisitionAcquireeDomain_6F32AEEC44D71ECF07BFC06DF0F511F2_label_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionAcquireeDomain_6F32AEEC44D71ECF07BFC06DF0F511F2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Acquisition, Acquiree [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_6F32AEEC44D71ECF07BFC06DF0F511F2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_6F32AEEC44D71ECF07BFC06DF0F511F2" xlink:to="lab_us-gaap_BusinessAcquisitionAcquireeDomain_6F32AEEC44D71ECF07BFC06DF0F511F2" xlink:type="arc" />
    <link:label id="lab_mdca_KWTGlobalMember_30A4B1216796D381C156C06DF0F578A3_terseLabel_en-US" xlink:label="lab_mdca_KWTGlobalMember_30A4B1216796D381C156C06DF0F578A3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">KWT Global [Member]</link:label>
    <link:label id="lab_mdca_KWTGlobalMember_30A4B1216796D381C156C06DF0F578A3_label_en-US" xlink:label="lab_mdca_KWTGlobalMember_30A4B1216796D381C156C06DF0F578A3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">KWT Global [Member]</link:label>
    <link:label id="lab_mdca_KWTGlobalMember_30A4B1216796D381C156C06DF0F578A3_documentation_en-US" xlink:label="lab_mdca_KWTGlobalMember_30A4B1216796D381C156C06DF0F578A3" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">KWT Global [Member]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_KWTGlobalMember" xlink:label="loc_mdca_KWTGlobalMember_30A4B1216796D381C156C06DF0F578A3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_KWTGlobalMember_30A4B1216796D381C156C06DF0F578A3" xlink:to="lab_mdca_KWTGlobalMember_30A4B1216796D381C156C06DF0F578A3" xlink:type="arc" />
    <link:label id="lab_mdca_LairdPartnersMember_9080B0D4FA93001895E2C06DF0F5840A_terseLabel_en-US" xlink:label="lab_mdca_LairdPartnersMember_9080B0D4FA93001895E2C06DF0F5840A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Laird - Partners [Member]</link:label>
    <link:label id="lab_mdca_LairdPartnersMember_9080B0D4FA93001895E2C06DF0F5840A_label_en-US" xlink:label="lab_mdca_LairdPartnersMember_9080B0D4FA93001895E2C06DF0F5840A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Laird - Partners [Member]</link:label>
    <link:label id="lab_mdca_LairdPartnersMember_9080B0D4FA93001895E2C06DF0F5840A_documentation_en-US" xlink:label="lab_mdca_LairdPartnersMember_9080B0D4FA93001895E2C06DF0F5840A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Laird - Partners [Member]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_LairdPartnersMember" xlink:label="loc_mdca_LairdPartnersMember_9080B0D4FA93001895E2C06DF0F5840A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_LairdPartnersMember_9080B0D4FA93001895E2C06DF0F5840A" xlink:to="lab_mdca_LairdPartnersMember_9080B0D4FA93001895E2C06DF0F5840A" xlink:type="arc" />
    <link:label id="lab_mdca_HunterPRLLCMember_2B4A8DB585080D124416C06DF0F5696B_terseLabel_en-US" xlink:label="lab_mdca_HunterPRLLCMember_2B4A8DB585080D124416C06DF0F5696B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Hunter PR LLC [Member]</link:label>
    <link:label id="lab_mdca_HunterPRLLCMember_2B4A8DB585080D124416C06DF0F5696B_label_en-US" xlink:label="lab_mdca_HunterPRLLCMember_2B4A8DB585080D124416C06DF0F5696B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Hunter PR LLC [Member]</link:label>
    <link:label id="lab_mdca_HunterPRLLCMember_2B4A8DB585080D124416C06DF0F5696B_documentation_en-US" xlink:label="lab_mdca_HunterPRLLCMember_2B4A8DB585080D124416C06DF0F5696B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Hunter PR LLC [Member]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_HunterPRLLCMember" xlink:label="loc_mdca_HunterPRLLCMember_2B4A8DB585080D124416C06DF0F5696B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_HunterPRLLCMember_2B4A8DB585080D124416C06DF0F5696B" xlink:to="lab_mdca_HunterPRLLCMember_2B4A8DB585080D124416C06DF0F5696B" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessAcquisitionLineItems_512F9A266FAACD898764C06DF0F53A9F_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionLineItems_512F9A266FAACD898764C06DF0F53A9F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Acquisition [Line Items]</link:label>
    <link:label id="lab_us-gaap_BusinessAcquisitionLineItems_512F9A266FAACD898764C06DF0F53A9F_label_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionLineItems_512F9A266FAACD898764C06DF0F53A9F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Acquisition [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_512F9A266FAACD898764C06DF0F53A9F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_512F9A266FAACD898764C06DF0F53A9F" xlink:to="lab_us-gaap_BusinessAcquisitionLineItems_512F9A266FAACD898764C06DF0F53A9F" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromDivestitureOfBusinesses_62152534FBE74F696310C06DF0F66379_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromDivestitureOfBusinesses_62152534FBE74F696310C06DF0F66379" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from Divestiture of Businesses</link:label>
    <link:label id="lab_us-gaap_ProceedsFromDivestitureOfBusinesses_62152534FBE74F696310C06DF0F66379_label_en-US" xlink:label="lab_us-gaap_ProceedsFromDivestitureOfBusinesses_62152534FBE74F696310C06DF0F66379" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Divestiture of Businesses</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromDivestitureOfBusinesses" xlink:label="loc_us-gaap_ProceedsFromDivestitureOfBusinesses_62152534FBE74F696310C06DF0F66379" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromDivestitureOfBusinesses_62152534FBE74F696310C06DF0F66379" xlink:to="lab_us-gaap_ProceedsFromDivestitureOfBusinesses_62152534FBE74F696310C06DF0F66379" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_F8ACE601CCD4E3641847C06DF0F71799_verboseLabel_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_F8ACE601CCD4E3641847C06DF0F71799" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Remaining ownership interest acquired (percent)</link:label>
    <link:label id="lab_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_F8ACE601CCD4E3641847C06DF0F71799_label_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_F8ACE601CCD4E3641847C06DF0F71799" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Acquisition, Percentage of Voting Interests Acquired</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired" xlink:label="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_F8ACE601CCD4E3641847C06DF0F71799" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_F8ACE601CCD4E3641847C06DF0F71799" xlink:to="lab_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_F8ACE601CCD4E3641847C06DF0F71799" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessCombinationConsiderationTransferred1_987EBE5AF85DEB1B6170C06DF0F729FC_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationConsiderationTransferred1_987EBE5AF85DEB1B6170C06DF0F729FC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aggregate purchase price</link:label>
    <link:label id="lab_us-gaap_BusinessCombinationConsiderationTransferred1_987EBE5AF85DEB1B6170C06DF0F729FC_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationConsiderationTransferred1_987EBE5AF85DEB1B6170C06DF0F729FC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Consideration Transferred</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferred1" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_987EBE5AF85DEB1B6170C06DF0F729FC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessCombinationConsiderationTransferred1_987EBE5AF85DEB1B6170C06DF0F729FC" xlink:to="lab_us-gaap_BusinessCombinationConsiderationTransferred1_987EBE5AF85DEB1B6170C06DF0F729FC" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsToAcquireBusinessesGross_4D82DBB68FEB701C4E8EC06DF0F7771D_verboseLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireBusinessesGross_4D82DBB68FEB701C4E8EC06DF0F7771D" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Closing cash payment</link:label>
    <link:label id="lab_us-gaap_PaymentsToAcquireBusinessesGross_4D82DBB68FEB701C4E8EC06DF0F7771D_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireBusinessesGross_4D82DBB68FEB701C4E8EC06DF0F7771D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments to Acquire Businesses, Gross</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesGross" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_4D82DBB68FEB701C4E8EC06DF0F7771D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToAcquireBusinessesGross_4D82DBB68FEB701C4E8EC06DF0F7771D" xlink:to="lab_us-gaap_PaymentsToAcquireBusinessesGross_4D82DBB68FEB701C4E8EC06DF0F7771D" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessCombinationContingentConsiderationLiability_368E57728D672E9C2361C06DF0F7FB0C_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationContingentConsiderationLiability_368E57728D672E9C2361C06DF0F7FB0C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred acquisition consideration</link:label>
    <link:label id="lab_us-gaap_BusinessCombinationContingentConsiderationLiability_368E57728D672E9C2361C06DF0F7FB0C_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationContingentConsiderationLiability_368E57728D672E9C2361C06DF0F7FB0C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Contingent Consideration, Liability</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_368E57728D672E9C2361C06DF0F7FB0C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_368E57728D672E9C2361C06DF0F7FB0C" xlink:to="lab_us-gaap_BusinessCombinationContingentConsiderationLiability_368E57728D672E9C2361C06DF0F7FB0C" xlink:type="arc" />
    <link:label id="lab_mdca_Redeemablenoncontrollinginterestredemptionsvalue_7F1A2FFCCB950519C97AC06DF0F7BB61_verboseLabel_en-US" xlink:label="lab_mdca_Redeemablenoncontrollinginterestredemptionsvalue_7F1A2FFCCB950519C97AC06DF0F7BB61" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Redeemable noncontrolling interest, redemptions, value</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_Redeemablenoncontrollinginterestredemptionsvalue" xlink:label="loc_mdca_Redeemablenoncontrollinginterestredemptionsvalue_7F1A2FFCCB950519C97AC06DF0F7BB61" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_Redeemablenoncontrollinginterestredemptionsvalue_7F1A2FFCCB950519C97AC06DF0F7BB61" xlink:to="lab_mdca_Redeemablenoncontrollinginterestredemptionsvalue_7F1A2FFCCB950519C97AC06DF0F7BB61" xlink:type="arc" />
    <link:label id="lab_us-gaap_MinorityInterestDecreaseFromRedemptions_E2190433AF462B16C71FC06DF0F71660_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_MinorityInterestDecreaseFromRedemptions_E2190433AF462B16C71FC06DF0F71660" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Business acquisitions and step-up transactions, net of tax</link:label>
    <link:label id="lab_us-gaap_MinorityInterestDecreaseFromRedemptions_E2190433AF462B16C71FC06DF0F71660_label_en-US" xlink:label="lab_us-gaap_MinorityInterestDecreaseFromRedemptions_E2190433AF462B16C71FC06DF0F71660" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MinorityInterestDecreaseFromRedemptions" xlink:label="loc_us-gaap_MinorityInterestDecreaseFromRedemptions_E2190433AF462B16C71FC06DF0F71660" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MinorityInterestDecreaseFromRedemptions_E2190433AF462B16C71FC06DF0F71660" xlink:to="lab_us-gaap_MinorityInterestDecreaseFromRedemptions_E2190433AF462B16C71FC06DF0F71660" xlink:type="arc" />
    <link:label id="lab_us-gaap_GainLossOnSaleOfBusiness_7F9286CECA15B2A8EA25C06DF0F72701_terseLabel_en-US" xlink:label="lab_us-gaap_GainLossOnSaleOfBusiness_7F9286CECA15B2A8EA25C06DF0F72701" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gain (loss) on disposition of business</link:label>
    <link:label id="lab_us-gaap_GainLossOnSaleOfBusiness_7F9286CECA15B2A8EA25C06DF0F72701_label_en-US" xlink:label="lab_us-gaap_GainLossOnSaleOfBusiness_7F9286CECA15B2A8EA25C06DF0F72701" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gain (Loss) on Disposition of Business</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GainLossOnSaleOfBusiness" xlink:label="loc_us-gaap_GainLossOnSaleOfBusiness_7F9286CECA15B2A8EA25C06DF0F72701" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GainLossOnSaleOfBusiness_7F9286CECA15B2A8EA25C06DF0F72701" xlink:to="lab_us-gaap_GainLossOnSaleOfBusiness_7F9286CECA15B2A8EA25C06DF0F72701" xlink:type="arc" />
    <link:label id="lab_mdca_BusinessCombinationAcquisitionofLessthan100PercentRedeemableNoncontrollingInterestFairValue_2EE4ABAA4CBE774B5EECC06DF0F7A0DD_terseLabel_en-US" xlink:label="lab_mdca_BusinessCombinationAcquisitionofLessthan100PercentRedeemableNoncontrollingInterestFairValue_2EE4ABAA4CBE774B5EECC06DF0F7A0DD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reduction in noncontrolling interests</link:label>
    <link:label id="lab_mdca_BusinessCombinationAcquisitionofLessthan100PercentRedeemableNoncontrollingInterestFairValue_2EE4ABAA4CBE774B5EECC06DF0F7A0DD_label_en-US" xlink:label="lab_mdca_BusinessCombinationAcquisitionofLessthan100PercentRedeemableNoncontrollingInterestFairValue_2EE4ABAA4CBE774B5EECC06DF0F7A0DD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Acquisition of Less than 100 Percent, Redeemable Noncontrolling Interest, Fair Value</link:label>
    <link:label id="lab_mdca_BusinessCombinationAcquisitionofLessthan100PercentRedeemableNoncontrollingInterestFairValue_2EE4ABAA4CBE774B5EECC06DF0F7A0DD_documentation_en-US" xlink:label="lab_mdca_BusinessCombinationAcquisitionofLessthan100PercentRedeemableNoncontrollingInterestFairValue_2EE4ABAA4CBE774B5EECC06DF0F7A0DD" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Business Combination, Acquisition of Less than 100 Percent, Redeemable Noncontrolling Interest, Fair Value</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_BusinessCombinationAcquisitionofLessthan100PercentRedeemableNoncontrollingInterestFairValue" xlink:label="loc_mdca_BusinessCombinationAcquisitionofLessthan100PercentRedeemableNoncontrollingInterestFairValue_2EE4ABAA4CBE774B5EECC06DF0F7A0DD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_BusinessCombinationAcquisitionofLessthan100PercentRedeemableNoncontrollingInterestFairValue_2EE4ABAA4CBE774B5EECC06DF0F7A0DD" xlink:to="lab_mdca_BusinessCombinationAcquisitionofLessthan100PercentRedeemableNoncontrollingInterestFairValue_2EE4ABAA4CBE774B5EECC06DF0F7A0DD" xlink:type="arc" />
    <link:label id="lab_mdca_AccruedAndOtherLiabilitiesAttributableToNoncontrollingInterest_0211B6671F6A412660ACC01123EF208A_periodStartLabel_en-US" xlink:label="lab_mdca_AccruedAndOtherLiabilitiesAttributableToNoncontrollingInterest_0211B6671F6A412660ACC01123EF208A" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Beginning balance</link:label>
    <link:label id="lab_mdca_AccruedAndOtherLiabilitiesAttributableToNoncontrollingInterest_0211B6671F6A412660ACC01123EF208A_label_en-US" xlink:label="lab_mdca_AccruedAndOtherLiabilitiesAttributableToNoncontrollingInterest_0211B6671F6A412660ACC01123EF208A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accrued and Other Liabilities Attributable To Noncontrolling Interest</link:label>
    <link:label id="lab_mdca_AccruedAndOtherLiabilitiesAttributableToNoncontrollingInterest_0211B6671F6A412660ACC01123EF208A_documentation_en-US" xlink:label="lab_mdca_AccruedAndOtherLiabilitiesAttributableToNoncontrollingInterest_0211B6671F6A412660ACC01123EF208A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Carrying value as of the balance sheet date of accrued and other liabilities attributable to noncontrolling interest during the reporting period.</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_AccruedAndOtherLiabilitiesAttributableToNoncontrollingInterest" xlink:label="loc_mdca_AccruedAndOtherLiabilitiesAttributableToNoncontrollingInterest_0211B6671F6A412660ACC01123EF208A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_AccruedAndOtherLiabilitiesAttributableToNoncontrollingInterest_0211B6671F6A412660ACC01123EF208A" xlink:to="lab_mdca_AccruedAndOtherLiabilitiesAttributableToNoncontrollingInterest_0211B6671F6A412660ACC01123EF208A" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_7A16C688F77EDC8A96EBC01123EFD99B_terseLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_7A16C688F77EDC8A96EBC01123EFD99B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income attributable to noncontrolling interests</link:label>
    <link:label id="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_7A16C688F77EDC8A96EBC01123EFD99B_label_en-US" xlink:label="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_7A16C688F77EDC8A96EBC01123EFD99B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Income (Loss) Attributable to Noncontrolling Interest</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_7A16C688F77EDC8A96EBC01123EFD99B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_7A16C688F77EDC8A96EBC01123EFD99B" xlink:to="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_7A16C688F77EDC8A96EBC01123EFD99B" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsToMinorityShareholders_4688E95ECA63DA8DE033C01123F0D0EA_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsToMinorityShareholders_4688E95ECA63DA8DE033C01123F0D0EA" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Distributions made</link:label>
    <link:label id="lab_us-gaap_PaymentsToMinorityShareholders_4688E95ECA63DA8DE033C01123F0D0EA_label_en-US" xlink:label="lab_us-gaap_PaymentsToMinorityShareholders_4688E95ECA63DA8DE033C01123F0D0EA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments to Noncontrolling Interests</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToMinorityShareholders" xlink:label="loc_us-gaap_PaymentsToMinorityShareholders_4688E95ECA63DA8DE033C01123F0D0EA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToMinorityShareholders_4688E95ECA63DA8DE033C01123F0D0EA" xlink:to="lab_us-gaap_PaymentsToMinorityShareholders_4688E95ECA63DA8DE033C01123F0D0EA" xlink:type="arc" />
    <link:label id="lab_mdca_AdjustmentsToNoncontrollingInterest_5B7F47A7D0EFA5CB4043C01123F0F825_verboseLabel_en-US" xlink:label="lab_mdca_AdjustmentsToNoncontrollingInterest_5B7F47A7D0EFA5CB4043C01123F0F825" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Other</link:label>
    <link:label id="lab_mdca_AdjustmentsToNoncontrollingInterest_5B7F47A7D0EFA5CB4043C01123F0F825_label_en-US" xlink:label="lab_mdca_AdjustmentsToNoncontrollingInterest_5B7F47A7D0EFA5CB4043C01123F0F825" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustments To Noncontrolling Interest</link:label>
    <link:label id="lab_mdca_AdjustmentsToNoncontrollingInterest_5B7F47A7D0EFA5CB4043C01123F0F825_documentation_en-US" xlink:label="lab_mdca_AdjustmentsToNoncontrollingInterest_5B7F47A7D0EFA5CB4043C01123F0F825" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Other transactions related to noncontrolling interest.</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_AdjustmentsToNoncontrollingInterest" xlink:label="loc_mdca_AdjustmentsToNoncontrollingInterest_5B7F47A7D0EFA5CB4043C01123F0F825" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_AdjustmentsToNoncontrollingInterest_5B7F47A7D0EFA5CB4043C01123F0F825" xlink:to="lab_mdca_AdjustmentsToNoncontrollingInterest_5B7F47A7D0EFA5CB4043C01123F0F825" xlink:type="arc" />
    <link:label id="lab_mdca_AccruedAndOtherLiabilitiesAttributableToNoncontrollingInterest_D6BF1736F412E3FB71EBC01123F01D2C_periodEndLabel_en-US" xlink:label="lab_mdca_AccruedAndOtherLiabilitiesAttributableToNoncontrollingInterest_D6BF1736F412E3FB71EBC01123F01D2C" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Ending balance</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_AccruedAndOtherLiabilitiesAttributableToNoncontrollingInterest" xlink:label="loc_mdca_AccruedAndOtherLiabilitiesAttributableToNoncontrollingInterest_D6BF1736F412E3FB71EBC01123F01D2C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_AccruedAndOtherLiabilitiesAttributableToNoncontrollingInterest_D6BF1736F412E3FB71EBC01123F01D2C" xlink:to="lab_mdca_AccruedAndOtherLiabilitiesAttributableToNoncontrollingInterest_D6BF1736F412E3FB71EBC01123F01D2C" xlink:type="arc" />
    <link:label id="lab_us-gaap_MinorityInterestTable_F3FAAA321F9AF751C9CCC01123EAC094_terseLabel_en-US" xlink:label="lab_us-gaap_MinorityInterestTable_F3FAAA321F9AF751C9CCC01123EAC094" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Noncontrolling Interest [Table]</link:label>
    <link:label id="lab_us-gaap_MinorityInterestTable_F3FAAA321F9AF751C9CCC01123EAC094_label_en-US" xlink:label="lab_us-gaap_MinorityInterestTable_F3FAAA321F9AF751C9CCC01123EAC094" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Noncontrolling Interest [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MinorityInterestTable" xlink:label="loc_us-gaap_MinorityInterestTable_F3FAAA321F9AF751C9CCC01123EAC094" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MinorityInterestTable_F3FAAA321F9AF751C9CCC01123EAC094" xlink:to="lab_us-gaap_MinorityInterestTable_F3FAAA321F9AF751C9CCC01123EAC094" xlink:type="arc" />
    <link:label id="lab_us-gaap_ParentMember_A3815E55C8554F97A32BC01123EB29F7_terseLabel_en-US" xlink:label="lab_us-gaap_ParentMember_A3815E55C8554F97A32BC01123EB29F7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">MDC Partners Inc. Shareholders' Deficit</link:label>
    <link:label id="lab_us-gaap_ParentMember_A3815E55C8554F97A32BC01123EB29F7_label_en-US" xlink:label="lab_us-gaap_ParentMember_A3815E55C8554F97A32BC01123EB29F7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Parent [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ParentMember" xlink:label="loc_us-gaap_ParentMember_A3815E55C8554F97A32BC01123EB29F7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ParentMember_A3815E55C8554F97A32BC01123EB29F7" xlink:to="lab_us-gaap_ParentMember_A3815E55C8554F97A32BC01123EB29F7" xlink:type="arc" />
    <link:label id="lab_us-gaap_MinorityInterestLineItems_A6E18BF889B204E47DB9C01123EBCD5A_terseLabel_en-US" xlink:label="lab_us-gaap_MinorityInterestLineItems_A6E18BF889B204E47DB9C01123EBCD5A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Noncontrolling Interest [Line Items]</link:label>
    <link:label id="lab_us-gaap_MinorityInterestLineItems_A6E18BF889B204E47DB9C01123EBCD5A_label_en-US" xlink:label="lab_us-gaap_MinorityInterestLineItems_A6E18BF889B204E47DB9C01123EBCD5A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Noncontrolling Interest [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MinorityInterestLineItems" xlink:label="loc_us-gaap_MinorityInterestLineItems_A6E18BF889B204E47DB9C01123EBCD5A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MinorityInterestLineItems_A6E18BF889B204E47DB9C01123EBCD5A" xlink:to="lab_us-gaap_MinorityInterestLineItems_A6E18BF889B204E47DB9C01123EBCD5A" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetIncomeLoss_CA82B7DB17A8E0A9187EC01123EC8056_terseLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLoss_CA82B7DB17A8E0A9187EC01123EC8056" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net loss attributable to MDC Partners Inc.</link:label>
    <link:label id="lab_us-gaap_NetIncomeLoss_CA82B7DB17A8E0A9187EC01123EC8056_label_en-US" xlink:label="lab_us-gaap_NetIncomeLoss_CA82B7DB17A8E0A9187EC01123EC8056" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Income (Loss) Attributable to Parent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_CA82B7DB17A8E0A9187EC01123EC8056" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetIncomeLoss_CA82B7DB17A8E0A9187EC01123EC8056" xlink:to="lab_us-gaap_NetIncomeLoss_CA82B7DB17A8E0A9187EC01123EC8056" xlink:type="arc" />
    <link:label id="lab_mdca_AdjustmentstoAdditionalPaidinCapitalChangesduetoBusinessCombinations_A40B360E024B8335D261C01123EC26AC_terseLabel_en-US" xlink:label="lab_mdca_AdjustmentstoAdditionalPaidinCapitalChangesduetoBusinessCombinations_A40B360E024B8335D261C01123EC26AC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Decrease in MDC Partners Inc. paid-in capital for purchase of redeemable noncontrolling interests and noncontrolling interests</link:label>
    <link:label id="lab_mdca_AdjustmentstoAdditionalPaidinCapitalChangesduetoBusinessCombinations_A40B360E024B8335D261C01123EC26AC_label_en-US" xlink:label="lab_mdca_AdjustmentstoAdditionalPaidinCapitalChangesduetoBusinessCombinations_A40B360E024B8335D261C01123EC26AC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustments to Additional Paid in Capital, Changes due to Business Combinations</link:label>
    <link:label id="lab_mdca_AdjustmentstoAdditionalPaidinCapitalChangesduetoBusinessCombinations_A40B360E024B8335D261C01123EC26AC_documentation_en-US" xlink:label="lab_mdca_AdjustmentstoAdditionalPaidinCapitalChangesduetoBusinessCombinations_A40B360E024B8335D261C01123EC26AC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Adjustments to Additional Paid in Capital, Changes due to Business Combinations</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_AdjustmentstoAdditionalPaidinCapitalChangesduetoBusinessCombinations" xlink:label="loc_mdca_AdjustmentstoAdditionalPaidinCapitalChangesduetoBusinessCombinations_A40B360E024B8335D261C01123EC26AC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_AdjustmentstoAdditionalPaidinCapitalChangesduetoBusinessCombinations_A40B360E024B8335D261C01123EC26AC" xlink:to="lab_mdca_AdjustmentstoAdditionalPaidinCapitalChangesduetoBusinessCombinations_A40B360E024B8335D261C01123EC26AC" xlink:type="arc" />
    <link:label id="lab_mdca_NetIncomeLossIncludingTransferfromNonControllingInterests_0B582A21D080F4CDC08FC01123EC4679_negatedLabel_en-US" xlink:label="lab_mdca_NetIncomeLossIncludingTransferfromNonControllingInterests_0B582A21D080F4CDC08FC01123EC4679" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Change from net income (loss) attributable to MDC Partners Inc. and transfers to noncontrolling interests</link:label>
    <link:label id="lab_mdca_NetIncomeLossIncludingTransferfromNonControllingInterests_0B582A21D080F4CDC08FC01123EC4679_label_en-US" xlink:label="lab_mdca_NetIncomeLossIncludingTransferfromNonControllingInterests_0B582A21D080F4CDC08FC01123EC4679" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Income Loss Including Transfer from Non Controlling Interests</link:label>
    <link:label id="lab_mdca_NetIncomeLossIncludingTransferfromNonControllingInterests_0B582A21D080F4CDC08FC01123EC4679_documentation_en-US" xlink:label="lab_mdca_NetIncomeLossIncludingTransferfromNonControllingInterests_0B582A21D080F4CDC08FC01123EC4679" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Net Income Loss Including Transfer from Non Controlling Interests</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_NetIncomeLossIncludingTransferfromNonControllingInterests" xlink:label="loc_mdca_NetIncomeLossIncludingTransferfromNonControllingInterests_0B582A21D080F4CDC08FC01123EC4679" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_NetIncomeLossIncludingTransferfromNonControllingInterests_0B582A21D080F4CDC08FC01123EC4679" xlink:to="lab_mdca_NetIncomeLossIncludingTransferfromNonControllingInterests_0B582A21D080F4CDC08FC01123EC4679" xlink:type="arc" />
    <link:label id="lab_us-gaap_RelatedPartyTransactionsAbstract_139046AF6339E38CE96EC01123A4C9FA_label_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionsAbstract_139046AF6339E38CE96EC01123A4C9FA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Related Party Transactions [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyTransactionsAbstract" xlink:label="loc_us-gaap_RelatedPartyTransactionsAbstract_139046AF6339E38CE96EC01123A4C9FA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RelatedPartyTransactionsAbstract_139046AF6339E38CE96EC01123A4C9FA" xlink:to="lab_us-gaap_RelatedPartyTransactionsAbstract_139046AF6339E38CE96EC01123A4C9FA" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_2D28E2634F725F900BD0C01123A4C803_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_2D28E2634F725F900BD0C01123A4C803" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Related Party Transactions, by Related Party [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_2D28E2634F725F900BD0C01123A4C803_label_en-US" xlink:label="lab_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_2D28E2634F725F900BD0C01123A4C803" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Related Party Transactions, by Related Party [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_2D28E2634F725F900BD0C01123A4C803" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_2D28E2634F725F900BD0C01123A4C803" xlink:to="lab_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_2D28E2634F725F900BD0C01123A4C803" xlink:type="arc" />
    <link:label id="lab_srt_CounterpartyNameAxis_F065FAAC1177E51BD0B4C01123A4D6F9_terseLabel_en-US" xlink:label="lab_srt_CounterpartyNameAxis_F065FAAC1177E51BD0B4C01123A4D6F9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Counterparty Name [Axis]</link:label>
    <link:label id="lab_srt_CounterpartyNameAxis_F065FAAC1177E51BD0B4C01123A4D6F9_label_en-US" xlink:label="lab_srt_CounterpartyNameAxis_F065FAAC1177E51BD0B4C01123A4D6F9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Counterparty Name [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_CounterpartyNameAxis" xlink:label="loc_srt_CounterpartyNameAxis_F065FAAC1177E51BD0B4C01123A4D6F9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_CounterpartyNameAxis_F065FAAC1177E51BD0B4C01123A4D6F9" xlink:to="lab_srt_CounterpartyNameAxis_F065FAAC1177E51BD0B4C01123A4D6F9" xlink:type="arc" />
    <link:label id="lab_srt_RepurchaseAgreementCounterpartyNameDomain_E8A55038744EE4B12E0DC01123A5928A_terseLabel_en-US" xlink:label="lab_srt_RepurchaseAgreementCounterpartyNameDomain_E8A55038744EE4B12E0DC01123A5928A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Counterparty Name [Domain]</link:label>
    <link:label id="lab_srt_RepurchaseAgreementCounterpartyNameDomain_E8A55038744EE4B12E0DC01123A5928A_label_en-US" xlink:label="lab_srt_RepurchaseAgreementCounterpartyNameDomain_E8A55038744EE4B12E0DC01123A5928A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Counterparty Name [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_E8A55038744EE4B12E0DC01123A5928A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_E8A55038744EE4B12E0DC01123A5928A" xlink:to="lab_srt_RepurchaseAgreementCounterpartyNameDomain_E8A55038744EE4B12E0DC01123A5928A" xlink:type="arc" />
    <link:label id="lab_mdca_OtherCompanyMember_E9C263095074AD2981F5C01123A5A261_terseLabel_en-US" xlink:label="lab_mdca_OtherCompanyMember_E9C263095074AD2981F5C01123A5A261" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Company [Member]</link:label>
    <link:label id="lab_mdca_OtherCompanyMember_E9C263095074AD2981F5C01123A5A261_label_en-US" xlink:label="lab_mdca_OtherCompanyMember_E9C263095074AD2981F5C01123A5A261" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Company [Member]</link:label>
    <link:label id="lab_mdca_OtherCompanyMember_E9C263095074AD2981F5C01123A5A261_documentation_en-US" xlink:label="lab_mdca_OtherCompanyMember_E9C263095074AD2981F5C01123A5A261" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Other Company [Member]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_OtherCompanyMember" xlink:label="loc_mdca_OtherCompanyMember_E9C263095074AD2981F5C01123A5A261" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_OtherCompanyMember_E9C263095074AD2981F5C01123A5A261" xlink:to="lab_mdca_OtherCompanyMember_E9C263095074AD2981F5C01123A5A261" xlink:type="arc" />
    <link:label id="lab_srt_TitleOfIndividualAxis_144E4233AB908CA73F91C01123A5A7A4_terseLabel_en-US" xlink:label="lab_srt_TitleOfIndividualAxis_144E4233AB908CA73F91C01123A5A7A4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Title of Individual [Axis]</link:label>
    <link:label id="lab_srt_TitleOfIndividualAxis_144E4233AB908CA73F91C01123A5A7A4_label_en-US" xlink:label="lab_srt_TitleOfIndividualAxis_144E4233AB908CA73F91C01123A5A7A4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Title of Individual [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_TitleOfIndividualAxis" xlink:label="loc_srt_TitleOfIndividualAxis_144E4233AB908CA73F91C01123A5A7A4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_TitleOfIndividualAxis_144E4233AB908CA73F91C01123A5A7A4" xlink:to="lab_srt_TitleOfIndividualAxis_144E4233AB908CA73F91C01123A5A7A4" xlink:type="arc" />
    <link:label id="lab_srt_TitleOfIndividualWithRelationshipToEntityDomain_FD3B65573E63131E21D3C01123A6537E_terseLabel_en-US" xlink:label="lab_srt_TitleOfIndividualWithRelationshipToEntityDomain_FD3B65573E63131E21D3C01123A6537E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Title of Individual [Domain]</link:label>
    <link:label id="lab_srt_TitleOfIndividualWithRelationshipToEntityDomain_FD3B65573E63131E21D3C01123A6537E_label_en-US" xlink:label="lab_srt_TitleOfIndividualWithRelationshipToEntityDomain_FD3B65573E63131E21D3C01123A6537E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Title of Individual [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_FD3B65573E63131E21D3C01123A6537E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_FD3B65573E63131E21D3C01123A6537E" xlink:to="lab_srt_TitleOfIndividualWithRelationshipToEntityDomain_FD3B65573E63131E21D3C01123A6537E" xlink:type="arc" />
    <link:label id="lab_srt_BoardOfDirectorsChairmanMember_8FCA098674302B94F533C01123A63E7A_terseLabel_en-US" xlink:label="lab_srt_BoardOfDirectorsChairmanMember_8FCA098674302B94F533C01123A63E7A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Board of Directors Chairman [Member]</link:label>
    <link:label id="lab_srt_BoardOfDirectorsChairmanMember_8FCA098674302B94F533C01123A63E7A_label_en-US" xlink:label="lab_srt_BoardOfDirectorsChairmanMember_8FCA098674302B94F533C01123A63E7A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Board of Directors Chairman [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_BoardOfDirectorsChairmanMember" xlink:label="loc_srt_BoardOfDirectorsChairmanMember_8FCA098674302B94F533C01123A63E7A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_BoardOfDirectorsChairmanMember_8FCA098674302B94F533C01123A63E7A" xlink:to="lab_srt_BoardOfDirectorsChairmanMember_8FCA098674302B94F533C01123A63E7A" xlink:type="arc" />
    <link:label id="lab_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_7D53F56137F7993629D5C01123A661E2_terseLabel_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_7D53F56137F7993629D5C01123A661E2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Related Party [Axis]</link:label>
    <link:label id="lab_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_7D53F56137F7993629D5C01123A661E2_label_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_7D53F56137F7993629D5C01123A661E2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Related Party [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_7D53F56137F7993629D5C01123A661E2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_7D53F56137F7993629D5C01123A661E2" xlink:to="lab_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_7D53F56137F7993629D5C01123A661E2" xlink:type="arc" />
    <link:label id="lab_us-gaap_RelatedPartyDomain_9A6DEED243EC8659695CC01123A60FDE_terseLabel_en-US" xlink:label="lab_us-gaap_RelatedPartyDomain_9A6DEED243EC8659695CC01123A60FDE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Related Party [Domain]</link:label>
    <link:label id="lab_us-gaap_RelatedPartyDomain_9A6DEED243EC8659695CC01123A60FDE_label_en-US" xlink:label="lab_us-gaap_RelatedPartyDomain_9A6DEED243EC8659695CC01123A60FDE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Related Party [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaap_RelatedPartyDomain_9A6DEED243EC8659695CC01123A60FDE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RelatedPartyDomain_9A6DEED243EC8659695CC01123A60FDE" xlink:to="lab_us-gaap_RelatedPartyDomain_9A6DEED243EC8659695CC01123A60FDE" xlink:type="arc" />
    <link:label id="lab_mdca_StagwellSubsidiaryMember_7B22C07EA2D3E21194CAC01123A65FD0_terseLabel_en-US" xlink:label="lab_mdca_StagwellSubsidiaryMember_7B22C07EA2D3E21194CAC01123A65FD0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stagwell Subsidiary [Member]</link:label>
    <link:label id="lab_mdca_StagwellSubsidiaryMember_7B22C07EA2D3E21194CAC01123A65FD0_label_en-US" xlink:label="lab_mdca_StagwellSubsidiaryMember_7B22C07EA2D3E21194CAC01123A65FD0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stagwell Subsidiary [Member]</link:label>
    <link:label id="lab_mdca_StagwellSubsidiaryMember_7B22C07EA2D3E21194CAC01123A65FD0_documentation_en-US" xlink:label="lab_mdca_StagwellSubsidiaryMember_7B22C07EA2D3E21194CAC01123A65FD0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Stagwell Subsidiary [Member]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_StagwellSubsidiaryMember" xlink:label="loc_mdca_StagwellSubsidiaryMember_7B22C07EA2D3E21194CAC01123A65FD0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_StagwellSubsidiaryMember_7B22C07EA2D3E21194CAC01123A65FD0" xlink:to="lab_mdca_StagwellSubsidiaryMember_7B22C07EA2D3E21194CAC01123A65FD0" xlink:type="arc" />
    <link:label id="lab_us-gaap_RelatedPartyTransactionAxis_AD50EFADA09DB6E8C93EC01123A7D5F3_terseLabel_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionAxis_AD50EFADA09DB6E8C93EC01123A7D5F3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Related Party Transaction [Axis]</link:label>
    <link:label id="lab_us-gaap_RelatedPartyTransactionAxis_AD50EFADA09DB6E8C93EC01123A7D5F3_label_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionAxis_AD50EFADA09DB6E8C93EC01123A7D5F3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Related Party Transaction [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyTransactionAxis" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_AD50EFADA09DB6E8C93EC01123A7D5F3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_AD50EFADA09DB6E8C93EC01123A7D5F3" xlink:to="lab_us-gaap_RelatedPartyTransactionAxis_AD50EFADA09DB6E8C93EC01123A7D5F3" xlink:type="arc" />
    <link:label id="lab_us-gaap_RelatedPartyTransactionDomain_917C5B7F4F55FF88E425C01123A7CC29_terseLabel_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionDomain_917C5B7F4F55FF88E425C01123A7CC29" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Related Party Transaction [Domain]</link:label>
    <link:label id="lab_us-gaap_RelatedPartyTransactionDomain_917C5B7F4F55FF88E425C01123A7CC29_label_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionDomain_917C5B7F4F55FF88E425C01123A7CC29" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Related Party Transaction [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyTransactionDomain" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_917C5B7F4F55FF88E425C01123A7CC29" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_917C5B7F4F55FF88E425C01123A7CC29" xlink:to="lab_us-gaap_RelatedPartyTransactionDomain_917C5B7F4F55FF88E425C01123A7CC29" xlink:type="arc" />
    <link:label id="lab_mdca_ServicesProvidedBySubisidiaryMember_EF43498287C78204EC8FC01123A76841_terseLabel_en-US" xlink:label="lab_mdca_ServicesProvidedBySubisidiaryMember_EF43498287C78204EC8FC01123A76841" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Services Provided By Subisidiary [Member]</link:label>
    <link:label id="lab_mdca_ServicesProvidedBySubisidiaryMember_EF43498287C78204EC8FC01123A76841_label_en-US" xlink:label="lab_mdca_ServicesProvidedBySubisidiaryMember_EF43498287C78204EC8FC01123A76841" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Services Provided By Subisidiary [Member]</link:label>
    <link:label id="lab_mdca_ServicesProvidedBySubisidiaryMember_EF43498287C78204EC8FC01123A76841_documentation_en-US" xlink:label="lab_mdca_ServicesProvidedBySubisidiaryMember_EF43498287C78204EC8FC01123A76841" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Services Provided By Subisidiary [Member]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_ServicesProvidedBySubisidiaryMember" xlink:label="loc_mdca_ServicesProvidedBySubisidiaryMember_EF43498287C78204EC8FC01123A76841" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_ServicesProvidedBySubisidiaryMember_EF43498287C78204EC8FC01123A76841" xlink:to="lab_mdca_ServicesProvidedBySubisidiaryMember_EF43498287C78204EC8FC01123A76841" xlink:type="arc" />
    <link:label id="lab_mdca_DevelopmentofAdvertisingTechnologyMember_9D64FD33D0D5CC942552C01123A77DE4_terseLabel_en-US" xlink:label="lab_mdca_DevelopmentofAdvertisingTechnologyMember_9D64FD33D0D5CC942552C01123A77DE4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Development of Advertising Technology [Member]</link:label>
    <link:label id="lab_mdca_DevelopmentofAdvertisingTechnologyMember_9D64FD33D0D5CC942552C01123A77DE4_label_en-US" xlink:label="lab_mdca_DevelopmentofAdvertisingTechnologyMember_9D64FD33D0D5CC942552C01123A77DE4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Development of Advertising Technology [Member]</link:label>
    <link:label id="lab_mdca_DevelopmentofAdvertisingTechnologyMember_9D64FD33D0D5CC942552C01123A77DE4_documentation_en-US" xlink:label="lab_mdca_DevelopmentofAdvertisingTechnologyMember_9D64FD33D0D5CC942552C01123A77DE4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Development of Advertising Technology [Member]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_DevelopmentofAdvertisingTechnologyMember" xlink:label="loc_mdca_DevelopmentofAdvertisingTechnologyMember_9D64FD33D0D5CC942552C01123A77DE4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_DevelopmentofAdvertisingTechnologyMember_9D64FD33D0D5CC942552C01123A77DE4" xlink:to="lab_mdca_DevelopmentofAdvertisingTechnologyMember_9D64FD33D0D5CC942552C01123A77DE4" xlink:type="arc" />
    <link:label id="lab_us-gaap_RelatedPartyTransactionLineItems_BD4D21238C821F8F4213C01123A82B8C_terseLabel_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionLineItems_BD4D21238C821F8F4213C01123A82B8C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Related Party Transaction [Line Items]</link:label>
    <link:label id="lab_us-gaap_RelatedPartyTransactionLineItems_BD4D21238C821F8F4213C01123A82B8C_label_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionLineItems_BD4D21238C821F8F4213C01123A82B8C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Related Party Transaction [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_BD4D21238C821F8F4213C01123A82B8C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_BD4D21238C821F8F4213C01123A82B8C" xlink:to="lab_us-gaap_RelatedPartyTransactionLineItems_BD4D21238C821F8F4213C01123A82B8C" xlink:type="arc" />
    <link:label id="lab_us-gaap_DueToRelatedPartiesCurrentAndNoncurrent_A13E1E98EB0CA812684AC01123A86166_terseLabel_en-US" xlink:label="lab_us-gaap_DueToRelatedPartiesCurrentAndNoncurrent_A13E1E98EB0CA812684AC01123A86166" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Due to Related Parties</link:label>
    <link:label id="lab_us-gaap_DueToRelatedPartiesCurrentAndNoncurrent_A13E1E98EB0CA812684AC01123A86166_label_en-US" xlink:label="lab_us-gaap_DueToRelatedPartiesCurrentAndNoncurrent_A13E1E98EB0CA812684AC01123A86166" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Due to Related Parties</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DueToRelatedPartiesCurrentAndNoncurrent" xlink:label="loc_us-gaap_DueToRelatedPartiesCurrentAndNoncurrent_A13E1E98EB0CA812684AC01123A86166" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DueToRelatedPartiesCurrentAndNoncurrent_A13E1E98EB0CA812684AC01123A86166" xlink:to="lab_us-gaap_DueToRelatedPartiesCurrentAndNoncurrent_A13E1E98EB0CA812684AC01123A86166" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccountsPayableRelatedPartiesCurrentAndNoncurrent_A1F3685CB7FC7DAB7520C01123A81E5A_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsPayableRelatedPartiesCurrentAndNoncurrent_A1F3685CB7FC7DAB7520C01123A81E5A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accounts Payable, Related Parties</link:label>
    <link:label id="lab_us-gaap_AccountsPayableRelatedPartiesCurrentAndNoncurrent_A1F3685CB7FC7DAB7520C01123A81E5A_label_en-US" xlink:label="lab_us-gaap_AccountsPayableRelatedPartiesCurrentAndNoncurrent_A1F3685CB7FC7DAB7520C01123A81E5A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accounts Payable, Related Parties</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountsPayableRelatedPartiesCurrentAndNoncurrent" xlink:label="loc_us-gaap_AccountsPayableRelatedPartiesCurrentAndNoncurrent_A1F3685CB7FC7DAB7520C01123A81E5A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccountsPayableRelatedPartiesCurrentAndNoncurrent_A1F3685CB7FC7DAB7520C01123A81E5A" xlink:to="lab_us-gaap_AccountsPayableRelatedPartiesCurrentAndNoncurrent_A1F3685CB7FC7DAB7520C01123A81E5A" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubleaseIncome_3816EF7CA5651805565AC01123A8D8B1_terseLabel_en-US" xlink:label="lab_us-gaap_SubleaseIncome_3816EF7CA5651805565AC01123A8D8B1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sublease rental income</link:label>
    <link:label id="lab_us-gaap_SubleaseIncome_3816EF7CA5651805565AC01123A8D8B1_label_en-US" xlink:label="lab_us-gaap_SubleaseIncome_3816EF7CA5651805565AC01123A8D8B1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sublease Income</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SubleaseIncome" xlink:label="loc_us-gaap_SubleaseIncome_3816EF7CA5651805565AC01123A8D8B1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubleaseIncome_3816EF7CA5651805565AC01123A8D8B1" xlink:to="lab_us-gaap_SubleaseIncome_3816EF7CA5651805565AC01123A8D8B1" xlink:type="arc" />
    <link:label id="lab_mdca_ShareCapitalAbstract_0F17AB1307C0AF207FA2C01123D203CB_label_en-US" xlink:label="lab_mdca_ShareCapitalAbstract_0F17AB1307C0AF207FA2C01123D203CB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share Capital [Abstract]</link:label>
    <link:label id="lab_mdca_ShareCapitalAbstract_0F17AB1307C0AF207FA2C01123D203CB_documentation_en-US" xlink:label="lab_mdca_ShareCapitalAbstract_0F17AB1307C0AF207FA2C01123D203CB" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Share Capital [Abstract]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_ShareCapitalAbstract" xlink:label="loc_mdca_ShareCapitalAbstract_0F17AB1307C0AF207FA2C01123D203CB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_ShareCapitalAbstract_0F17AB1307C0AF207FA2C01123D203CB" xlink:to="lab_mdca_ShareCapitalAbstract_0F17AB1307C0AF207FA2C01123D203CB" xlink:type="arc" />
    <link:label id="lab_mdca_ShareCapitalTable_068BF4220C7127DC6548C01123D24131_terseLabel_en-US" xlink:label="lab_mdca_ShareCapitalTable_068BF4220C7127DC6548C01123D24131" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share Capital [Table]</link:label>
    <link:label id="lab_mdca_ShareCapitalTable_068BF4220C7127DC6548C01123D24131_label_en-US" xlink:label="lab_mdca_ShareCapitalTable_068BF4220C7127DC6548C01123D24131" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share Capital [Table]</link:label>
    <link:label id="lab_mdca_ShareCapitalTable_068BF4220C7127DC6548C01123D24131_documentation_en-US" xlink:label="lab_mdca_ShareCapitalTable_068BF4220C7127DC6548C01123D24131" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US" />
    <link:loc xlink:href="mdca-20200630.xsd#mdca_ShareCapitalTable" xlink:label="loc_mdca_ShareCapitalTable_068BF4220C7127DC6548C01123D24131" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_ShareCapitalTable_068BF4220C7127DC6548C01123D24131" xlink:to="lab_mdca_ShareCapitalTable_068BF4220C7127DC6548C01123D24131" xlink:type="arc" />
    <link:label id="lab_mdca_ContingentConsiderationLiabilitySettlementsDomain_8DF224F91AF5939443DBC01123D313C4_terseLabel_en-US" xlink:label="lab_mdca_ContingentConsiderationLiabilitySettlementsDomain_8DF224F91AF5939443DBC01123D313C4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Contingent Consideration, Liability Settlements [Domain]</link:label>
    <link:label id="lab_mdca_ContingentConsiderationLiabilitySettlementsDomain_8DF224F91AF5939443DBC01123D313C4_label_en-US" xlink:label="lab_mdca_ContingentConsiderationLiabilitySettlementsDomain_8DF224F91AF5939443DBC01123D313C4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contingent Consideration, Liability Settlements [Domain]</link:label>
    <link:label id="lab_mdca_ContingentConsiderationLiabilitySettlementsDomain_8DF224F91AF5939443DBC01123D313C4_documentation_en-US" xlink:label="lab_mdca_ContingentConsiderationLiabilitySettlementsDomain_8DF224F91AF5939443DBC01123D313C4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Contingent Consideration, Liability Settlements [Domain]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_ContingentConsiderationLiabilitySettlementsDomain" xlink:label="loc_mdca_ContingentConsiderationLiabilitySettlementsDomain_8DF224F91AF5939443DBC01123D313C4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_ContingentConsiderationLiabilitySettlementsDomain_8DF224F91AF5939443DBC01123D313C4" xlink:to="lab_mdca_ContingentConsiderationLiabilitySettlementsDomain_8DF224F91AF5939443DBC01123D313C4" xlink:type="arc" />
    <link:label id="lab_us-gaap_PreferredStockMember_DBE24F6E053521C15194C01123D440B7_verboseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockMember_DBE24F6E053521C15194C01123D440B7" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Preferred Stock</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockMember" xlink:label="loc_us-gaap_PreferredStockMember_DBE24F6E053521C15194C01123D440B7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PreferredStockMember_DBE24F6E053521C15194C01123D440B7" xlink:to="lab_us-gaap_PreferredStockMember_DBE24F6E053521C15194C01123D440B7" xlink:type="arc" />
    <link:label id="lab_us-gaap_AdditionalPaidInCapitalMember_702F959BED76AED96024C01123D428C2_terseLabel_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapitalMember_702F959BED76AED96024C01123D428C2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Additional Paid-in Capital</link:label>
    <link:label id="lab_us-gaap_AdditionalPaidInCapitalMember_702F959BED76AED96024C01123D428C2_label_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapitalMember_702F959BED76AED96024C01123D428C2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Additional Paid-in Capital [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_702F959BED76AED96024C01123D428C2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdditionalPaidInCapitalMember_702F959BED76AED96024C01123D428C2" xlink:to="lab_us-gaap_AdditionalPaidInCapitalMember_702F959BED76AED96024C01123D428C2" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommonStockMember_B7BE9952EDA40898E114C01123D427B5_verboseLabel_en-US" xlink:label="lab_us-gaap_CommonStockMember_B7BE9952EDA40898E114C01123D427B5" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Common Stock</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockMember" xlink:label="loc_us-gaap_CommonStockMember_B7BE9952EDA40898E114C01123D427B5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockMember_B7BE9952EDA40898E114C01123D427B5" xlink:to="lab_us-gaap_CommonStockMember_B7BE9952EDA40898E114C01123D427B5" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommonClassAMember_516F430B4D094572C1DBC01123D5F08A_verboseLabel_en-US" xlink:label="lab_us-gaap_CommonClassAMember_516F430B4D094572C1DBC01123D5F08A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Common Class A</link:label>
    <link:label id="lab_us-gaap_CommonClassAMember_516F430B4D094572C1DBC01123D5F08A_label_en-US" xlink:label="lab_us-gaap_CommonClassAMember_516F430B4D094572C1DBC01123D5F08A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Class A [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonClassAMember" xlink:label="loc_us-gaap_CommonClassAMember_516F430B4D094572C1DBC01123D5F08A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonClassAMember_516F430B4D094572C1DBC01123D5F08A" xlink:to="lab_us-gaap_CommonClassAMember_516F430B4D094572C1DBC01123D5F08A" xlink:type="arc" />
    <link:label id="lab_mdca_Series6ConvertiblePreferredSharesMember_6867D153078ACE06F224C01123D5A6F0_terseLabel_en-US" xlink:label="lab_mdca_Series6ConvertiblePreferredSharesMember_6867D153078ACE06F224C01123D5A6F0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Series 6 Convertible Preferred Stock</link:label>
    <link:label id="lab_mdca_Series6ConvertiblePreferredSharesMember_6867D153078ACE06F224C01123D5A6F0_label_en-US" xlink:label="lab_mdca_Series6ConvertiblePreferredSharesMember_6867D153078ACE06F224C01123D5A6F0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Series 6 Convertible Preferred Shares [Member]</link:label>
    <link:label id="lab_mdca_Series6ConvertiblePreferredSharesMember_6867D153078ACE06F224C01123D5A6F0_documentation_en-US" xlink:label="lab_mdca_Series6ConvertiblePreferredSharesMember_6867D153078ACE06F224C01123D5A6F0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Series 6 Convertible Preferred Shares [Member]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_Series6ConvertiblePreferredSharesMember" xlink:label="loc_mdca_Series6ConvertiblePreferredSharesMember_6867D153078ACE06F224C01123D5A6F0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_Series6ConvertiblePreferredSharesMember_6867D153078ACE06F224C01123D5A6F0" xlink:to="lab_mdca_Series6ConvertiblePreferredSharesMember_6867D153078ACE06F224C01123D5A6F0" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommonClassBMember_D8BC679E8D38AAFBFC11C01123D6F8C4_terseLabel_en-US" xlink:label="lab_us-gaap_CommonClassBMember_D8BC679E8D38AAFBFC11C01123D6F8C4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common Class B</link:label>
    <link:label id="lab_us-gaap_CommonClassBMember_D8BC679E8D38AAFBFC11C01123D6F8C4_label_en-US" xlink:label="lab_us-gaap_CommonClassBMember_D8BC679E8D38AAFBFC11C01123D6F8C4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Class B [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonClassBMember" xlink:label="loc_us-gaap_CommonClassBMember_D8BC679E8D38AAFBFC11C01123D6F8C4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonClassBMember_D8BC679E8D38AAFBFC11C01123D6F8C4" xlink:to="lab_us-gaap_CommonClassBMember_D8BC679E8D38AAFBFC11C01123D6F8C4" xlink:type="arc" />
    <link:label id="lab_mdca_ShareCapitalLineItems_EAF4AE982AC2945418D8C01123D62107_terseLabel_en-US" xlink:label="lab_mdca_ShareCapitalLineItems_EAF4AE982AC2945418D8C01123D62107" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share Capital [Line Items]</link:label>
    <link:label id="lab_mdca_ShareCapitalLineItems_EAF4AE982AC2945418D8C01123D62107_label_en-US" xlink:label="lab_mdca_ShareCapitalLineItems_EAF4AE982AC2945418D8C01123D62107" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share Capital [Line Items]</link:label>
    <link:label id="lab_mdca_ShareCapitalLineItems_EAF4AE982AC2945418D8C01123D62107_documentation_en-US" xlink:label="lab_mdca_ShareCapitalLineItems_EAF4AE982AC2945418D8C01123D62107" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US" />
    <link:loc xlink:href="mdca-20200630.xsd#mdca_ShareCapitalLineItems" xlink:label="loc_mdca_ShareCapitalLineItems_EAF4AE982AC2945418D8C01123D62107" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_ShareCapitalLineItems_EAF4AE982AC2945418D8C01123D62107" xlink:to="lab_mdca_ShareCapitalLineItems_EAF4AE982AC2945418D8C01123D62107" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesIssuedForServices_1681281108F432FBB274C01123D6C316_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesIssuedForServices_1681281108F432FBB274C01123D6C316" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Shares, Issued for Services</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesIssuedForServices_1681281108F432FBB274C01123D6C316_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesIssuedForServices_1681281108F432FBB274C01123D6C316" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Shares, Issued for Services</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesIssuedForServices" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesIssuedForServices_1681281108F432FBB274C01123D6C316" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharesIssuedForServices_1681281108F432FBB274C01123D6C316" xlink:to="lab_us-gaap_StockIssuedDuringPeriodSharesIssuedForServices_1681281108F432FBB274C01123D6C316" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfCommonStock_907D7907069329D1F157C01123D694AC_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfCommonStock_907D7907069329D1F157C01123D694AC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from Issuance of Common Stock</link:label>
    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfCommonStock_907D7907069329D1F157C01123D694AC_label_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfCommonStock_907D7907069329D1F157C01123D694AC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Issuance of Common Stock</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_907D7907069329D1F157C01123D694AC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_907D7907069329D1F157C01123D694AC" xlink:to="lab_us-gaap_ProceedsFromIssuanceOfCommonStock_907D7907069329D1F157C01123D694AC" xlink:type="arc" />
    <link:label id="lab_mdca_StockIssuedDuringPeriodSharesIssuedForServicesConvertiblePreferredShares_E07D26C70328867145E4C01123D662F5_terseLabel_en-US" xlink:label="lab_mdca_StockIssuedDuringPeriodSharesIssuedForServicesConvertiblePreferredShares_E07D26C70328867145E4C01123D662F5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Shares, Issued For Services, Convertible Preferred Shares</link:label>
    <link:label id="lab_mdca_StockIssuedDuringPeriodSharesIssuedForServicesConvertiblePreferredShares_E07D26C70328867145E4C01123D662F5_label_en-US" xlink:label="lab_mdca_StockIssuedDuringPeriodSharesIssuedForServicesConvertiblePreferredShares_E07D26C70328867145E4C01123D662F5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Shares, Issued For Services, Convertible Preferred Shares</link:label>
    <link:label id="lab_mdca_StockIssuedDuringPeriodSharesIssuedForServicesConvertiblePreferredShares_E07D26C70328867145E4C01123D662F5_documentation_en-US" xlink:label="lab_mdca_StockIssuedDuringPeriodSharesIssuedForServicesConvertiblePreferredShares_E07D26C70328867145E4C01123D662F5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Shares, Issued For Services, Convertible Preferred Shares</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_StockIssuedDuringPeriodSharesIssuedForServicesConvertiblePreferredShares" xlink:label="loc_mdca_StockIssuedDuringPeriodSharesIssuedForServicesConvertiblePreferredShares_E07D26C70328867145E4C01123D662F5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_StockIssuedDuringPeriodSharesIssuedForServicesConvertiblePreferredShares_E07D26C70328867145E4C01123D662F5" xlink:to="lab_mdca_StockIssuedDuringPeriodSharesIssuedForServicesConvertiblePreferredShares_E07D26C70328867145E4C01123D662F5" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfConvertiblePreferredStock_E1EBF4F980121A70FCC1C01123D73F37_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfConvertiblePreferredStock_E1EBF4F980121A70FCC1C01123D73F37" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from issuance of common and convertible preference shares, net of issuance costs</link:label>
    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfConvertiblePreferredStock_E1EBF4F980121A70FCC1C01123D73F37_label_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfConvertiblePreferredStock_E1EBF4F980121A70FCC1C01123D73F37" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Issuance of Convertible Preferred Stock</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromIssuanceOfConvertiblePreferredStock" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfConvertiblePreferredStock_E1EBF4F980121A70FCC1C01123D73F37" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromIssuanceOfConvertiblePreferredStock_E1EBF4F980121A70FCC1C01123D73F37" xlink:to="lab_us-gaap_ProceedsFromIssuanceOfConvertiblePreferredStock_E1EBF4F980121A70FCC1C01123D73F37" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueNewIssues_63163D5CAF4E6D5AD721C01123D70741_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueNewIssues_63163D5CAF4E6D5AD721C01123D70741" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Issuance of common and convertible preference shares</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueNewIssues_63163D5CAF4E6D5AD721C01123D70741_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueNewIssues_63163D5CAF4E6D5AD721C01123D70741" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Value, New Issues</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_63163D5CAF4E6D5AD721C01123D70741" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_63163D5CAF4E6D5AD721C01123D70741" xlink:to="lab_us-gaap_StockIssuedDuringPeriodValueNewIssues_63163D5CAF4E6D5AD721C01123D70741" xlink:type="arc" />
    <link:label id="lab_us-gaap_PreferredStockLiquidationPreference_F753D362638B7F56F4C5C01123D7227E_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockLiquidationPreference_F753D362638B7F56F4C5C01123D7227E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Preferred Stock, Liquidation Preference Per Share</link:label>
    <link:label id="lab_us-gaap_PreferredStockLiquidationPreference_F753D362638B7F56F4C5C01123D7227E_label_en-US" xlink:label="lab_us-gaap_PreferredStockLiquidationPreference_F753D362638B7F56F4C5C01123D7227E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Preferred Stock, Liquidation Preference Per Share</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockLiquidationPreference" xlink:label="loc_us-gaap_PreferredStockLiquidationPreference_F753D362638B7F56F4C5C01123D7227E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PreferredStockLiquidationPreference_F753D362638B7F56F4C5C01123D7227E" xlink:to="lab_us-gaap_PreferredStockLiquidationPreference_F753D362638B7F56F4C5C01123D7227E" xlink:type="arc" />
    <link:label id="lab_mdca_PreferredStockConversionPriceperVotingShare_0D9DFA0686F679E2BEFAC01123D7258D_terseLabel_en-US" xlink:label="lab_mdca_PreferredStockConversionPriceperVotingShare_0D9DFA0686F679E2BEFAC01123D7258D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Preferred Stock, Conversion Price Per Preference Share</link:label>
    <link:label id="lab_mdca_PreferredStockConversionPriceperVotingShare_0D9DFA0686F679E2BEFAC01123D7258D_label_en-US" xlink:label="lab_mdca_PreferredStockConversionPriceperVotingShare_0D9DFA0686F679E2BEFAC01123D7258D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Preferred Stock, Conversion Price per Voting Share</link:label>
    <link:label id="lab_mdca_PreferredStockConversionPriceperVotingShare_0D9DFA0686F679E2BEFAC01123D7258D_documentation_en-US" xlink:label="lab_mdca_PreferredStockConversionPriceperVotingShare_0D9DFA0686F679E2BEFAC01123D7258D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Preferred Stock, Conversion Price per Voting Share</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_PreferredStockConversionPriceperVotingShare" xlink:label="loc_mdca_PreferredStockConversionPriceperVotingShare_0D9DFA0686F679E2BEFAC01123D7258D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_PreferredStockConversionPriceperVotingShare_0D9DFA0686F679E2BEFAC01123D7258D" xlink:to="lab_mdca_PreferredStockConversionPriceperVotingShare_0D9DFA0686F679E2BEFAC01123D7258D" xlink:type="arc" />
    <link:label id="lab_mdca_PreferredStockAccretionPercentagePreference_3CD680983E5A5B629745C01123D8CF20_terseLabel_en-US" xlink:label="lab_mdca_PreferredStockAccretionPercentagePreference_3CD680983E5A5B629745C01123D8CF20" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Preferred Stock, Accretion Percentage, Preference</link:label>
    <link:label id="lab_mdca_PreferredStockAccretionPercentagePreference_3CD680983E5A5B629745C01123D8CF20_label_en-US" xlink:label="lab_mdca_PreferredStockAccretionPercentagePreference_3CD680983E5A5B629745C01123D8CF20" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Preferred Stock, Accretion Percentage, Preference</link:label>
    <link:label id="lab_mdca_PreferredStockAccretionPercentagePreference_3CD680983E5A5B629745C01123D8CF20_documentation_en-US" xlink:label="lab_mdca_PreferredStockAccretionPercentagePreference_3CD680983E5A5B629745C01123D8CF20" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Preferred Stock, Accretion Percentage, Preference</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_PreferredStockAccretionPercentagePreference" xlink:label="loc_mdca_PreferredStockAccretionPercentagePreference_3CD680983E5A5B629745C01123D8CF20" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_PreferredStockAccretionPercentagePreference_3CD680983E5A5B629745C01123D8CF20" xlink:to="lab_mdca_PreferredStockAccretionPercentagePreference_3CD680983E5A5B629745C01123D8CF20" xlink:type="arc" />
    <link:label id="lab_mdca_PreferredStockAccretionRatePreferencePerShare_49881130031251083FEEC01123D8334D_terseLabel_en-US" xlink:label="lab_mdca_PreferredStockAccretionRatePreferencePerShare_49881130031251083FEEC01123D8334D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Preferred Stock, Accretion Rate, Preference Per Share</link:label>
    <link:label id="lab_mdca_PreferredStockAccretionRatePreferencePerShare_49881130031251083FEEC01123D8334D_label_en-US" xlink:label="lab_mdca_PreferredStockAccretionRatePreferencePerShare_49881130031251083FEEC01123D8334D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Preferred Stock, Accretion Rate, Preference Per Share</link:label>
    <link:label id="lab_mdca_PreferredStockAccretionRatePreferencePerShare_49881130031251083FEEC01123D8334D_documentation_en-US" xlink:label="lab_mdca_PreferredStockAccretionRatePreferencePerShare_49881130031251083FEEC01123D8334D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Preferred Stock, Accretion Rate, Preference Per Share</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_PreferredStockAccretionRatePreferencePerShare" xlink:label="loc_mdca_PreferredStockAccretionRatePreferencePerShare_49881130031251083FEEC01123D8334D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_PreferredStockAccretionRatePreferencePerShare_49881130031251083FEEC01123D8334D" xlink:to="lab_mdca_PreferredStockAccretionRatePreferencePerShare_49881130031251083FEEC01123D8334D" xlink:type="arc" />
    <link:label id="lab_mdca_PreferredStockConvertiblePreferenceSharesAccretionPeriod_09A8FAD7C197E0546B4AC01123D8DCC2_terseLabel_en-US" xlink:label="lab_mdca_PreferredStockConvertiblePreferenceSharesAccretionPeriod_09A8FAD7C197E0546B4AC01123D8DCC2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Preferred Stock, Convertible Preference Shares, Accretion Period</link:label>
    <link:label id="lab_mdca_PreferredStockConvertiblePreferenceSharesAccretionPeriod_09A8FAD7C197E0546B4AC01123D8DCC2_label_en-US" xlink:label="lab_mdca_PreferredStockConvertiblePreferenceSharesAccretionPeriod_09A8FAD7C197E0546B4AC01123D8DCC2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Preferred Stock, Convertible Preference Shares, Accretion Period</link:label>
    <link:label id="lab_mdca_PreferredStockConvertiblePreferenceSharesAccretionPeriod_09A8FAD7C197E0546B4AC01123D8DCC2_documentation_en-US" xlink:label="lab_mdca_PreferredStockConvertiblePreferenceSharesAccretionPeriod_09A8FAD7C197E0546B4AC01123D8DCC2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Preferred Stock, Convertible Preference Shares, Accretion Period</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_PreferredStockConvertiblePreferenceSharesAccretionPeriod" xlink:label="loc_mdca_PreferredStockConvertiblePreferenceSharesAccretionPeriod_09A8FAD7C197E0546B4AC01123D8DCC2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_PreferredStockConvertiblePreferenceSharesAccretionPeriod_09A8FAD7C197E0546B4AC01123D8DCC2" xlink:to="lab_mdca_PreferredStockConvertiblePreferenceSharesAccretionPeriod_09A8FAD7C197E0546B4AC01123D8DCC2" xlink:type="arc" />
    <link:label id="lab_mdca_PreferredStockMonthlyAccretionofRedemptionDiscount_635565724528DCFDD3C2C01123D8029B_terseLabel_en-US" xlink:label="lab_mdca_PreferredStockMonthlyAccretionofRedemptionDiscount_635565724528DCFDD3C2C01123D8029B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Preferred Stock, Monthly Accretion of Redemption Discount</link:label>
    <link:label id="lab_mdca_PreferredStockMonthlyAccretionofRedemptionDiscount_635565724528DCFDD3C2C01123D8029B_label_en-US" xlink:label="lab_mdca_PreferredStockMonthlyAccretionofRedemptionDiscount_635565724528DCFDD3C2C01123D8029B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Preferred Stock, Monthly Accretion of Redemption Discount</link:label>
    <link:label id="lab_mdca_PreferredStockMonthlyAccretionofRedemptionDiscount_635565724528DCFDD3C2C01123D8029B_documentation_en-US" xlink:label="lab_mdca_PreferredStockMonthlyAccretionofRedemptionDiscount_635565724528DCFDD3C2C01123D8029B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Preferred Stock, Monthly Accretion of Redemption Discount</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_PreferredStockMonthlyAccretionofRedemptionDiscount" xlink:label="loc_mdca_PreferredStockMonthlyAccretionofRedemptionDiscount_635565724528DCFDD3C2C01123D8029B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_PreferredStockMonthlyAccretionofRedemptionDiscount_635565724528DCFDD3C2C01123D8029B" xlink:to="lab_mdca_PreferredStockMonthlyAccretionofRedemptionDiscount_635565724528DCFDD3C2C01123D8029B" xlink:type="arc" />
    <link:label id="lab_us-gaap_PreferredStockAccretionOfRedemptionDiscount_AF84BD7C195ED91F8946C01123D85506_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockAccretionOfRedemptionDiscount_AF84BD7C195ED91F8946C01123D85506" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Preferred Stock, Accretion of Redemption Discount</link:label>
    <link:label id="lab_us-gaap_PreferredStockAccretionOfRedemptionDiscount_AF84BD7C195ED91F8946C01123D85506_label_en-US" xlink:label="lab_us-gaap_PreferredStockAccretionOfRedemptionDiscount_AF84BD7C195ED91F8946C01123D85506" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Preferred Stock, Accretion of Redemption Discount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockAccretionOfRedemptionDiscount" xlink:label="loc_us-gaap_PreferredStockAccretionOfRedemptionDiscount_AF84BD7C195ED91F8946C01123D85506" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PreferredStockAccretionOfRedemptionDiscount_AF84BD7C195ED91F8946C01123D85506" xlink:to="lab_us-gaap_PreferredStockAccretionOfRedemptionDiscount_AF84BD7C195ED91F8946C01123D85506" xlink:type="arc" />
    <link:label id="lab_us-gaap_PreferredStockLiquidationPreferenceValue_66373DEFDCA2D5D96926C01123D821A9_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockLiquidationPreferenceValue_66373DEFDCA2D5D96926C01123D821A9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Preferred Stock, Liquidation Preference, Value</link:label>
    <link:label id="lab_us-gaap_PreferredStockLiquidationPreferenceValue_66373DEFDCA2D5D96926C01123D821A9_label_en-US" xlink:label="lab_us-gaap_PreferredStockLiquidationPreferenceValue_66373DEFDCA2D5D96926C01123D821A9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Preferred Stock, Liquidation Preference, Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockLiquidationPreferenceValue" xlink:label="loc_us-gaap_PreferredStockLiquidationPreferenceValue_66373DEFDCA2D5D96926C01123D821A9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PreferredStockLiquidationPreferenceValue_66373DEFDCA2D5D96926C01123D821A9" xlink:to="lab_us-gaap_PreferredStockLiquidationPreferenceValue_66373DEFDCA2D5D96926C01123D821A9" xlink:type="arc" />
    <link:label id="lab_mdca_PreferredStockConvertiblePreferenceSharesConvertibleatCompanysOptionTerm_6523192EBC156247040EC01123D83E1F_terseLabel_en-US" xlink:label="lab_mdca_PreferredStockConvertiblePreferenceSharesConvertibleatCompanysOptionTerm_6523192EBC156247040EC01123D83E1F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Preferred Stock, Convertible Preference Shares, Convertible at Company's Option, Term</link:label>
    <link:label id="lab_mdca_PreferredStockConvertiblePreferenceSharesConvertibleatCompanysOptionTerm_6523192EBC156247040EC01123D83E1F_label_en-US" xlink:label="lab_mdca_PreferredStockConvertiblePreferenceSharesConvertibleatCompanysOptionTerm_6523192EBC156247040EC01123D83E1F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Preferred Stock, Convertible Preference Shares, Convertible at Company's Option, Term</link:label>
    <link:label id="lab_mdca_PreferredStockConvertiblePreferenceSharesConvertibleatCompanysOptionTerm_6523192EBC156247040EC01123D83E1F_documentation_en-US" xlink:label="lab_mdca_PreferredStockConvertiblePreferenceSharesConvertibleatCompanysOptionTerm_6523192EBC156247040EC01123D83E1F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Preferred Stock, Convertible Preference Shares, Convertible at Company's Option, Term</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_PreferredStockConvertiblePreferenceSharesConvertibleatCompanysOptionTerm" xlink:label="loc_mdca_PreferredStockConvertiblePreferenceSharesConvertibleatCompanysOptionTerm_6523192EBC156247040EC01123D83E1F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_PreferredStockConvertiblePreferenceSharesConvertibleatCompanysOptionTerm_6523192EBC156247040EC01123D83E1F" xlink:to="lab_mdca_PreferredStockConvertiblePreferenceSharesConvertibleatCompanysOptionTerm_6523192EBC156247040EC01123D83E1F" xlink:type="arc" />
    <link:label id="lab_mdca_CommonStockVotingRightsNumberofVotesperShare_5AC93440A55F6FE1341AC01123D97260_terseLabel_en-US" xlink:label="lab_mdca_CommonStockVotingRightsNumberofVotesperShare_5AC93440A55F6FE1341AC01123D97260" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common stock, voting rights, number of votes per share</link:label>
    <link:label id="lab_mdca_CommonStockVotingRightsNumberofVotesperShare_5AC93440A55F6FE1341AC01123D97260_label_en-US" xlink:label="lab_mdca_CommonStockVotingRightsNumberofVotesperShare_5AC93440A55F6FE1341AC01123D97260" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock, Voting Rights, Number of Votes per Share</link:label>
    <link:label id="lab_mdca_CommonStockVotingRightsNumberofVotesperShare_5AC93440A55F6FE1341AC01123D97260_documentation_en-US" xlink:label="lab_mdca_CommonStockVotingRightsNumberofVotesperShare_5AC93440A55F6FE1341AC01123D97260" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Common Stock, Voting Rights, Number of Votes per Share</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_CommonStockVotingRightsNumberofVotesperShare" xlink:label="loc_mdca_CommonStockVotingRightsNumberofVotesperShare_5AC93440A55F6FE1341AC01123D97260" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_CommonStockVotingRightsNumberofVotesperShare_5AC93440A55F6FE1341AC01123D97260" xlink:to="lab_mdca_CommonStockVotingRightsNumberofVotesperShare_5AC93440A55F6FE1341AC01123D97260" xlink:type="arc" />
    <link:label id="lab_mdca_PreferredStockConversionBasisCommonStockClassAClosingTradePrice_2A59D92E2A3EF6287B65C01123D9691E_terseLabel_en-US" xlink:label="lab_mdca_PreferredStockConversionBasisCommonStockClassAClosingTradePrice_2A59D92E2A3EF6287B65C01123D9691E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Preferred Stock, Conversion Basis, Common Stock Class A Closing Trade Price</link:label>
    <link:label id="lab_mdca_PreferredStockConversionBasisCommonStockClassAClosingTradePrice_2A59D92E2A3EF6287B65C01123D9691E_label_en-US" xlink:label="lab_mdca_PreferredStockConversionBasisCommonStockClassAClosingTradePrice_2A59D92E2A3EF6287B65C01123D9691E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Preferred Stock, Conversion Basis, Common Stock Class A Closing Trade Price</link:label>
    <link:label id="lab_mdca_PreferredStockConversionBasisCommonStockClassAClosingTradePrice_2A59D92E2A3EF6287B65C01123D9691E_documentation_en-US" xlink:label="lab_mdca_PreferredStockConversionBasisCommonStockClassAClosingTradePrice_2A59D92E2A3EF6287B65C01123D9691E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Preferred Stock, Conversion Basis, Common Stock Class A Closing Trade Price</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_PreferredStockConversionBasisCommonStockClassAClosingTradePrice" xlink:label="loc_mdca_PreferredStockConversionBasisCommonStockClassAClosingTradePrice_2A59D92E2A3EF6287B65C01123D9691E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_PreferredStockConversionBasisCommonStockClassAClosingTradePrice_2A59D92E2A3EF6287B65C01123D9691E" xlink:to="lab_mdca_PreferredStockConversionBasisCommonStockClassAClosingTradePrice_2A59D92E2A3EF6287B65C01123D9691E" xlink:type="arc" />
    <link:label id="lab_mdca_PreferredStockLiquidationPreferencePercentageRateChangeofControloftheCompany_AF4D6857768C95F5DB57C01123D92F0A_terseLabel_en-US" xlink:label="lab_mdca_PreferredStockLiquidationPreferencePercentageRateChangeofControloftheCompany_AF4D6857768C95F5DB57C01123D92F0A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Preferred Stock, Liquidation Preference Percentage Rate, Change of Control of the Company</link:label>
    <link:label id="lab_mdca_PreferredStockLiquidationPreferencePercentageRateChangeofControloftheCompany_AF4D6857768C95F5DB57C01123D92F0A_label_en-US" xlink:label="lab_mdca_PreferredStockLiquidationPreferencePercentageRateChangeofControloftheCompany_AF4D6857768C95F5DB57C01123D92F0A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Preferred Stock, Liquidation Preference Percentage Rate, Change of Control of the Company</link:label>
    <link:label id="lab_mdca_PreferredStockLiquidationPreferencePercentageRateChangeofControloftheCompany_AF4D6857768C95F5DB57C01123D92F0A_documentation_en-US" xlink:label="lab_mdca_PreferredStockLiquidationPreferencePercentageRateChangeofControloftheCompany_AF4D6857768C95F5DB57C01123D92F0A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Preferred Stock, Liquidation Preference Percentage Rate, Change of Control of the Company</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_PreferredStockLiquidationPreferencePercentageRateChangeofControloftheCompany" xlink:label="loc_mdca_PreferredStockLiquidationPreferencePercentageRateChangeofControloftheCompany_AF4D6857768C95F5DB57C01123D92F0A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_PreferredStockLiquidationPreferencePercentageRateChangeofControloftheCompany_AF4D6857768C95F5DB57C01123D92F0A" xlink:to="lab_mdca_PreferredStockLiquidationPreferencePercentageRateChangeofControloftheCompany_AF4D6857768C95F5DB57C01123D92F0A" xlink:type="arc" />
    <link:label id="lab_us-gaap_PreferredStockDividendRatePercentage_11E072A3FD5508C1B0BFC01123D97229_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockDividendRatePercentage_11E072A3FD5508C1B0BFC01123D97229" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Preferred Stock, Dividend Rate, Percentage</link:label>
    <link:label id="lab_us-gaap_PreferredStockDividendRatePercentage_11E072A3FD5508C1B0BFC01123D97229_label_en-US" xlink:label="lab_us-gaap_PreferredStockDividendRatePercentage_11E072A3FD5508C1B0BFC01123D97229" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Preferred Stock, Dividend Rate, Percentage</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockDividendRatePercentage" xlink:label="loc_us-gaap_PreferredStockDividendRatePercentage_11E072A3FD5508C1B0BFC01123D97229" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PreferredStockDividendRatePercentage_11E072A3FD5508C1B0BFC01123D97229" xlink:to="lab_us-gaap_PreferredStockDividendRatePercentage_11E072A3FD5508C1B0BFC01123D97229" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtDisclosureAbstract_6E3770A367D548DFA1D4C011241350BF_label_en-US" xlink:label="lab_us-gaap_DebtDisclosureAbstract_6E3770A367D548DFA1D4C011241350BF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Disclosure [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="loc_us-gaap_DebtDisclosureAbstract_6E3770A367D548DFA1D4C011241350BF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtDisclosureAbstract_6E3770A367D548DFA1D4C011241350BF" xlink:to="lab_us-gaap_DebtDisclosureAbstract_6E3770A367D548DFA1D4C011241350BF" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfDebtTableTextBlock_2FD8672D53C460037AE0C01124138A5A_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfDebtTableTextBlock_2FD8672D53C460037AE0C01124138A5A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Debt</link:label>
    <link:label id="lab_us-gaap_ScheduleOfDebtTableTextBlock_2FD8672D53C460037AE0C01124138A5A_label_en-US" xlink:label="lab_us-gaap_ScheduleOfDebtTableTextBlock_2FD8672D53C460037AE0C01124138A5A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Debt [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfDebtTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfDebtTableTextBlock_2FD8672D53C460037AE0C01124138A5A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfDebtTableTextBlock_2FD8672D53C460037AE0C01124138A5A" xlink:to="lab_us-gaap_ScheduleOfDebtTableTextBlock_2FD8672D53C460037AE0C01124138A5A" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessCombinationDisclosureTextBlock_F5E5E6E9869B96968F05C01124379599_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationDisclosureTextBlock_F5E5E6E9869B96968F05C01124379599" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred Acquisition Consideration</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationDisclosureTextBlock" xlink:label="loc_us-gaap_BusinessCombinationDisclosureTextBlock_F5E5E6E9869B96968F05C01124379599" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessCombinationDisclosureTextBlock_F5E5E6E9869B96968F05C01124379599" xlink:to="lab_us-gaap_BusinessCombinationDisclosureTextBlock_F5E5E6E9869B96968F05C01124379599" xlink:type="arc" />
    <link:label id="lab_us-gaap_ContingentConsiderationByTypeAxis_08B95017F12ADD9A9454C011242EB25D_terseLabel_en-US" xlink:label="lab_us-gaap_ContingentConsiderationByTypeAxis_08B95017F12ADD9A9454C011242EB25D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Contingent Consideration by Type [Axis]</link:label>
    <link:label id="lab_us-gaap_ContingentConsiderationByTypeAxis_08B95017F12ADD9A9454C011242EB25D_label_en-US" xlink:label="lab_us-gaap_ContingentConsiderationByTypeAxis_08B95017F12ADD9A9454C011242EB25D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contingent Consideration by Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ContingentConsiderationByTypeAxis" xlink:label="loc_us-gaap_ContingentConsiderationByTypeAxis_08B95017F12ADD9A9454C011242EB25D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContingentConsiderationByTypeAxis_08B95017F12ADD9A9454C011242EB25D" xlink:to="lab_us-gaap_ContingentConsiderationByTypeAxis_08B95017F12ADD9A9454C011242EB25D" xlink:type="arc" />
    <link:label id="lab_us-gaap_ContingentConsiderationTypeDomain_52C4CF6552A006D4E6B2C011242E632E_terseLabel_en-US" xlink:label="lab_us-gaap_ContingentConsiderationTypeDomain_52C4CF6552A006D4E6B2C011242E632E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Contingent Consideration Type [Domain]</link:label>
    <link:label id="lab_us-gaap_ContingentConsiderationTypeDomain_52C4CF6552A006D4E6B2C011242E632E_label_en-US" xlink:label="lab_us-gaap_ContingentConsiderationTypeDomain_52C4CF6552A006D4E6B2C011242E632E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contingent Consideration Type [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ContingentConsiderationTypeDomain" xlink:label="loc_us-gaap_ContingentConsiderationTypeDomain_52C4CF6552A006D4E6B2C011242E632E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContingentConsiderationTypeDomain_52C4CF6552A006D4E6B2C011242E632E" xlink:to="lab_us-gaap_ContingentConsiderationTypeDomain_52C4CF6552A006D4E6B2C011242E632E" xlink:type="arc" />
    <link:label id="lab_mdca_FixedpaymentsMember_EA71EBB57638150DCC58C011242FEE44_terseLabel_en-US" xlink:label="lab_mdca_FixedpaymentsMember_EA71EBB57638150DCC58C011242FEE44" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fixed payments</link:label>
    <link:label id="lab_mdca_FixedpaymentsMember_EA71EBB57638150DCC58C011242FEE44_label_en-US" xlink:label="lab_mdca_FixedpaymentsMember_EA71EBB57638150DCC58C011242FEE44" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fixed payments [Member]</link:label>
    <link:label id="lab_mdca_FixedpaymentsMember_EA71EBB57638150DCC58C011242FEE44_documentation_en-US" xlink:label="lab_mdca_FixedpaymentsMember_EA71EBB57638150DCC58C011242FEE44" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Fixed payments [Member]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_FixedpaymentsMember" xlink:label="loc_mdca_FixedpaymentsMember_EA71EBB57638150DCC58C011242FEE44" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_FixedpaymentsMember_EA71EBB57638150DCC58C011242FEE44" xlink:to="lab_mdca_FixedpaymentsMember_EA71EBB57638150DCC58C011242FEE44" xlink:type="arc" />
    <link:label id="lab_mdca_ContingentPaymentMember_16225A422CB63CB1B752C011242FD8D0_terseLabel_en-US" xlink:label="lab_mdca_ContingentPaymentMember_16225A422CB63CB1B752C011242FD8D0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Contingent Payment</link:label>
    <link:label id="lab_mdca_ContingentPaymentMember_16225A422CB63CB1B752C011242FD8D0_label_en-US" xlink:label="lab_mdca_ContingentPaymentMember_16225A422CB63CB1B752C011242FD8D0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contingent Payment [Member]</link:label>
    <link:label id="lab_mdca_ContingentPaymentMember_16225A422CB63CB1B752C011242FD8D0_documentation_en-US" xlink:label="lab_mdca_ContingentPaymentMember_16225A422CB63CB1B752C011242FD8D0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Additional contingent purchase price obligations that are based on the achievement of specific thresholds of future earnings of the acquired entity, and, in certain cases, the growth rate of those earnings.</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_ContingentPaymentMember" xlink:label="loc_mdca_ContingentPaymentMember_16225A422CB63CB1B752C011242FD8D0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_ContingentPaymentMember_16225A422CB63CB1B752C011242FD8D0" xlink:to="lab_mdca_ContingentPaymentMember_16225A422CB63CB1B752C011242FD8D0" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_3A1134B2252CA2EAE37CC011242F03FE_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_3A1134B2252CA2EAE37CC011242F03FE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]</link:label>
    <link:label id="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_3A1134B2252CA2EAE37CC011242F03FE_label_en-US" xlink:label="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_3A1134B2252CA2EAE37CC011242F03FE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_3A1134B2252CA2EAE37CC011242F03FE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_3A1134B2252CA2EAE37CC011242F03FE" xlink:to="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_3A1134B2252CA2EAE37CC011242F03FE" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_DB22623FAEE0765A7A44C011242F5CDC_periodStartLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_DB22623FAEE0765A7A44C011242F5CDC" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Beginning balance of contingent payments</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_DB22623FAEE0765A7A44C011242F5CDC_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_DB22623FAEE0765A7A44C011242F5CDC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_DB22623FAEE0765A7A44C011242F5CDC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_DB22623FAEE0765A7A44C011242F5CDC" xlink:to="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_DB22623FAEE0765A7A44C011242F5CDC" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements_292F420D3A72E8A59FE9C01124304C29_negatedLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements_292F420D3A72E8A59FE9C01124304C29" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Payments</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements_292F420D3A72E8A59FE9C01124304C29_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements_292F420D3A72E8A59FE9C01124304C29" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements_292F420D3A72E8A59FE9C01124304C29" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements_292F420D3A72E8A59FE9C01124304C29" xlink:to="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements_292F420D3A72E8A59FE9C01124304C29" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_4A506BD3DF284ACCA5B8C0112430CEB4_verboseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_4A506BD3DF284ACCA5B8C0112430CEB4" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Redemption value adjustments</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_4A506BD3DF284ACCA5B8C0112430CEB4_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_4A506BD3DF284ACCA5B8C0112430CEB4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_4A506BD3DF284ACCA5B8C0112430CEB4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_4A506BD3DF284ACCA5B8C0112430CEB4" xlink:to="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_4A506BD3DF284ACCA5B8C0112430CEB4" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases_D674246F7207D56AA18BC011243071F8_verboseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases_D674246F7207D56AA18BC011243071F8" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Additions</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases_D674246F7207D56AA18BC011243071F8_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases_D674246F7207D56AA18BC011243071F8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases_D674246F7207D56AA18BC011243071F8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases_D674246F7207D56AA18BC011243071F8" xlink:to="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases_D674246F7207D56AA18BC011243071F8" xlink:type="arc" />
    <link:label id="lab_mdca_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityForeignCurrencyTranslationAdjustment_5B4361943DAB99F53078C011243095B2_verboseLabel_en-US" xlink:label="lab_mdca_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityForeignCurrencyTranslationAdjustment_5B4361943DAB99F53078C011243095B2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Foreign translation adjustment</link:label>
    <link:label id="lab_mdca_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityForeignCurrencyTranslationAdjustment_5B4361943DAB99F53078C011243095B2_label_en-US" xlink:label="lab_mdca_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityForeignCurrencyTranslationAdjustment_5B4361943DAB99F53078C011243095B2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Foreign Currency Translation Adjustment</link:label>
    <link:label id="lab_mdca_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityForeignCurrencyTranslationAdjustment_5B4361943DAB99F53078C011243095B2_documentation_en-US" xlink:label="lab_mdca_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityForeignCurrencyTranslationAdjustment_5B4361943DAB99F53078C011243095B2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount of foreign currency translation adjustment arising from liabilities measured at fair value on a recurring basis using unobservable inputs (level 3).</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityForeignCurrencyTranslationAdjustment" xlink:label="loc_mdca_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityForeignCurrencyTranslationAdjustment_5B4361943DAB99F53078C011243095B2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityForeignCurrencyTranslationAdjustment_5B4361943DAB99F53078C011243095B2" xlink:to="lab_mdca_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityForeignCurrencyTranslationAdjustment_5B4361943DAB99F53078C011243095B2" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_8E3652E6CD2F6A47EBF8C01124308A8F_periodEndLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_8E3652E6CD2F6A47EBF8C01124308A8F" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Ending balance of contingent payments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_8E3652E6CD2F6A47EBF8C01124308A8F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_8E3652E6CD2F6A47EBF8C01124308A8F" xlink:to="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_8E3652E6CD2F6A47EBF8C01124308A8F" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_B9674A917CA999D552E7C01124319280_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_B9674A917CA999D552E7C01124319280" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loss (Income) attributable to fair value adjustments</link:label>
    <link:label id="lab_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_B9674A917CA999D552E7C01124319280_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_B9674A917CA999D552E7C01124319280" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_B9674A917CA999D552E7C01124319280" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_B9674A917CA999D552E7C01124319280" xlink:to="lab_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_B9674A917CA999D552E7C01124319280" xlink:type="arc" />
    <link:label id="lab_mdca_Adjustmentstodeferredacquisitionconsiderationincludedinsharebasedcompensation_972977E8A7FC64D06143C0112431C16E_terseLabel_en-US" xlink:label="lab_mdca_Adjustmentstodeferredacquisitionconsiderationincludedinsharebasedcompensation_972977E8A7FC64D06143C0112431C16E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock-based compensation</link:label>
    <link:label id="lab_mdca_Adjustmentstodeferredacquisitionconsiderationincludedinsharebasedcompensation_972977E8A7FC64D06143C0112431C16E_label_en-US" xlink:label="lab_mdca_Adjustmentstodeferredacquisitionconsiderationincludedinsharebasedcompensation_972977E8A7FC64D06143C0112431C16E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustments to deferred acquisition consideration included in share-based compensation</link:label>
    <link:label id="lab_mdca_Adjustmentstodeferredacquisitionconsiderationincludedinsharebasedcompensation_972977E8A7FC64D06143C0112431C16E_documentation_en-US" xlink:label="lab_mdca_Adjustmentstodeferredacquisitionconsiderationincludedinsharebasedcompensation_972977E8A7FC64D06143C0112431C16E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Adjustments to deferred acquisition consideration included in share-based compensation</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_Adjustmentstodeferredacquisitionconsiderationincludedinsharebasedcompensation" xlink:label="loc_mdca_Adjustmentstodeferredacquisitionconsiderationincludedinsharebasedcompensation_972977E8A7FC64D06143C0112431C16E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_Adjustmentstodeferredacquisitionconsiderationincludedinsharebasedcompensation_972977E8A7FC64D06143C0112431C16E" xlink:to="lab_mdca_Adjustmentstodeferredacquisitionconsiderationincludedinsharebasedcompensation_972977E8A7FC64D06143C0112431C16E" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_59A901275BD69752AF95C01123E3E033_label_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_59A901275BD69752AF95C01123E3E033" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Commitments and Contingencies Disclosure [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_59A901275BD69752AF95C01123E3E033" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_59A901275BD69752AF95C01123E3E033" xlink:to="lab_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_59A901275BD69752AF95C01123E3E033" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommitmentsContingenciesAndGuaranteesTextBlock_C62638833E9802DF0DC6C01123E34390_verboseLabel_en-US" xlink:label="lab_us-gaap_CommitmentsContingenciesAndGuaranteesTextBlock_C62638833E9802DF0DC6C01123E34390" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Commitments, Contingencies and Guarantees</link:label>
    <link:label id="lab_us-gaap_CommitmentsContingenciesAndGuaranteesTextBlock_C62638833E9802DF0DC6C01123E34390_label_en-US" xlink:label="lab_us-gaap_CommitmentsContingenciesAndGuaranteesTextBlock_C62638833E9802DF0DC6C01123E34390" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Commitments Contingencies and Guarantees [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommitmentsContingenciesAndGuaranteesTextBlock" xlink:label="loc_us-gaap_CommitmentsContingenciesAndGuaranteesTextBlock_C62638833E9802DF0DC6C01123E34390" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommitmentsContingenciesAndGuaranteesTextBlock_C62638833E9802DF0DC6C01123E34390" xlink:to="lab_us-gaap_CommitmentsContingenciesAndGuaranteesTextBlock_C62638833E9802DF0DC6C01123E34390" xlink:type="arc" />
    <link:label id="lab_mdca_DebtTable_6FF3359A3D992384567BC011240F7F44_terseLabel_en-US" xlink:label="lab_mdca_DebtTable_6FF3359A3D992384567BC011240F7F44" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt [Table]</link:label>
    <link:label id="lab_mdca_DebtTable_6FF3359A3D992384567BC011240F7F44_label_en-US" xlink:label="lab_mdca_DebtTable_6FF3359A3D992384567BC011240F7F44" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt [Table]</link:label>
    <link:label id="lab_mdca_DebtTable_6FF3359A3D992384567BC011240F7F44_documentation_en-US" xlink:label="lab_mdca_DebtTable_6FF3359A3D992384567BC011240F7F44" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US" />
    <link:loc xlink:href="mdca-20200630.xsd#mdca_DebtTable" xlink:label="loc_mdca_DebtTable_6FF3359A3D992384567BC011240F7F44" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_DebtTable_6FF3359A3D992384567BC011240F7F44" xlink:to="lab_mdca_DebtTable_6FF3359A3D992384567BC011240F7F44" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentAxis_0BED96674EB553230254C011240F3B9C_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentAxis_0BED96674EB553230254C011240F3B9C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument [Axis]</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentAxis_0BED96674EB553230254C011240F3B9C_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentAxis_0BED96674EB553230254C011240F3B9C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_0BED96674EB553230254C011240F3B9C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentAxis_0BED96674EB553230254C011240F3B9C" xlink:to="lab_us-gaap_DebtInstrumentAxis_0BED96674EB553230254C011240F3B9C" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentNameDomain_ACAB23A59F2428B05056C01124105D52_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentNameDomain_ACAB23A59F2428B05056C01124105D52" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Name [Domain]</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentNameDomain_ACAB23A59F2428B05056C01124105D52_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentNameDomain_ACAB23A59F2428B05056C01124105D52" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Name [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_ACAB23A59F2428B05056C01124105D52" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_ACAB23A59F2428B05056C01124105D52" xlink:to="lab_us-gaap_DebtInstrumentNameDomain_ACAB23A59F2428B05056C01124105D52" xlink:type="arc" />
    <link:label id="lab_mdca_A6.50Notesdue2024Member_FF6D4E3AC0CD6E08D052C01124109FC6_terseLabel_en-US" xlink:label="lab_mdca_A6.50Notesdue2024Member_FF6D4E3AC0CD6E08D052C01124109FC6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">6.50% Notes due 2024</link:label>
    <link:label id="lab_mdca_A6.50Notesdue2024Member_FF6D4E3AC0CD6E08D052C01124109FC6_label_en-US" xlink:label="lab_mdca_A6.50Notesdue2024Member_FF6D4E3AC0CD6E08D052C01124109FC6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">6.50% Notes due 2024 [Member]</link:label>
    <link:label id="lab_mdca_A6.50Notesdue2024Member_FF6D4E3AC0CD6E08D052C01124109FC6_documentation_en-US" xlink:label="lab_mdca_A6.50Notesdue2024Member_FF6D4E3AC0CD6E08D052C01124109FC6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">6.50% Notes due 2024 [Member]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_A6.50Notesdue2024Member" xlink:label="loc_mdca_A6.50Notesdue2024Member_FF6D4E3AC0CD6E08D052C01124109FC6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_A6.50Notesdue2024Member_FF6D4E3AC0CD6E08D052C01124109FC6" xlink:to="lab_mdca_A6.50Notesdue2024Member_FF6D4E3AC0CD6E08D052C01124109FC6" xlink:type="arc" />
    <link:label id="lab_mdca_DebtLineItems_C8AEACEBBACE9E712BD2C0112410EE99_terseLabel_en-US" xlink:label="lab_mdca_DebtLineItems_C8AEACEBBACE9E712BD2C0112410EE99" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt [Line Items]</link:label>
    <link:label id="lab_mdca_DebtLineItems_C8AEACEBBACE9E712BD2C0112410EE99_label_en-US" xlink:label="lab_mdca_DebtLineItems_C8AEACEBBACE9E712BD2C0112410EE99" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt [Line Items]</link:label>
    <link:label id="lab_mdca_DebtLineItems_C8AEACEBBACE9E712BD2C0112410EE99_documentation_en-US" xlink:label="lab_mdca_DebtLineItems_C8AEACEBBACE9E712BD2C0112410EE99" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US" />
    <link:loc xlink:href="mdca-20200630.xsd#mdca_DebtLineItems" xlink:label="loc_mdca_DebtLineItems_C8AEACEBBACE9E712BD2C0112410EE99" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_DebtLineItems_C8AEACEBBACE9E712BD2C0112410EE99" xlink:to="lab_mdca_DebtLineItems_C8AEACEBBACE9E712BD2C0112410EE99" xlink:type="arc" />
    <link:label id="lab_us-gaap_LongTermLineOfCredit_F9B053750F3A6A377F5BC0112410199D_verboseLabel_en-US" xlink:label="lab_us-gaap_LongTermLineOfCredit_F9B053750F3A6A377F5BC0112410199D" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Revolving credit agreement</link:label>
    <link:label id="lab_us-gaap_LongTermLineOfCredit_F9B053750F3A6A377F5BC0112410199D_label_en-US" xlink:label="lab_us-gaap_LongTermLineOfCredit_F9B053750F3A6A377F5BC0112410199D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Line of Credit, Noncurrent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermLineOfCredit" xlink:label="loc_us-gaap_LongTermLineOfCredit_F9B053750F3A6A377F5BC0112410199D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermLineOfCredit_F9B053750F3A6A377F5BC0112410199D" xlink:to="lab_us-gaap_LongTermLineOfCredit_F9B053750F3A6A377F5BC0112410199D" xlink:type="arc" />
    <link:label id="lab_us-gaap_SeniorNotes_AC7A57BE6E07862AF9AFC01124113FDB_terseLabel_en-US" xlink:label="lab_us-gaap_SeniorNotes_AC7A57BE6E07862AF9AFC01124113FDB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Senior Notes</link:label>
    <link:label id="lab_us-gaap_SeniorNotes_AC7A57BE6E07862AF9AFC01124113FDB_label_en-US" xlink:label="lab_us-gaap_SeniorNotes_AC7A57BE6E07862AF9AFC01124113FDB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Senior Notes</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SeniorNotes" xlink:label="loc_us-gaap_SeniorNotes_AC7A57BE6E07862AF9AFC01124113FDB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SeniorNotes_AC7A57BE6E07862AF9AFC01124113FDB" xlink:to="lab_us-gaap_SeniorNotes_AC7A57BE6E07862AF9AFC01124113FDB" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredFinanceCostsNet_142274C50188BD68F595C0112411F4E3_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_DeferredFinanceCostsNet_142274C50188BD68F595C0112411F4E3" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Debt issuance costs</link:label>
    <link:label id="lab_us-gaap_DeferredFinanceCostsNet_142274C50188BD68F595C0112411F4E3_label_en-US" xlink:label="lab_us-gaap_DeferredFinanceCostsNet_142274C50188BD68F595C0112411F4E3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Issuance Costs, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredFinanceCostsNet" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_142274C50188BD68F595C0112411F4E3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredFinanceCostsNet_142274C50188BD68F595C0112411F4E3" xlink:to="lab_us-gaap_DeferredFinanceCostsNet_142274C50188BD68F595C0112411F4E3" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtLongtermAndShorttermCombinedAmount_C0BABD4CF1F1CA71EDFDC01124113530_terseLabel_en-US" xlink:label="lab_us-gaap_DebtLongtermAndShorttermCombinedAmount_C0BABD4CF1F1CA71EDFDC01124113530" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt, Long-term and Short-term, Combined Amount, Total</link:label>
    <link:label id="lab_us-gaap_DebtLongtermAndShorttermCombinedAmount_C0BABD4CF1F1CA71EDFDC01124113530_label_en-US" xlink:label="lab_us-gaap_DebtLongtermAndShorttermCombinedAmount_C0BABD4CF1F1CA71EDFDC01124113530" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt, Long-term and Short-term, Combined Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtLongtermAndShorttermCombinedAmount" xlink:label="loc_us-gaap_DebtLongtermAndShorttermCombinedAmount_C0BABD4CF1F1CA71EDFDC01124113530" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtLongtermAndShorttermCombinedAmount_C0BABD4CF1F1CA71EDFDC01124113530" xlink:to="lab_us-gaap_DebtLongtermAndShorttermCombinedAmount_C0BABD4CF1F1CA71EDFDC01124113530" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfStockByClassTable_500FB0922B7D899B17C1C01124468122_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfStockByClassTable_500FB0922B7D899B17C1C01124468122" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Stock by Class [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfStockByClassTable_500FB0922B7D899B17C1C01124468122_label_en-US" xlink:label="lab_us-gaap_ScheduleOfStockByClassTable_500FB0922B7D899B17C1C01124468122" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Stock by Class [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfStockByClassTable" xlink:label="loc_us-gaap_ScheduleOfStockByClassTable_500FB0922B7D899B17C1C01124468122" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_500FB0922B7D899B17C1C01124468122" xlink:to="lab_us-gaap_ScheduleOfStockByClassTable_500FB0922B7D899B17C1C01124468122" xlink:type="arc" />
    <link:label id="lab_us-gaap_ClassOfStockLineItems_44D8534034546D51AAB3C01124484F43_terseLabel_en-US" xlink:label="lab_us-gaap_ClassOfStockLineItems_44D8534034546D51AAB3C01124484F43" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Class of Stock [Line Items]</link:label>
    <link:label id="lab_us-gaap_ClassOfStockLineItems_44D8534034546D51AAB3C01124484F43_label_en-US" xlink:label="lab_us-gaap_ClassOfStockLineItems_44D8534034546D51AAB3C01124484F43" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Class of Stock [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ClassOfStockLineItems" xlink:label="loc_us-gaap_ClassOfStockLineItems_44D8534034546D51AAB3C01124484F43" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ClassOfStockLineItems_44D8534034546D51AAB3C01124484F43" xlink:to="lab_us-gaap_ClassOfStockLineItems_44D8534034546D51AAB3C01124484F43" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetIncomeLoss_72FFD850FFA8CD92AF12C0112448073F_netLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLoss_72FFD850FFA8CD92AF12C0112448073F" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:type="resource" xml:lang="en-US">Net loss attributable to MDC Partners Inc.</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_72FFD850FFA8CD92AF12C0112448073F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetIncomeLoss_72FFD850FFA8CD92AF12C0112448073F" xlink:to="lab_us-gaap_NetIncomeLoss_72FFD850FFA8CD92AF12C0112448073F" xlink:type="arc" />
    <link:label id="lab_mdca_NumeratorAbstract_9228AEE2E38830F4EB04C0112449A754_verboseLabel_en-US" xlink:label="lab_mdca_NumeratorAbstract_9228AEE2E38830F4EB04C0112449A754" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Numerator</link:label>
    <link:label id="lab_mdca_NumeratorAbstract_9228AEE2E38830F4EB04C0112449A754_label_en-US" xlink:label="lab_mdca_NumeratorAbstract_9228AEE2E38830F4EB04C0112449A754" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Numerator [Abstract]</link:label>
    <link:label id="lab_mdca_NumeratorAbstract_9228AEE2E38830F4EB04C0112449A754_documentation_en-US" xlink:label="lab_mdca_NumeratorAbstract_9228AEE2E38830F4EB04C0112449A754" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US" />
    <link:loc xlink:href="mdca-20200630.xsd#mdca_NumeratorAbstract" xlink:label="loc_mdca_NumeratorAbstract_9228AEE2E38830F4EB04C0112449A754" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_NumeratorAbstract_9228AEE2E38830F4EB04C0112449A754" xlink:to="lab_mdca_NumeratorAbstract_9228AEE2E38830F4EB04C0112449A754" xlink:type="arc" />
    <link:label id="lab_mdca_AccretiononConvertiblePreferredShares_35081992AEAB137EF528C01124498478_negatedTerseLabel_en-US" xlink:label="lab_mdca_AccretiononConvertiblePreferredShares_35081992AEAB137EF528C01124498478" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Accretion on and net income allocated to convertible preference shares</link:label>
    <link:label id="lab_mdca_AccretiononConvertiblePreferredShares_35081992AEAB137EF528C01124498478_label_en-US" xlink:label="lab_mdca_AccretiononConvertiblePreferredShares_35081992AEAB137EF528C01124498478" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accretion on Convertible Preferred Shares</link:label>
    <link:label id="lab_mdca_AccretiononConvertiblePreferredShares_35081992AEAB137EF528C01124498478_documentation_en-US" xlink:label="lab_mdca_AccretiononConvertiblePreferredShares_35081992AEAB137EF528C01124498478" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Accretion on Convertible Preferred Shares</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_AccretiononConvertiblePreferredShares" xlink:label="loc_mdca_AccretiononConvertiblePreferredShares_35081992AEAB137EF528C01124498478" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_AccretiononConvertiblePreferredShares_35081992AEAB137EF528C01124498478" xlink:to="lab_mdca_AccretiononConvertiblePreferredShares_35081992AEAB137EF528C01124498478" xlink:type="arc" />
    <link:label id="lab_mdca_NetIncomeAllocatedtoConvertibleShares_C53E247748326B29267FC0112449D7BA_terseLabel_en-US" xlink:label="lab_mdca_NetIncomeAllocatedtoConvertibleShares_C53E247748326B29267FC0112449D7BA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net income allocated to convertible preference shares</link:label>
    <link:label id="lab_mdca_NetIncomeAllocatedtoConvertibleShares_C53E247748326B29267FC0112449D7BA_label_en-US" xlink:label="lab_mdca_NetIncomeAllocatedtoConvertibleShares_C53E247748326B29267FC0112449D7BA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Income Allocated to Convertible Shares</link:label>
    <link:label id="lab_mdca_NetIncomeAllocatedtoConvertibleShares_C53E247748326B29267FC0112449D7BA_documentation_en-US" xlink:label="lab_mdca_NetIncomeAllocatedtoConvertibleShares_C53E247748326B29267FC0112449D7BA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Net Income Allocated to Convertible Shares</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_NetIncomeAllocatedtoConvertibleShares" xlink:label="loc_mdca_NetIncomeAllocatedtoConvertibleShares_C53E247748326B29267FC0112449D7BA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_NetIncomeAllocatedtoConvertibleShares_C53E247748326B29267FC0112449D7BA" xlink:to="lab_mdca_NetIncomeAllocatedtoConvertibleShares_C53E247748326B29267FC0112449D7BA" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeLossFromContinuingOperations_21979AD87265C6B8310FC011244986FE_totalLabel_en-US" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperations_21979AD87265C6B8310FC011244986FE" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net income (loss) attributable to MDC Partners Inc. common shareholders</link:label>
    <link:label id="lab_us-gaap_IncomeLossFromContinuingOperations_21979AD87265C6B8310FC011244986FE_label_en-US" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperations_21979AD87265C6B8310FC011244986FE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeLossFromContinuingOperations" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperations_21979AD87265C6B8310FC011244986FE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperations_21979AD87265C6B8310FC011244986FE" xlink:to="lab_us-gaap_IncomeLossFromContinuingOperations_21979AD87265C6B8310FC011244986FE" xlink:type="arc" />
    <link:label id="lab_mdca_IncomeLossfromContinuingOperationsAttributabletoParentDiluted_F6B0525EABC55307BE33C0112449A17E_terseLabel_en-US" xlink:label="lab_mdca_IncomeLossfromContinuingOperationsAttributabletoParentDiluted_F6B0525EABC55307BE33C0112449A17E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net loss attributable to MDC Partners Inc. common shareholders</link:label>
    <link:label id="lab_mdca_IncomeLossfromContinuingOperationsAttributabletoParentDiluted_F6B0525EABC55307BE33C0112449A17E_label_en-US" xlink:label="lab_mdca_IncomeLossfromContinuingOperationsAttributabletoParentDiluted_F6B0525EABC55307BE33C0112449A17E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income (Loss) from Continuing Operations Attributable to Parent, Diluted</link:label>
    <link:label id="lab_mdca_IncomeLossfromContinuingOperationsAttributabletoParentDiluted_F6B0525EABC55307BE33C0112449A17E_documentation_en-US" xlink:label="lab_mdca_IncomeLossfromContinuingOperationsAttributabletoParentDiluted_F6B0525EABC55307BE33C0112449A17E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount of income (loss) from continuing operations attributable to the parent, and includes adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions.</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_IncomeLossfromContinuingOperationsAttributabletoParentDiluted" xlink:label="loc_mdca_IncomeLossfromContinuingOperationsAttributabletoParentDiluted_F6B0525EABC55307BE33C0112449A17E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_IncomeLossfromContinuingOperationsAttributabletoParentDiluted_F6B0525EABC55307BE33C0112449A17E" xlink:to="lab_mdca_IncomeLossfromContinuingOperationsAttributabletoParentDiluted_F6B0525EABC55307BE33C0112449A17E" xlink:type="arc" />
    <link:label id="lab_mdca_DenominatorAbstract_00857AB214422E19372BC011244A6022_verboseLabel_en-US" xlink:label="lab_mdca_DenominatorAbstract_00857AB214422E19372BC011244A6022" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Denominator</link:label>
    <link:label id="lab_mdca_DenominatorAbstract_00857AB214422E19372BC011244A6022_label_en-US" xlink:label="lab_mdca_DenominatorAbstract_00857AB214422E19372BC011244A6022" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Denominator [Abstract]</link:label>
    <link:label id="lab_mdca_DenominatorAbstract_00857AB214422E19372BC011244A6022_documentation_en-US" xlink:label="lab_mdca_DenominatorAbstract_00857AB214422E19372BC011244A6022" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US" />
    <link:loc xlink:href="mdca-20200630.xsd#mdca_DenominatorAbstract" xlink:label="loc_mdca_DenominatorAbstract_00857AB214422E19372BC011244A6022" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_DenominatorAbstract_00857AB214422E19372BC011244A6022" xlink:to="lab_mdca_DenominatorAbstract_00857AB214422E19372BC011244A6022" xlink:type="arc" />
    <link:label id="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_5E7E058A2B10A5587E3CC011244AE1DC_verboseLabel_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_5E7E058A2B10A5587E3CC011244AE1DC" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Denominator for basic income (loss) per common share - weighted average common shares</link:label>
    <link:label id="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_5E7E058A2B10A5587E3CC011244AE1DC_label_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_5E7E058A2B10A5587E3CC011244AE1DC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Weighted Average Number of Shares Outstanding, Basic</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_5E7E058A2B10A5587E3CC011244AE1DC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_5E7E058A2B10A5587E3CC011244AE1DC" xlink:to="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_5E7E058A2B10A5587E3CC011244AE1DC" xlink:type="arc" />
    <link:label id="lab_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_D78B4BFB3AF594C7000EC011244A3D0E_terseLabel_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_D78B4BFB3AF594C7000EC011244A3D0E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Impact of stock options and non-vested stock under employee stock incentive plans (in shares)</link:label>
    <link:label id="lab_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_D78B4BFB3AF594C7000EC011244A3D0E_label_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_D78B4BFB3AF594C7000EC011244A3D0E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Weighted Average Number Diluted Shares Outstanding Adjustment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment" xlink:label="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_D78B4BFB3AF594C7000EC011244A3D0E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_D78B4BFB3AF594C7000EC011244A3D0E" xlink:to="lab_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_D78B4BFB3AF594C7000EC011244A3D0E" xlink:type="arc" />
    <link:label id="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_8E1BCFC472C60CF02164C011244AE362_totalLabel_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_8E1BCFC472C60CF02164C011244AE362" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Denominator for diluted income (loss) per common share - adjusted weighted shares and assumed conversions</link:label>
    <link:label id="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_8E1BCFC472C60CF02164C011244AE362_label_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_8E1BCFC472C60CF02164C011244AE362" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Weighted Average Number of Shares Outstanding, Diluted</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_8E1BCFC472C60CF02164C011244AE362" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_8E1BCFC472C60CF02164C011244AE362" xlink:to="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_8E1BCFC472C60CF02164C011244AE362" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_26042F39F57428BB77B7C011244ABE54_verboseLabel_en-US" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_26042F39F57428BB77B7C011244ABE54" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Earnings per share, basic</link:label>
    <link:label id="lab_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_26042F39F57428BB77B7C011244ABE54_label_en-US" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_26042F39F57428BB77B7C011244ABE54" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income (Loss) from Continuing Operations, Per Basic Share</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsPerBasicShare" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_26042F39F57428BB77B7C011244ABE54" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_26042F39F57428BB77B7C011244ABE54" xlink:to="lab_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_26042F39F57428BB77B7C011244ABE54" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_8A62AA2F36E3AD0EF852C011244A3C41_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_8A62AA2F36E3AD0EF852C011244A3C41" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Earnings per share, diluted</link:label>
    <link:label id="lab_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_8A62AA2F36E3AD0EF852C011244A3C41_label_en-US" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_8A62AA2F36E3AD0EF852C011244A3C41" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income (Loss) from Continuing Operations, Per Diluted Share</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_8A62AA2F36E3AD0EF852C011244A3C41" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_8A62AA2F36E3AD0EF852C011244A3C41" xlink:to="lab_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_8A62AA2F36E3AD0EF852C011244A3C41" xlink:type="arc" />
    <link:label id="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_1199FE201F1A2F9C0818C011244A0B47_terseLabel_en-US" xlink:label="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_1199FE201F1A2F9C0818C011244A0B47" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_1199FE201F1A2F9C0818C011244A0B47" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_1199FE201F1A2F9C0818C011244A0B47" xlink:to="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_1199FE201F1A2F9C0818C011244A0B47" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_1EF7062B323F99907D26C41BDCA02E9E_label_en-US" xlink:label="lab_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_1EF7062B323F99907D26C41BDCA02E9E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement of Comprehensive Income [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract" xlink:label="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_1EF7062B323F99907D26C41BDCA02E9E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_1EF7062B323F99907D26C41BDCA02E9E" xlink:to="lab_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_1EF7062B323F99907D26C41BDCA02E9E" xlink:type="arc" />
    <link:label id="lab_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_F72D4DBFCC8A5ADAF0BEC41BDCA2E480_verboseLabel_en-US" xlink:label="lab_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_F72D4DBFCC8A5ADAF0BEC41BDCA2E480" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Comprehensive income (loss)</link:label>
    <link:label id="lab_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_F72D4DBFCC8A5ADAF0BEC41BDCA2E480_label_en-US" xlink:label="lab_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_F72D4DBFCC8A5ADAF0BEC41BDCA2E480" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxAbstract" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_F72D4DBFCC8A5ADAF0BEC41BDCA2E480" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_F72D4DBFCC8A5ADAF0BEC41BDCA2E480" xlink:to="lab_us-gaap_ComprehensiveIncomeNetOfTaxAbstract_F72D4DBFCC8A5ADAF0BEC41BDCA2E480" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProfitLoss_5447DC304E5C849BF248C41BDCA35D99_terseLabel_en-US" xlink:label="lab_us-gaap_ProfitLoss_5447DC304E5C849BF248C41BDCA35D99" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net loss</link:label>
    <link:label id="lab_us-gaap_ProfitLoss_5447DC304E5C849BF248C41BDCA35D99_label_en-US" xlink:label="lab_us-gaap_ProfitLoss_5447DC304E5C849BF248C41BDCA35D99" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Income (Loss), Including Portion Attributable to Noncontrolling Interest</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_5447DC304E5C849BF248C41BDCA35D99" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProfitLoss_5447DC304E5C849BF248C41BDCA35D99" xlink:to="lab_us-gaap_ProfitLoss_5447DC304E5C849BF248C41BDCA35D99" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_1A2BE275632A8614F97BC41BDCA38C57_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_1A2BE275632A8614F97BC41BDCA38C57" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other comprehensive income (loss), net of applicable tax:</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_1A2BE275632A8614F97BC41BDCA38C57_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_1A2BE275632A8614F97BC41BDCA38C57" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Net of Tax [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_1A2BE275632A8614F97BC41BDCA38C57" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_1A2BE275632A8614F97BC41BDCA38C57" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_1A2BE275632A8614F97BC41BDCA38C57" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_6627099A961C92C99B95C41BDCA55AF7_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_6627099A961C92C99B95C41BDCA55AF7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreign currency translation adjustment</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_6627099A961C92C99B95C41BDCA55AF7_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_6627099A961C92C99B95C41BDCA55AF7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_6627099A961C92C99B95C41BDCA55AF7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_6627099A961C92C99B95C41BDCA55AF7" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_6627099A961C92C99B95C41BDCA55AF7" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTax_5118C10D5A19AD241C35C41BDCA678F3_totalLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTax_5118C10D5A19AD241C35C41BDCA678F3" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Other comprehensive income (loss)</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTax_5118C10D5A19AD241C35C41BDCA678F3_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTax_5118C10D5A19AD241C35C41BDCA678F3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Net of Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_5118C10D5A19AD241C35C41BDCA678F3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_5118C10D5A19AD241C35C41BDCA678F3" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTax_5118C10D5A19AD241C35C41BDCA678F3" xlink:type="arc" />
    <link:label id="lab_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_5E88A9AA33CBDAC39E2EC41BDCA60C1E_totalLabel_en-US" xlink:label="lab_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_5E88A9AA33CBDAC39E2EC41BDCA60C1E" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Comprehensive income (loss) for the period</link:label>
    <link:label id="lab_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_5E88A9AA33CBDAC39E2EC41BDCA60C1E_label_en-US" xlink:label="lab_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_5E88A9AA33CBDAC39E2EC41BDCA60C1E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_5E88A9AA33CBDAC39E2EC41BDCA60C1E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_5E88A9AA33CBDAC39E2EC41BDCA60C1E" xlink:to="lab_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_5E88A9AA33CBDAC39E2EC41BDCA60C1E" xlink:type="arc" />
    <link:label id="lab_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_7AAA6CBA35811F1FE502C41BDCA6E901_negatedLabel_en-US" xlink:label="lab_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_7AAA6CBA35811F1FE502C41BDCA6E901" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Comprehensive income attributable to the noncontrolling interests</link:label>
    <link:label id="lab_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_7AAA6CBA35811F1FE502C41BDCA6E901_label_en-US" xlink:label="lab_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_7AAA6CBA35811F1FE502C41BDCA6E901" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_7AAA6CBA35811F1FE502C41BDCA6E901" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_7AAA6CBA35811F1FE502C41BDCA6E901" xlink:to="lab_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_7AAA6CBA35811F1FE502C41BDCA6E901" xlink:type="arc" />
    <link:label id="lab_us-gaap_ComprehensiveIncomeNetOfTax_CECB83E5B0E69D2B8CA6C41BDCA6BB98_totalLabel_en-US" xlink:label="lab_us-gaap_ComprehensiveIncomeNetOfTax_CECB83E5B0E69D2B8CA6C41BDCA6BB98" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Comprehensive income (loss) attributable to MDC Partners Inc.</link:label>
    <link:label id="lab_us-gaap_ComprehensiveIncomeNetOfTax_CECB83E5B0E69D2B8CA6C41BDCA6BB98_label_en-US" xlink:label="lab_us-gaap_ComprehensiveIncomeNetOfTax_CECB83E5B0E69D2B8CA6C41BDCA6BB98" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Comprehensive Income (Loss), Net of Tax, Attributable to Parent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_CECB83E5B0E69D2B8CA6C41BDCA6BB98" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_CECB83E5B0E69D2B8CA6C41BDCA6BB98" xlink:to="lab_us-gaap_ComprehensiveIncomeNetOfTax_CECB83E5B0E69D2B8CA6C41BDCA6BB98" xlink:type="arc" />
    <link:label id="lab_us-gaap_SegmentReportingAbstract_4CF123243F8371C28F0FC0112395D183_label_en-US" xlink:label="lab_us-gaap_SegmentReportingAbstract_4CF123243F8371C28F0FC0112395D183" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Segment Reporting [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_4CF123243F8371C28F0FC0112395D183" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SegmentReportingAbstract_4CF123243F8371C28F0FC0112395D183" xlink:to="lab_us-gaap_SegmentReportingAbstract_4CF123243F8371C28F0FC0112395D183" xlink:type="arc" />
    <link:label id="lab_us-gaap_SegmentReportingDisclosureTextBlock_6BAFB0520358D8A78697C01123951607_verboseLabel_en-US" xlink:label="lab_us-gaap_SegmentReportingDisclosureTextBlock_6BAFB0520358D8A78697C01123951607" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Segment Information</link:label>
    <link:label id="lab_us-gaap_SegmentReportingDisclosureTextBlock_6BAFB0520358D8A78697C01123951607_label_en-US" xlink:label="lab_us-gaap_SegmentReportingDisclosureTextBlock_6BAFB0520358D8A78697C01123951607" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Segment Reporting Disclosure [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentReportingDisclosureTextBlock" xlink:label="loc_us-gaap_SegmentReportingDisclosureTextBlock_6BAFB0520358D8A78697C01123951607" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SegmentReportingDisclosureTextBlock_6BAFB0520358D8A78697C01123951607" xlink:to="lab_us-gaap_SegmentReportingDisclosureTextBlock_6BAFB0520358D8A78697C01123951607" xlink:type="arc" />
    <link:label id="lab_mdca_AccruedMediaCostCurrent_0DD74FBB25D2F6B2F911D8CEA5F6B4DE_terseLabel_en-US" xlink:label="lab_mdca_AccruedMediaCostCurrent_0DD74FBB25D2F6B2F911D8CEA5F6B4DE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accrued media</link:label>
    <link:label id="lab_mdca_AccruedMediaCostCurrent_0DD74FBB25D2F6B2F911D8CEA5F6B4DE_label_en-US" xlink:label="lab_mdca_AccruedMediaCostCurrent_0DD74FBB25D2F6B2F911D8CEA5F6B4DE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accrued Media Cost, Current</link:label>
    <link:label id="lab_mdca_AccruedMediaCostCurrent_0DD74FBB25D2F6B2F911D8CEA5F6B4DE_documentation_en-US" xlink:label="lab_mdca_AccruedMediaCostCurrent_0DD74FBB25D2F6B2F911D8CEA5F6B4DE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Accrued Media Cost, Current</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_AccruedMediaCostCurrent" xlink:label="loc_mdca_AccruedMediaCostCurrent_0DD74FBB25D2F6B2F911D8CEA5F6B4DE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_AccruedMediaCostCurrent_0DD74FBB25D2F6B2F911D8CEA5F6B4DE" xlink:to="lab_mdca_AccruedMediaCostCurrent_0DD74FBB25D2F6B2F911D8CEA5F6B4DE" xlink:type="arc" />
    <link:label id="lab_us-gaap_AssetImpairmentCharges_597816236488E3D5B91FD8CFB563F7F0_verboseLabel_en-US" xlink:label="lab_us-gaap_AssetImpairmentCharges_597816236488E3D5B91FD8CFB563F7F0" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Asset Impairment Charges</link:label>
    <link:label id="lab_us-gaap_AssetImpairmentCharges_597816236488E3D5B91FD8CFB563F7F0_label_en-US" xlink:label="lab_us-gaap_AssetImpairmentCharges_597816236488E3D5B91FD8CFB563F7F0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Asset Impairment Charges</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetImpairmentCharges" xlink:label="loc_us-gaap_AssetImpairmentCharges_597816236488E3D5B91FD8CFB563F7F0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetImpairmentCharges_597816236488E3D5B91FD8CFB563F7F0" xlink:to="lab_us-gaap_AssetImpairmentCharges_597816236488E3D5B91FD8CFB563F7F0" xlink:type="arc" />
    <link:label id="lab_mdca_ImpairmentofRightOfUseAsset_AE21C783C13F62E7C49BD8CFB42BAD80_verboseLabel_en-US" xlink:label="lab_mdca_ImpairmentofRightOfUseAsset_AE21C783C13F62E7C49BD8CFB42BAD80" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Impairment of Right-Of-Use Asset</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_ImpairmentofRightOfUseAsset" xlink:label="loc_mdca_ImpairmentofRightOfUseAsset_AE21C783C13F62E7C49BD8CFB42BAD80" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_ImpairmentofRightOfUseAsset_AE21C783C13F62E7C49BD8CFB42BAD80" xlink:to="lab_mdca_ImpairmentofRightOfUseAsset_AE21C783C13F62E7C49BD8CFB42BAD80" xlink:type="arc" />
    <link:label id="lab_us-gaap_IndefinitelivedIntangibleAssetsAcquired_9151C01315B9D8ECA7C6D8CEA5F62192_terseLabel_en-US" xlink:label="lab_us-gaap_IndefinitelivedIntangibleAssetsAcquired_9151C01315B9D8ECA7C6D8CEA5F62192" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Indefinite-lived intangible assets acquired</link:label>
    <link:label id="lab_us-gaap_IndefinitelivedIntangibleAssetsAcquired_9151C01315B9D8ECA7C6D8CEA5F62192_label_en-US" xlink:label="lab_us-gaap_IndefinitelivedIntangibleAssetsAcquired_9151C01315B9D8ECA7C6D8CEA5F62192" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Indefinite-lived Intangible Assets Acquired</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IndefinitelivedIntangibleAssetsAcquired" xlink:label="loc_us-gaap_IndefinitelivedIntangibleAssetsAcquired_9151C01315B9D8ECA7C6D8CEA5F62192" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IndefinitelivedIntangibleAssetsAcquired_9151C01315B9D8ECA7C6D8CEA5F62192" xlink:to="lab_us-gaap_IndefinitelivedIntangibleAssetsAcquired_9151C01315B9D8ECA7C6D8CEA5F62192" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1_DC8675A1EE785D27CD91D8CEA5F62F3B_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1_DC8675A1EE785D27CD91D8CEA5F62F3B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Finite-lived intangible assets, remaining amortization period</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1_DC8675A1EE785D27CD91D8CEA5F62F3B_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1_DC8675A1EE785D27CD91D8CEA5F62F3B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Remaining Amortization Period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1_DC8675A1EE785D27CD91D8CEA5F62F3B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1_DC8675A1EE785D27CD91D8CEA5F62F3B" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1_DC8675A1EE785D27CD91D8CEA5F62F3B" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxExpenseBenefit_78C68C9EEC70AA1E1298D8CEA5F753DC_verboseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefit_78C68C9EEC70AA1E1298D8CEA5F753DC" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Income tax expense (benefit)</link:label>
    <link:label id="lab_us-gaap_IncomeTaxExpenseBenefit_78C68C9EEC70AA1E1298D8CEA5F753DC_label_en-US" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefit_78C68C9EEC70AA1E1298D8CEA5F753DC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Tax Expense (Benefit)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_78C68C9EEC70AA1E1298D8CEA5F753DC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_78C68C9EEC70AA1E1298D8CEA5F753DC" xlink:to="lab_us-gaap_IncomeTaxExpenseBenefit_78C68C9EEC70AA1E1298D8CEA5F753DC" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_C2E127A7D9935B31737CD8CEA5F76B02_verboseLabel_en-US" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_C2E127A7D9935B31737CD8CEA5F76B02" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Income (loss) before income taxes and equity in earnings of non-consolidated affiliates</link:label>
    <link:label id="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_C2E127A7D9935B31737CD8CEA5F76B02_label_en-US" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_C2E127A7D9935B31737CD8CEA5F76B02" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_C2E127A7D9935B31737CD8CEA5F76B02" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_C2E127A7D9935B31737CD8CEA5F76B02" xlink:to="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_C2E127A7D9935B31737CD8CEA5F76B02" xlink:type="arc" />
    <link:label id="lab_mdca_IncreaseDecreaseinDeferredIncomeTaxAssets_36FFAD0BD65A8C54CC6BD8D64D5E92B0_terseLabel_en-US" xlink:label="lab_mdca_IncreaseDecreaseinDeferredIncomeTaxAssets_36FFAD0BD65A8C54CC6BD8D64D5E92B0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Deferred Income Tax Assets</link:label>
    <link:label id="lab_mdca_IncreaseDecreaseinDeferredIncomeTaxAssets_36FFAD0BD65A8C54CC6BD8D64D5E92B0_label_en-US" xlink:label="lab_mdca_IncreaseDecreaseinDeferredIncomeTaxAssets_36FFAD0BD65A8C54CC6BD8D64D5E92B0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Deferred Income Tax Assets</link:label>
    <link:label id="lab_mdca_IncreaseDecreaseinDeferredIncomeTaxAssets_36FFAD0BD65A8C54CC6BD8D64D5E92B0_documentation_en-US" xlink:label="lab_mdca_IncreaseDecreaseinDeferredIncomeTaxAssets_36FFAD0BD65A8C54CC6BD8D64D5E92B0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Deferred Income Tax Assets</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_IncreaseDecreaseinDeferredIncomeTaxAssets" xlink:label="loc_mdca_IncreaseDecreaseinDeferredIncomeTaxAssets_36FFAD0BD65A8C54CC6BD8D64D5E92B0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_IncreaseDecreaseinDeferredIncomeTaxAssets_36FFAD0BD65A8C54CC6BD8D64D5E92B0" xlink:to="lab_mdca_IncreaseDecreaseinDeferredIncomeTaxAssets_36FFAD0BD65A8C54CC6BD8D64D5E92B0" xlink:type="arc" />
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateContinuingOperations_E14A44DCEE60EE6E8202D8CEA5F78E07_verboseLabel_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateContinuingOperations_E14A44DCEE60EE6E8202D8CEA5F78E07" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Effective tax rate (percent)</link:label>
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateContinuingOperations_E14A44DCEE60EE6E8202D8CEA5F78E07_label_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateContinuingOperations_E14A44DCEE60EE6E8202D8CEA5F78E07" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Effective Income Tax Rate Reconciliation, Percent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_E14A44DCEE60EE6E8202D8CEA5F78E07" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_E14A44DCEE60EE6E8202D8CEA5F78E07" xlink:to="lab_us-gaap_EffectiveIncomeTaxRateContinuingOperations_E14A44DCEE60EE6E8202D8CEA5F78E07" xlink:type="arc" />
    <link:label id="lab_us-gaap_Revenues_D05E7B9CCAB138E4FC23D8D2CC3B4E04_verboseLabel_en-US" xlink:label="lab_us-gaap_Revenues_D05E7B9CCAB138E4FC23D8D2CC3B4E04" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Revenues</link:label>
    <link:label id="lab_us-gaap_Revenues_D05E7B9CCAB138E4FC23D8D2CC3B4E04_label_en-US" xlink:label="lab_us-gaap_Revenues_D05E7B9CCAB138E4FC23D8D2CC3B4E04" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenues</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_D05E7B9CCAB138E4FC23D8D2CC3B4E04" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Revenues_D05E7B9CCAB138E4FC23D8D2CC3B4E04" xlink:to="lab_us-gaap_Revenues_D05E7B9CCAB138E4FC23D8D2CC3B4E04" xlink:type="arc" />
    <link:label id="lab_us-gaap_GoodwillPeriodIncreaseDecrease_C0852395D26A5C39EF0FD8D727973DD9_terseLabel_en-US" xlink:label="lab_us-gaap_GoodwillPeriodIncreaseDecrease_C0852395D26A5C39EF0FD8D727973DD9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Goodwill, Period Increase (Decrease)</link:label>
    <link:label id="lab_us-gaap_GoodwillPeriodIncreaseDecrease_C0852395D26A5C39EF0FD8D727973DD9_label_en-US" xlink:label="lab_us-gaap_GoodwillPeriodIncreaseDecrease_C0852395D26A5C39EF0FD8D727973DD9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Goodwill, Period Increase (Decrease)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GoodwillPeriodIncreaseDecrease" xlink:label="loc_us-gaap_GoodwillPeriodIncreaseDecrease_C0852395D26A5C39EF0FD8D727973DD9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GoodwillPeriodIncreaseDecrease_C0852395D26A5C39EF0FD8D727973DD9" xlink:to="lab_us-gaap_GoodwillPeriodIncreaseDecrease_C0852395D26A5C39EF0FD8D727973DD9" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_2E605F540ACFC544BF09D8D92E776E37_verboseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_2E605F540ACFC544BF09D8D92E776E37" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Accounts Receivable</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_2E605F540ACFC544BF09D8D92E776E37_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_2E605F540ACFC544BF09D8D92E776E37" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Accounts Receivable</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_2E605F540ACFC544BF09D8D92E776E37" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_2E605F540ACFC544BF09D8D92E776E37" xlink:to="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_2E605F540ACFC544BF09D8D92E776E37" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInDeferredIncomeTaxes_7DAD74FE99159967B018D8DA6D485756_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInDeferredIncomeTaxes_7DAD74FE99159967B018D8DA6D485756" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Deferred Income Taxes</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInDeferredIncomeTaxes_7DAD74FE99159967B018D8DA6D485756_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInDeferredIncomeTaxes_7DAD74FE99159967B018D8DA6D485756" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Deferred Income Taxes</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInDeferredIncomeTaxes" xlink:label="loc_us-gaap_IncreaseDecreaseInDeferredIncomeTaxes_7DAD74FE99159967B018D8DA6D485756" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInDeferredIncomeTaxes_7DAD74FE99159967B018D8DA6D485756" xlink:to="lab_us-gaap_IncreaseDecreaseInDeferredIncomeTaxes_7DAD74FE99159967B018D8DA6D485756" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_88F086A39D544F48DF83D414D081DA97_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_88F086A39D544F48DF83D414D081DA97" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Segment Reporting Information, by Segment [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_88F086A39D544F48DF83D414D081DA97_label_en-US" xlink:label="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_88F086A39D544F48DF83D414D081DA97" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Segment Reporting Information, by Segment [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_88F086A39D544F48DF83D414D081DA97" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_88F086A39D544F48DF83D414D081DA97" xlink:to="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_88F086A39D544F48DF83D414D081DA97" xlink:type="arc" />
    <link:label id="lab_srt_ConsolidationItemsAxis_BB0AF1860CDBED59EDF8D414D0816285_terseLabel_en-US" xlink:label="lab_srt_ConsolidationItemsAxis_BB0AF1860CDBED59EDF8D414D0816285" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Consolidation Items [Axis]</link:label>
    <link:label id="lab_srt_ConsolidationItemsAxis_BB0AF1860CDBED59EDF8D414D0816285_label_en-US" xlink:label="lab_srt_ConsolidationItemsAxis_BB0AF1860CDBED59EDF8D414D0816285" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Consolidation Items [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsAxis" xlink:label="loc_srt_ConsolidationItemsAxis_BB0AF1860CDBED59EDF8D414D0816285" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ConsolidationItemsAxis_BB0AF1860CDBED59EDF8D414D0816285" xlink:to="lab_srt_ConsolidationItemsAxis_BB0AF1860CDBED59EDF8D414D0816285" xlink:type="arc" />
    <link:label id="lab_srt_ConsolidationItemsDomain_6A7CB38FA7C7D0F1D452D414D081D54A_terseLabel_en-US" xlink:label="lab_srt_ConsolidationItemsDomain_6A7CB38FA7C7D0F1D452D414D081D54A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Consolidation Items [Domain]</link:label>
    <link:label id="lab_srt_ConsolidationItemsDomain_6A7CB38FA7C7D0F1D452D414D081D54A_label_en-US" xlink:label="lab_srt_ConsolidationItemsDomain_6A7CB38FA7C7D0F1D452D414D081D54A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Consolidation Items [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsDomain" xlink:label="loc_srt_ConsolidationItemsDomain_6A7CB38FA7C7D0F1D452D414D081D54A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ConsolidationItemsDomain_6A7CB38FA7C7D0F1D452D414D081D54A" xlink:to="lab_srt_ConsolidationItemsDomain_6A7CB38FA7C7D0F1D452D414D081D54A" xlink:type="arc" />
    <link:label id="lab_us-gaap_CorporateNonSegmentMember_485259ABBB88A2CBBDD7D414D082E921_terseLabel_en-US" xlink:label="lab_us-gaap_CorporateNonSegmentMember_485259ABBB88A2CBBDD7D414D082E921" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Corporate, Non-Segment</link:label>
    <link:label id="lab_us-gaap_CorporateNonSegmentMember_485259ABBB88A2CBBDD7D414D082E921_label_en-US" xlink:label="lab_us-gaap_CorporateNonSegmentMember_485259ABBB88A2CBBDD7D414D082E921" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Corporate, Non-Segment [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CorporateNonSegmentMember" xlink:label="loc_us-gaap_CorporateNonSegmentMember_485259ABBB88A2CBBDD7D414D082E921" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CorporateNonSegmentMember_485259ABBB88A2CBBDD7D414D082E921" xlink:to="lab_us-gaap_CorporateNonSegmentMember_485259ABBB88A2CBBDD7D414D082E921" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementBusinessSegmentsAxis_2541343EE1D21C9FB5C4D414D082CE49_terseLabel_en-US" xlink:label="lab_us-gaap_StatementBusinessSegmentsAxis_2541343EE1D21C9FB5C4D414D082CE49" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Segments [Axis]</link:label>
    <link:label id="lab_us-gaap_StatementBusinessSegmentsAxis_2541343EE1D21C9FB5C4D414D082CE49_label_en-US" xlink:label="lab_us-gaap_StatementBusinessSegmentsAxis_2541343EE1D21C9FB5C4D414D082CE49" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Segments [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_2541343EE1D21C9FB5C4D414D082CE49" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_2541343EE1D21C9FB5C4D414D082CE49" xlink:to="lab_us-gaap_StatementBusinessSegmentsAxis_2541343EE1D21C9FB5C4D414D082CE49" xlink:type="arc" />
    <link:label id="lab_us-gaap_SegmentDomain_000020CB68FF1F38B59ED414D0829935_terseLabel_en-US" xlink:label="lab_us-gaap_SegmentDomain_000020CB68FF1F38B59ED414D0829935" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Segments [Domain]</link:label>
    <link:label id="lab_us-gaap_SegmentDomain_000020CB68FF1F38B59ED414D0829935_label_en-US" xlink:label="lab_us-gaap_SegmentDomain_000020CB68FF1F38B59ED414D0829935" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Segments [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_000020CB68FF1F38B59ED414D0829935" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SegmentDomain_000020CB68FF1F38B59ED414D0829935" xlink:to="lab_us-gaap_SegmentDomain_000020CB68FF1F38B59ED414D0829935" xlink:type="arc" />
    <link:label id="lab_mdca_GlobalIntegratedAgenciesGroupAMember_C71822E33AAF7183301BD414D082200F_terseLabel_en-US" xlink:label="lab_mdca_GlobalIntegratedAgenciesGroupAMember_C71822E33AAF7183301BD414D082200F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Global Integrated Agencies, Group A</link:label>
    <link:label id="lab_mdca_GlobalIntegratedAgenciesGroupAMember_C71822E33AAF7183301BD414D082200F_label_en-US" xlink:label="lab_mdca_GlobalIntegratedAgenciesGroupAMember_C71822E33AAF7183301BD414D082200F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Global Integrated Agencies, Group A [Member]</link:label>
    <link:label id="lab_mdca_GlobalIntegratedAgenciesGroupAMember_C71822E33AAF7183301BD414D082200F_documentation_en-US" xlink:label="lab_mdca_GlobalIntegratedAgenciesGroupAMember_C71822E33AAF7183301BD414D082200F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Global Integrated Agencies, Group A [Member]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_GlobalIntegratedAgenciesGroupAMember" xlink:label="loc_mdca_GlobalIntegratedAgenciesGroupAMember_C71822E33AAF7183301BD414D082200F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_GlobalIntegratedAgenciesGroupAMember_C71822E33AAF7183301BD414D082200F" xlink:to="lab_mdca_GlobalIntegratedAgenciesGroupAMember_C71822E33AAF7183301BD414D082200F" xlink:type="arc" />
    <link:label id="lab_mdca_GlobalIntegratedAgenciesGroupBMember_DCDA810002882EF8A0A4D414D083D51E_terseLabel_en-US" xlink:label="lab_mdca_GlobalIntegratedAgenciesGroupBMember_DCDA810002882EF8A0A4D414D083D51E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Global Integrated Agencies, Group B</link:label>
    <link:label id="lab_mdca_GlobalIntegratedAgenciesGroupBMember_DCDA810002882EF8A0A4D414D083D51E_label_en-US" xlink:label="lab_mdca_GlobalIntegratedAgenciesGroupBMember_DCDA810002882EF8A0A4D414D083D51E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Global Integrated Agencies, Group B [Member]</link:label>
    <link:label id="lab_mdca_GlobalIntegratedAgenciesGroupBMember_DCDA810002882EF8A0A4D414D083D51E_documentation_en-US" xlink:label="lab_mdca_GlobalIntegratedAgenciesGroupBMember_DCDA810002882EF8A0A4D414D083D51E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Global Integrated Agencies, Group B [Member]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_GlobalIntegratedAgenciesGroupBMember" xlink:label="loc_mdca_GlobalIntegratedAgenciesGroupBMember_DCDA810002882EF8A0A4D414D083D51E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_GlobalIntegratedAgenciesGroupBMember_DCDA810002882EF8A0A4D414D083D51E" xlink:to="lab_mdca_GlobalIntegratedAgenciesGroupBMember_DCDA810002882EF8A0A4D414D083D51E" xlink:type="arc" />
    <link:label id="lab_mdca_MediaServicesMember_E49A1B41A100E2C8D1A7D414D083DE3E_terseLabel_en-US" xlink:label="lab_mdca_MediaServicesMember_E49A1B41A100E2C8D1A7D414D083DE3E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Media Services</link:label>
    <link:label id="lab_mdca_MediaServicesMember_E49A1B41A100E2C8D1A7D414D083DE3E_label_en-US" xlink:label="lab_mdca_MediaServicesMember_E49A1B41A100E2C8D1A7D414D083DE3E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Media Services [Member]</link:label>
    <link:label id="lab_mdca_MediaServicesMember_E49A1B41A100E2C8D1A7D414D083DE3E_documentation_en-US" xlink:label="lab_mdca_MediaServicesMember_E49A1B41A100E2C8D1A7D414D083DE3E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Media Services [Member]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_MediaServicesMember" xlink:label="loc_mdca_MediaServicesMember_E49A1B41A100E2C8D1A7D414D083DE3E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_MediaServicesMember_E49A1B41A100E2C8D1A7D414D083DE3E" xlink:to="lab_mdca_MediaServicesMember_E49A1B41A100E2C8D1A7D414D083DE3E" xlink:type="arc" />
    <link:label id="lab_mdca_AllOtherMember_779B4CF8D19398E300B6D414D083F517_terseLabel_en-US" xlink:label="lab_mdca_AllOtherMember_779B4CF8D19398E300B6D414D083F517" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">All Other</link:label>
    <link:label id="lab_mdca_AllOtherMember_779B4CF8D19398E300B6D414D083F517_label_en-US" xlink:label="lab_mdca_AllOtherMember_779B4CF8D19398E300B6D414D083F517" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">All Other [Member]</link:label>
    <link:label id="lab_mdca_AllOtherMember_779B4CF8D19398E300B6D414D083F517_documentation_en-US" xlink:label="lab_mdca_AllOtherMember_779B4CF8D19398E300B6D414D083F517" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">All Other</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_AllOtherMember" xlink:label="loc_mdca_AllOtherMember_779B4CF8D19398E300B6D414D083F517" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_AllOtherMember_779B4CF8D19398E300B6D414D083F517" xlink:to="lab_mdca_AllOtherMember_779B4CF8D19398E300B6D414D083F517" xlink:type="arc" />
    <link:label id="lab_us-gaap_SegmentReportingInformationLineItems_40889CF8456B213E55E7D414D0836B18_terseLabel_en-US" xlink:label="lab_us-gaap_SegmentReportingInformationLineItems_40889CF8456B213E55E7D414D0836B18" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Segment Reporting Information [Line Items]</link:label>
    <link:label id="lab_us-gaap_SegmentReportingInformationLineItems_40889CF8456B213E55E7D414D0836B18_label_en-US" xlink:label="lab_us-gaap_SegmentReportingInformationLineItems_40889CF8456B213E55E7D414D0836B18" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Segment Reporting Information [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_40889CF8456B213E55E7D414D0836B18" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_40889CF8456B213E55E7D414D0836B18" xlink:to="lab_us-gaap_SegmentReportingInformationLineItems_40889CF8456B213E55E7D414D0836B18" xlink:type="arc" />
    <link:label id="lab_us-gaap_NumberOfReportableSegments_4EF78978BBBD112F4585D414D084EFDD_verboseLabel_en-US" xlink:label="lab_us-gaap_NumberOfReportableSegments_4EF78978BBBD112F4585D414D084EFDD" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Number of reportable segments</link:label>
    <link:label id="lab_us-gaap_NumberOfReportableSegments_4EF78978BBBD112F4585D414D084EFDD_label_en-US" xlink:label="lab_us-gaap_NumberOfReportableSegments_4EF78978BBBD112F4585D414D084EFDD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number of Reportable Segments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NumberOfReportableSegments" xlink:label="loc_us-gaap_NumberOfReportableSegments_4EF78978BBBD112F4585D414D084EFDD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NumberOfReportableSegments_4EF78978BBBD112F4585D414D084EFDD" xlink:to="lab_us-gaap_NumberOfReportableSegments_4EF78978BBBD112F4585D414D084EFDD" xlink:type="arc" />
    <link:label id="lab_us-gaap_NumberOfOperatingSegments_AFAC9C6279858C758699D414D084FA0F_terseLabel_en-US" xlink:label="lab_us-gaap_NumberOfOperatingSegments_AFAC9C6279858C758699D414D084FA0F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of operating segments</link:label>
    <link:label id="lab_us-gaap_NumberOfOperatingSegments_AFAC9C6279858C758699D414D084FA0F_label_en-US" xlink:label="lab_us-gaap_NumberOfOperatingSegments_AFAC9C6279858C758699D414D084FA0F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number of Operating Segments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NumberOfOperatingSegments" xlink:label="loc_us-gaap_NumberOfOperatingSegments_AFAC9C6279858C758699D414D084FA0F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NumberOfOperatingSegments_AFAC9C6279858C758699D414D084FA0F" xlink:to="lab_us-gaap_NumberOfOperatingSegments_AFAC9C6279858C758699D414D084FA0F" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingIncomeLoss_0520B4AFF40A82280F93D414D084736B_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingIncomeLoss_0520B4AFF40A82280F93D414D084736B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Segment operating income (loss)</link:label>
    <link:label id="lab_us-gaap_OperatingIncomeLoss_0520B4AFF40A82280F93D414D084736B_label_en-US" xlink:label="lab_us-gaap_OperatingIncomeLoss_0520B4AFF40A82280F93D414D084736B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Income (Loss)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_0520B4AFF40A82280F93D414D084736B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingIncomeLoss_0520B4AFF40A82280F93D414D084736B" xlink:to="lab_us-gaap_OperatingIncomeLoss_0520B4AFF40A82280F93D414D084736B" xlink:type="arc" />
    <link:label id="lab_mdca_EBITDA_D2A7B45D9C21CC8EB84DD414D08400B6_terseLabel_en-US" xlink:label="lab_mdca_EBITDA_D2A7B45D9C21CC8EB84DD414D08400B6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EBITDA</link:label>
    <link:label id="lab_mdca_EBITDA_D2A7B45D9C21CC8EB84DD414D08400B6_label_en-US" xlink:label="lab_mdca_EBITDA_D2A7B45D9C21CC8EB84DD414D08400B6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">EBITDA</link:label>
    <link:label id="lab_mdca_EBITDA_D2A7B45D9C21CC8EB84DD414D08400B6_documentation_en-US" xlink:label="lab_mdca_EBITDA_D2A7B45D9C21CC8EB84DD414D08400B6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">EBITDA</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_EBITDA" xlink:label="loc_mdca_EBITDA_D2A7B45D9C21CC8EB84DD414D08400B6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_EBITDA_D2A7B45D9C21CC8EB84DD414D08400B6" xlink:to="lab_mdca_EBITDA_D2A7B45D9C21CC8EB84DD414D08400B6" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestAndDebtExpense_8B9DD1EFABC2811A99F7D414D084B73D_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_InterestAndDebtExpense_8B9DD1EFABC2811A99F7D414D084B73D" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Interest expense and finance charges</link:label>
    <link:label id="lab_us-gaap_InterestAndDebtExpense_8B9DD1EFABC2811A99F7D414D084B73D_label_en-US" xlink:label="lab_us-gaap_InterestAndDebtExpense_8B9DD1EFABC2811A99F7D414D084B73D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest and Debt Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestAndDebtExpense" xlink:label="loc_us-gaap_InterestAndDebtExpense_8B9DD1EFABC2811A99F7D414D084B73D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestAndDebtExpense_8B9DD1EFABC2811A99F7D414D084B73D" xlink:to="lab_us-gaap_InterestAndDebtExpense_8B9DD1EFABC2811A99F7D414D084B73D" xlink:type="arc" />
    <link:label id="lab_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_45F9DA9D59BD641CFEF1D414D085F3D2_terseLabel_en-US" xlink:label="lab_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_45F9DA9D59BD641CFEF1D414D085F3D2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreign exchange gain (loss)</link:label>
    <link:label id="lab_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_45F9DA9D59BD641CFEF1D414D085F3D2_label_en-US" xlink:label="lab_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_45F9DA9D59BD641CFEF1D414D085F3D2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Foreign Currency Transaction Gain (Loss), before Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ForeignCurrencyTransactionGainLossBeforeTax" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_45F9DA9D59BD641CFEF1D414D085F3D2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_45F9DA9D59BD641CFEF1D414D085F3D2" xlink:to="lab_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_45F9DA9D59BD641CFEF1D414D085F3D2" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherNonoperatingIncomeExpense_E6ED543F9E34610D82B0D414D085FD81_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherNonoperatingIncomeExpense_E6ED543F9E34610D82B0D414D085FD81" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Other, net</link:label>
    <link:label id="lab_us-gaap_OtherNonoperatingIncomeExpense_E6ED543F9E34610D82B0D414D085FD81_label_en-US" xlink:label="lab_us-gaap_OtherNonoperatingIncomeExpense_E6ED543F9E34610D82B0D414D085FD81" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Nonoperating Income (Expense)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_E6ED543F9E34610D82B0D414D085FD81" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherNonoperatingIncomeExpense_E6ED543F9E34610D82B0D414D085FD81" xlink:to="lab_us-gaap_OtherNonoperatingIncomeExpense_E6ED543F9E34610D82B0D414D085FD81" xlink:type="arc" />
    <link:label id="lab_mdca_IncomeLossFromContinuingOperationsBeforeEquityInEarningsOfNonconsolidatedAffiliates_607CDE7B30B5770E7306D414D085E5D3_terseLabel_en-US" xlink:label="lab_mdca_IncomeLossFromContinuingOperationsBeforeEquityInEarningsOfNonconsolidatedAffiliates_607CDE7B30B5770E7306D414D085E5D3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income before equity in earnings (losses) of non-consolidated affiliates</link:label>
    <link:label id="lab_mdca_IncomeLossFromContinuingOperationsBeforeEquityInEarningsOfNonconsolidatedAffiliates_607CDE7B30B5770E7306D414D085E5D3_label_en-US" xlink:label="lab_mdca_IncomeLossFromContinuingOperationsBeforeEquityInEarningsOfNonconsolidatedAffiliates_607CDE7B30B5770E7306D414D085E5D3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Loss From Continuing Operations Before Equity In Earnings Of Non-consolidated Affiliates</link:label>
    <link:label id="lab_mdca_IncomeLossFromContinuingOperationsBeforeEquityInEarningsOfNonconsolidatedAffiliates_607CDE7B30B5770E7306D414D085E5D3_documentation_en-US" xlink:label="lab_mdca_IncomeLossFromContinuingOperationsBeforeEquityInEarningsOfNonconsolidatedAffiliates_607CDE7B30B5770E7306D414D085E5D3" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Income (Loss) From Continuing Operations before Equity in Earnings of Non-Consolidated Affiliates</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_IncomeLossFromContinuingOperationsBeforeEquityInEarningsOfNonconsolidatedAffiliates" xlink:label="loc_mdca_IncomeLossFromContinuingOperationsBeforeEquityInEarningsOfNonconsolidatedAffiliates_607CDE7B30B5770E7306D414D085E5D3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_IncomeLossFromContinuingOperationsBeforeEquityInEarningsOfNonconsolidatedAffiliates_607CDE7B30B5770E7306D414D085E5D3" xlink:to="lab_mdca_IncomeLossFromContinuingOperationsBeforeEquityInEarningsOfNonconsolidatedAffiliates_607CDE7B30B5770E7306D414D085E5D3" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeLossFromEquityMethodInvestments_07E04700A4520F19C76ED414D08584B0_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeLossFromEquityMethodInvestments_07E04700A4520F19C76ED414D08584B0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity in earnings (losses) of non-consolidated affiliates</link:label>
    <link:label id="lab_us-gaap_IncomeLossFromEquityMethodInvestments_07E04700A4520F19C76ED414D08584B0_label_en-US" xlink:label="lab_us-gaap_IncomeLossFromEquityMethodInvestments_07E04700A4520F19C76ED414D08584B0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income (Loss) from Equity Method Investments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_07E04700A4520F19C76ED414D08584B0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeLossFromEquityMethodInvestments_07E04700A4520F19C76ED414D08584B0" xlink:to="lab_us-gaap_IncomeLossFromEquityMethodInvestments_07E04700A4520F19C76ED414D08584B0" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProfitLoss_23BB829D3ECBDCC9845CD414D0853D69_verboseLabel_en-US" xlink:label="lab_us-gaap_ProfitLoss_23BB829D3ECBDCC9845CD414D0853D69" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Net income (loss)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_23BB829D3ECBDCC9845CD414D0853D69" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProfitLoss_23BB829D3ECBDCC9845CD414D0853D69" xlink:to="lab_us-gaap_ProfitLoss_23BB829D3ECBDCC9845CD414D0853D69" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_9DC1E1C534FC77B0B9B0D414D086D57D_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_9DC1E1C534FC77B0B9B0D414D086D57D" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Net income attributable to the noncontrolling interest</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_9DC1E1C534FC77B0B9B0D414D086D57D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_9DC1E1C534FC77B0B9B0D414D086D57D" xlink:to="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_9DC1E1C534FC77B0B9B0D414D086D57D" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetIncomeLoss_63FBF1EC934EBE833580D414D0868BE2_verboseLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLoss_63FBF1EC934EBE833580D414D0868BE2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Net income (loss) attributable to MDC Partners Inc.</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_63FBF1EC934EBE833580D414D0868BE2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetIncomeLoss_63FBF1EC934EBE833580D414D0868BE2" xlink:to="lab_us-gaap_NetIncomeLoss_63FBF1EC934EBE833580D414D0868BE2" xlink:type="arc" />
    <link:label id="lab_mdca_DepreciationDepletionAmortizationandImpairmentNonproduction_AB6620B48089B26C5995D414D0865594_negatedTerseLabel_en-US" xlink:label="lab_mdca_DepreciationDepletionAmortizationandImpairmentNonproduction_AB6620B48089B26C5995D414D0865594" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Depreciation and amortization</link:label>
    <link:label id="lab_mdca_DepreciationDepletionAmortizationandImpairmentNonproduction_AB6620B48089B26C5995D414D0865594_label_en-US" xlink:label="lab_mdca_DepreciationDepletionAmortizationandImpairmentNonproduction_AB6620B48089B26C5995D414D0865594" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Depreciation, Depletion, Amortization and Impairment, Nonproduction</link:label>
    <link:label id="lab_mdca_DepreciationDepletionAmortizationandImpairmentNonproduction_AB6620B48089B26C5995D414D0865594_documentation_en-US" xlink:label="lab_mdca_DepreciationDepletionAmortizationandImpairmentNonproduction_AB6620B48089B26C5995D414D0865594" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Depreciation, Depletion, Amortization and Impairment, Nonproduction</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_DepreciationDepletionAmortizationandImpairmentNonproduction" xlink:label="loc_mdca_DepreciationDepletionAmortizationandImpairmentNonproduction_AB6620B48089B26C5995D414D0865594" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_DepreciationDepletionAmortizationandImpairmentNonproduction_AB6620B48089B26C5995D414D0865594" xlink:to="lab_mdca_DepreciationDepletionAmortizationandImpairmentNonproduction_AB6620B48089B26C5995D414D0865594" xlink:type="arc" />
    <link:label id="lab_us-gaap_AssetImpairmentCharges_27B9456DC83AE298E04ED414D086D551_negatedLabel_en-US" xlink:label="lab_us-gaap_AssetImpairmentCharges_27B9456DC83AE298E04ED414D086D551" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Asset Impairment Charges</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetImpairmentCharges" xlink:label="loc_us-gaap_AssetImpairmentCharges_27B9456DC83AE298E04ED414D086D551" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetImpairmentCharges_27B9456DC83AE298E04ED414D086D551" xlink:to="lab_us-gaap_AssetImpairmentCharges_27B9456DC83AE298E04ED414D086D551" xlink:type="arc" />
    <link:label id="lab_us-gaap_DepreciationAndAmortization_0029BA328C5912082A7CD414D086B575_terseLabel_en-US" xlink:label="lab_us-gaap_DepreciationAndAmortization_0029BA328C5912082A7CD414D086B575" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Depreciation, Depletion and Amortization, Nonproduction</link:label>
    <link:label id="lab_us-gaap_DepreciationAndAmortization_0029BA328C5912082A7CD414D086B575_label_en-US" xlink:label="lab_us-gaap_DepreciationAndAmortization_0029BA328C5912082A7CD414D086B575" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Depreciation, Depletion and Amortization, Nonproduction</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DepreciationAndAmortization" xlink:label="loc_us-gaap_DepreciationAndAmortization_0029BA328C5912082A7CD414D086B575" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DepreciationAndAmortization_0029BA328C5912082A7CD414D086B575" xlink:to="lab_us-gaap_DepreciationAndAmortization_0029BA328C5912082A7CD414D086B575" xlink:type="arc" />
    <link:label id="lab_us-gaap_Depreciation_871E616B45E534E99CACD414D086E46D_verboseLabel_en-US" xlink:label="lab_us-gaap_Depreciation_871E616B45E534E99CACD414D086E46D" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Depreciation</link:label>
    <link:label id="lab_us-gaap_Depreciation_871E616B45E534E99CACD414D086E46D_label_en-US" xlink:label="lab_us-gaap_Depreciation_871E616B45E534E99CACD414D086E46D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Depreciation</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Depreciation" xlink:label="loc_us-gaap_Depreciation_871E616B45E534E99CACD414D086E46D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Depreciation_871E616B45E534E99CACD414D086E46D" xlink:to="lab_us-gaap_Depreciation_871E616B45E534E99CACD414D086E46D" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensation_83CD8B4047621B838AC1D414D087ECF5_negatedLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensation_83CD8B4047621B838AC1D414D087ECF5" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Stock-based compensation</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensation_83CD8B4047621B838AC1D414D087ECF5_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensation_83CD8B4047621B838AC1D414D087ECF5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Payment Arrangement, Noncash Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaap_ShareBasedCompensation_83CD8B4047621B838AC1D414D087ECF5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensation_83CD8B4047621B838AC1D414D087ECF5" xlink:to="lab_us-gaap_ShareBasedCompensation_83CD8B4047621B838AC1D414D087ECF5" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_85BF6B5735846E1B097AD414D087E202_verboseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_85BF6B5735846E1B097AD414D087E202" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Change in contingent purchase price obligation</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_85BF6B5735846E1B097AD414D087E202" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_85BF6B5735846E1B097AD414D087E202" xlink:to="lab_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_85BF6B5735846E1B097AD414D087E202" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromPaymentsToMinorityShareholders_FA23CAF605D997032E25D414D087026A_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromPaymentsToMinorityShareholders_FA23CAF605D997032E25D414D087026A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from (Payments to) Noncontrolling Interests</link:label>
    <link:label id="lab_us-gaap_ProceedsFromPaymentsToMinorityShareholders_FA23CAF605D997032E25D414D087026A_label_en-US" xlink:label="lab_us-gaap_ProceedsFromPaymentsToMinorityShareholders_FA23CAF605D997032E25D414D087026A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from (Payments to) Noncontrolling Interests</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromPaymentsToMinorityShareholders" xlink:label="loc_us-gaap_ProceedsFromPaymentsToMinorityShareholders_FA23CAF605D997032E25D414D087026A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromPaymentsToMinorityShareholders_FA23CAF605D997032E25D414D087026A" xlink:to="lab_us-gaap_ProceedsFromPaymentsToMinorityShareholders_FA23CAF605D997032E25D414D087026A" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_5E40F5673FC603ABC55ED414D0870B20_terseLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_5E40F5673FC603ABC55ED414D0870B20" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capital expenditures</link:label>
    <link:label id="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_5E40F5673FC603ABC55ED414D0870B20_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_5E40F5673FC603ABC55ED414D0870B20" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments to Acquire Property, Plant, and Equipment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_5E40F5673FC603ABC55ED414D0870B20" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_5E40F5673FC603ABC55ED414D0870B20" xlink:to="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_5E40F5673FC603ABC55ED414D0870B20" xlink:type="arc" />
    <link:label id="lab_mdca_AccretiononConvertiblePreferredShares_C86F6960C5CF00DD2258D414D087203A_terseLabel_en-US" xlink:label="lab_mdca_AccretiononConvertiblePreferredShares_C86F6960C5CF00DD2258D414D087203A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accretion on Convertible Preferred Shares</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_AccretiononConvertiblePreferredShares" xlink:label="loc_mdca_AccretiononConvertiblePreferredShares_C86F6960C5CF00DD2258D414D087203A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_AccretiononConvertiblePreferredShares_C86F6960C5CF00DD2258D414D087203A" xlink:to="lab_mdca_AccretiononConvertiblePreferredShares_C86F6960C5CF00DD2258D414D087203A" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeLossFromContinuingOperations_78BDA3C674C610162C72D414D08888D1_verboseLabel_en-US" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperations_78BDA3C674C610162C72D414D08888D1" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeLossFromContinuingOperations" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperations_78BDA3C674C610162C72D414D08888D1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperations_78BDA3C674C610162C72D414D08888D1" xlink:to="lab_us-gaap_IncomeLossFromContinuingOperations_78BDA3C674C610162C72D414D08888D1" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueByBalanceSheetGroupingTable_A0095AFD78FA8698786CC01123B7C60E_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByBalanceSheetGroupingTable_A0095AFD78FA8698786CC01123B7C60E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, by Balance Sheet Grouping [Table]</link:label>
    <link:label id="lab_us-gaap_FairValueByBalanceSheetGroupingTable_A0095AFD78FA8698786CC01123B7C60E_label_en-US" xlink:label="lab_us-gaap_FairValueByBalanceSheetGroupingTable_A0095AFD78FA8698786CC01123B7C60E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, by Balance Sheet Grouping [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueByBalanceSheetGroupingTable" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingTable_A0095AFD78FA8698786CC01123B7C60E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_A0095AFD78FA8698786CC01123B7C60E" xlink:to="lab_us-gaap_FairValueByBalanceSheetGroupingTable_A0095AFD78FA8698786CC01123B7C60E" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis_6E50E74E2E91C59EFE02C01123B8DF60_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis_6E50E74E2E91C59EFE02C01123B8DF60" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Hierarchy and NAV [Axis]</link:label>
    <link:label id="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis_6E50E74E2E91C59EFE02C01123B8DF60_label_en-US" xlink:label="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis_6E50E74E2E91C59EFE02C01123B8DF60" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Hierarchy and NAV [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_6E50E74E2E91C59EFE02C01123B8DF60" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_6E50E74E2E91C59EFE02C01123B8DF60" xlink:to="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis_6E50E74E2E91C59EFE02C01123B8DF60" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_E9D54689C8D7B5B5415DC01123B93E32_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_E9D54689C8D7B5B5415DC01123B93E32" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Hierarchy and NAV [Domain]</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_E9D54689C8D7B5B5415DC01123B93E32_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_E9D54689C8D7B5B5415DC01123B93E32" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Hierarchy and NAV [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_E9D54689C8D7B5B5415DC01123B93E32" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_E9D54689C8D7B5B5415DC01123B93E32" xlink:to="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_E9D54689C8D7B5B5415DC01123B93E32" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueInputsLevel1Member_7C7E664619F0212F9D21C01123B99808_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel1Member_7C7E664619F0212F9D21C01123B99808" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Inputs, Level 1</link:label>
    <link:label id="lab_us-gaap_FairValueInputsLevel1Member_7C7E664619F0212F9D21C01123B99808_label_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel1Member_7C7E664619F0212F9D21C01123B99808" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Inputs, Level 1 [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_7C7E664619F0212F9D21C01123B99808" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueInputsLevel1Member_7C7E664619F0212F9D21C01123B99808" xlink:to="lab_us-gaap_FairValueInputsLevel1Member_7C7E664619F0212F9D21C01123B99808" xlink:type="arc" />
    <link:label id="lab_us-gaap_LongtermDebtTypeAxis_6C9E043C42FB0FEFB34FC01123B9315F_terseLabel_en-US" xlink:label="lab_us-gaap_LongtermDebtTypeAxis_6C9E043C42FB0FEFB34FC01123B9315F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Long-term Debt, Type [Axis]</link:label>
    <link:label id="lab_us-gaap_LongtermDebtTypeAxis_6C9E043C42FB0FEFB34FC01123B9315F_label_en-US" xlink:label="lab_us-gaap_LongtermDebtTypeAxis_6C9E043C42FB0FEFB34FC01123B9315F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Debt, Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_6C9E043C42FB0FEFB34FC01123B9315F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_6C9E043C42FB0FEFB34FC01123B9315F" xlink:to="lab_us-gaap_LongtermDebtTypeAxis_6C9E043C42FB0FEFB34FC01123B9315F" xlink:type="arc" />
    <link:label id="lab_us-gaap_LongtermDebtTypeDomain_E5AA03D301122557A927C01123BA55AF_terseLabel_en-US" xlink:label="lab_us-gaap_LongtermDebtTypeDomain_E5AA03D301122557A927C01123BA55AF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Long-term Debt, Type [Domain]</link:label>
    <link:label id="lab_us-gaap_LongtermDebtTypeDomain_E5AA03D301122557A927C01123BA55AF_label_en-US" xlink:label="lab_us-gaap_LongtermDebtTypeDomain_E5AA03D301122557A927C01123BA55AF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Debt, Type [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_E5AA03D301122557A927C01123BA55AF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_E5AA03D301122557A927C01123BA55AF" xlink:to="lab_us-gaap_LongtermDebtTypeDomain_E5AA03D301122557A927C01123BA55AF" xlink:type="arc" />
    <link:label id="lab_us-gaap_SeniorNotesMember_082D0A01D27B88623CE2C01123BAD814_terseLabel_en-US" xlink:label="lab_us-gaap_SeniorNotesMember_082D0A01D27B88623CE2C01123BAD814" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Senior Notes</link:label>
    <link:label id="lab_us-gaap_SeniorNotesMember_082D0A01D27B88623CE2C01123BAD814_label_en-US" xlink:label="lab_us-gaap_SeniorNotesMember_082D0A01D27B88623CE2C01123BAD814" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Senior Notes [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SeniorNotesMember" xlink:label="loc_us-gaap_SeniorNotesMember_082D0A01D27B88623CE2C01123BAD814" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SeniorNotesMember_082D0A01D27B88623CE2C01123BAD814" xlink:to="lab_us-gaap_SeniorNotesMember_082D0A01D27B88623CE2C01123BAD814" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_7652D75FACA4C05E04EBC01123BA1D65_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_7652D75FACA4C05E04EBC01123BA1D65" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]</link:label>
    <link:label id="lab_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_7652D75FACA4C05E04EBC01123BA1D65_label_en-US" xlink:label="lab_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_7652D75FACA4C05E04EBC01123BA1D65" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:label="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_7652D75FACA4C05E04EBC01123BA1D65" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_7652D75FACA4C05E04EBC01123BA1D65" xlink:to="lab_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_7652D75FACA4C05E04EBC01123BA1D65" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilitiesAbstract_7A49506898EE648DD42DC01123BAF8F9_verboseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesAbstract_7A49506898EE648DD42DC01123BAF8F9" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Liabilities:</link:label>
    <link:label id="lab_us-gaap_LiabilitiesAbstract_7A49506898EE648DD42DC01123BAF8F9_label_en-US" xlink:label="lab_us-gaap_LiabilitiesAbstract_7A49506898EE648DD42DC01123BAF8F9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesAbstract" xlink:label="loc_us-gaap_LiabilitiesAbstract_7A49506898EE648DD42DC01123BAF8F9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesAbstract_7A49506898EE648DD42DC01123BAF8F9" xlink:to="lab_us-gaap_LiabilitiesAbstract_7A49506898EE648DD42DC01123BAF8F9" xlink:type="arc" />
    <link:label id="lab_us-gaap_LongTermDebt_5F50F2116FC573227840C01123BBE24D_verboseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebt_5F50F2116FC573227840C01123BBE24D" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Long term debt, Carrying Amount</link:label>
    <link:label id="lab_us-gaap_LongTermDebt_5F50F2116FC573227840C01123BBE24D_label_en-US" xlink:label="lab_us-gaap_LongTermDebt_5F50F2116FC573227840C01123BBE24D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Debt</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebt" xlink:label="loc_us-gaap_LongTermDebt_5F50F2116FC573227840C01123BBE24D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermDebt_5F50F2116FC573227840C01123BBE24D" xlink:to="lab_us-gaap_LongTermDebt_5F50F2116FC573227840C01123BBE24D" xlink:type="arc" />
    <link:label id="lab_us-gaap_LongTermDebtFairValue_4E461CEBC11D0F78FA9CC01123BB7D38_verboseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtFairValue_4E461CEBC11D0F78FA9CC01123BB7D38" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Long term debt, Fair Value</link:label>
    <link:label id="lab_us-gaap_LongTermDebtFairValue_4E461CEBC11D0F78FA9CC01123BB7D38_label_en-US" xlink:label="lab_us-gaap_LongTermDebtFairValue_4E461CEBC11D0F78FA9CC01123BB7D38" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Debt, Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtFairValue" xlink:label="loc_us-gaap_LongTermDebtFairValue_4E461CEBC11D0F78FA9CC01123BB7D38" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermDebtFairValue_4E461CEBC11D0F78FA9CC01123BB7D38" xlink:to="lab_us-gaap_LongTermDebtFairValue_4E461CEBC11D0F78FA9CC01123BB7D38" xlink:type="arc" />
    <link:label id="lab_mdca_DerivativeDiscountRate_0A9AE73F58B9E9EC53DBC01123BBA5F8_terseLabel_en-US" xlink:label="lab_mdca_DerivativeDiscountRate_0A9AE73F58B9E9EC53DBC01123BBA5F8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Discount rate</link:label>
    <link:label id="lab_mdca_DerivativeDiscountRate_0A9AE73F58B9E9EC53DBC01123BBA5F8_label_en-US" xlink:label="lab_mdca_DerivativeDiscountRate_0A9AE73F58B9E9EC53DBC01123BBA5F8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative, Discount Rate</link:label>
    <link:label id="lab_mdca_DerivativeDiscountRate_0A9AE73F58B9E9EC53DBC01123BBA5F8_documentation_en-US" xlink:label="lab_mdca_DerivativeDiscountRate_0A9AE73F58B9E9EC53DBC01123BBA5F8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Derivative, Discount Rate</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_DerivativeDiscountRate" xlink:label="loc_mdca_DerivativeDiscountRate_0A9AE73F58B9E9EC53DBC01123BBA5F8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_DerivativeDiscountRate_0A9AE73F58B9E9EC53DBC01123BBA5F8" xlink:to="lab_mdca_DerivativeDiscountRate_0A9AE73F58B9E9EC53DBC01123BBA5F8" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionContingentConsiderationTextBlock_9C24AB00AAC0969E31A6C01124359145_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionContingentConsiderationTextBlock_9C24AB00AAC0969E31A6C01124359145" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Changes in Contingent Deferred Acquisition Consideration</link:label>
    <link:label id="lab_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionContingentConsiderationTextBlock_9C24AB00AAC0969E31A6C01124359145_label_en-US" xlink:label="lab_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionContingentConsiderationTextBlock_9C24AB00AAC0969E31A6C01124359145" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Business Acquisitions by Acquisition, Contingent Consideration [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionContingentConsiderationTextBlock" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionContingentConsiderationTextBlock_9C24AB00AAC0969E31A6C01124359145" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionContingentConsiderationTextBlock_9C24AB00AAC0969E31A6C01124359145" xlink:to="lab_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionContingentConsiderationTextBlock_9C24AB00AAC0969E31A6C01124359145" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubsequentEventTypeAxis_1B5711B35A031F48B3BDC011247F7417_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventTypeAxis_1B5711B35A031F48B3BDC011247F7417" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsequent Event Type [Axis]</link:label>
    <link:label id="lab_us-gaap_SubsequentEventTypeAxis_1B5711B35A031F48B3BDC011247F7417_label_en-US" xlink:label="lab_us-gaap_SubsequentEventTypeAxis_1B5711B35A031F48B3BDC011247F7417" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsequent Event Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_1B5711B35A031F48B3BDC011247F7417" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_1B5711B35A031F48B3BDC011247F7417" xlink:to="lab_us-gaap_SubsequentEventTypeAxis_1B5711B35A031F48B3BDC011247F7417" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubsequentEventTypeDomain_C4BB961AFA5B48BD8CE1C011247FB6D5_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventTypeDomain_C4BB961AFA5B48BD8CE1C011247FB6D5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsequent Event Type [Domain]</link:label>
    <link:label id="lab_us-gaap_SubsequentEventTypeDomain_C4BB961AFA5B48BD8CE1C011247FB6D5_label_en-US" xlink:label="lab_us-gaap_SubsequentEventTypeDomain_C4BB961AFA5B48BD8CE1C011247FB6D5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsequent Event Type [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_C4BB961AFA5B48BD8CE1C011247FB6D5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_C4BB961AFA5B48BD8CE1C011247FB6D5" xlink:to="lab_us-gaap_SubsequentEventTypeDomain_C4BB961AFA5B48BD8CE1C011247FB6D5" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubsequentEventMember_C20EC01394E498CEB092C011247FDCAE_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventMember_C20EC01394E498CEB092C011247FDCAE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsequent Event [Member]</link:label>
    <link:label id="lab_us-gaap_SubsequentEventMember_C20EC01394E498CEB092C011247FDCAE_label_en-US" xlink:label="lab_us-gaap_SubsequentEventMember_C20EC01394E498CEB092C011247FDCAE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsequent Event [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SubsequentEventMember" xlink:label="loc_us-gaap_SubsequentEventMember_C20EC01394E498CEB092C011247FDCAE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventMember_C20EC01394E498CEB092C011247FDCAE" xlink:to="lab_us-gaap_SubsequentEventMember_C20EC01394E498CEB092C011247FDCAE" xlink:type="arc" />
    <link:label id="lab_mdca_DebtAcquired_D39D7E4EE11173664F49C0112481AF47_terseLabel_en-US" xlink:label="lab_mdca_DebtAcquired_D39D7E4EE11173664F49C0112481AF47" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Acquired</link:label>
    <link:label id="lab_mdca_DebtAcquired_D39D7E4EE11173664F49C0112481AF47_label_en-US" xlink:label="lab_mdca_DebtAcquired_D39D7E4EE11173664F49C0112481AF47" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Acquired</link:label>
    <link:label id="lab_mdca_DebtAcquired_D39D7E4EE11173664F49C0112481AF47_documentation_en-US" xlink:label="lab_mdca_DebtAcquired_D39D7E4EE11173664F49C0112481AF47" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Debt Acquired</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_DebtAcquired" xlink:label="loc_mdca_DebtAcquired_D39D7E4EE11173664F49C0112481AF47" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_DebtAcquired_D39D7E4EE11173664F49C0112481AF47" xlink:to="lab_mdca_DebtAcquired_D39D7E4EE11173664F49C0112481AF47" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentFaceAmount_78C18F8363A583F6569FC0112482409A_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentFaceAmount_78C18F8363A583F6569FC0112482409A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aggregate principal amount</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentFaceAmount_78C18F8363A583F6569FC0112482409A_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentFaceAmount_78C18F8363A583F6569FC0112482409A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Face Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_78C18F8363A583F6569FC0112482409A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentFaceAmount_78C18F8363A583F6569FC0112482409A" xlink:to="lab_us-gaap_DebtInstrumentFaceAmount_78C18F8363A583F6569FC0112482409A" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage_37E0A2B4C660E1E4FD86C0112482BFDF_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage_37E0A2B4C660E1E4FD86C0112482BFDF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest rate, stated percentage</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage_37E0A2B4C660E1E4FD86C0112482BFDF_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage_37E0A2B4C660E1E4FD86C0112482BFDF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Interest Rate, Stated Percentage</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_37E0A2B4C660E1E4FD86C0112482BFDF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_37E0A2B4C660E1E4FD86C0112482BFDF" xlink:to="lab_us-gaap_DebtInstrumentInterestRateStatedPercentage_37E0A2B4C660E1E4FD86C0112482BFDF" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_0938A45E353288B18433C01124823038_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_0938A45E353288B18433C01124823038" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_0938A45E353288B18433C01124823038_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_0938A45E353288B18433C01124823038" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_0938A45E353288B18433C01124823038" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_0938A45E353288B18433C01124823038" xlink:to="lab_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_0938A45E353288B18433C01124823038" xlink:type="arc" />
    <link:label id="lab_us-gaap_LongTermDebt_3B43D39909321B2C3B21C01124828F01_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebt_3B43D39909321B2C3B21C01124828F01" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Long-term Debt</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebt" xlink:label="loc_us-gaap_LongTermDebt_3B43D39909321B2C3B21C01124828F01" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermDebt_3B43D39909321B2C3B21C01124828F01" xlink:to="lab_us-gaap_LongTermDebt_3B43D39909321B2C3B21C01124828F01" xlink:type="arc" />
    <link:label id="lab_mdca_LongtermDebtAccruedInterest_D175E4FDC50DD2E9ED0BC01124825FA8_terseLabel_en-US" xlink:label="lab_mdca_LongtermDebtAccruedInterest_D175E4FDC50DD2E9ED0BC01124825FA8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Long-term Debt, Accrued Interest</link:label>
    <link:label id="lab_mdca_LongtermDebtAccruedInterest_D175E4FDC50DD2E9ED0BC01124825FA8_label_en-US" xlink:label="lab_mdca_LongtermDebtAccruedInterest_D175E4FDC50DD2E9ED0BC01124825FA8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Debt, Accrued Interest</link:label>
    <link:label id="lab_mdca_LongtermDebtAccruedInterest_D175E4FDC50DD2E9ED0BC01124825FA8_documentation_en-US" xlink:label="lab_mdca_LongtermDebtAccruedInterest_D175E4FDC50DD2E9ED0BC01124825FA8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Long-term Debt, Accrued Interest</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_LongtermDebtAccruedInterest" xlink:label="loc_mdca_LongtermDebtAccruedInterest_D175E4FDC50DD2E9ED0BC01124825FA8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_LongtermDebtAccruedInterest_D175E4FDC50DD2E9ED0BC01124825FA8" xlink:to="lab_mdca_LongtermDebtAccruedInterest_D175E4FDC50DD2E9ED0BC01124825FA8" xlink:type="arc" />
    <link:label id="lab_us-gaap_GainsLossesOnExtinguishmentOfDebt_B0CA5AE77AE8BDFF478DC011248320C6_terseLabel_en-US" xlink:label="lab_us-gaap_GainsLossesOnExtinguishmentOfDebt_B0CA5AE77AE8BDFF478DC011248320C6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gain (Loss) on Extinguishment of Debt</link:label>
    <link:label id="lab_us-gaap_GainsLossesOnExtinguishmentOfDebt_B0CA5AE77AE8BDFF478DC011248320C6_label_en-US" xlink:label="lab_us-gaap_GainsLossesOnExtinguishmentOfDebt_B0CA5AE77AE8BDFF478DC011248320C6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gain (Loss) on Extinguishment of Debt</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_B0CA5AE77AE8BDFF478DC011248320C6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_B0CA5AE77AE8BDFF478DC011248320C6" xlink:to="lab_us-gaap_GainsLossesOnExtinguishmentOfDebt_B0CA5AE77AE8BDFF478DC011248320C6" xlink:type="arc" />
    <link:label id="lab_us-gaap_MinorityInterestDisclosureTextBlock_0BFE3F0A98410118E1BAC01123FBBC48_terseLabel_en-US" xlink:label="lab_us-gaap_MinorityInterestDisclosureTextBlock_0BFE3F0A98410118E1BAC01123FBBC48" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Noncontrolling and Redeemable Noncontrolling Interests</link:label>
    <link:label id="lab_us-gaap_MinorityInterestDisclosureTextBlock_0BFE3F0A98410118E1BAC01123FBBC48_label_en-US" xlink:label="lab_us-gaap_MinorityInterestDisclosureTextBlock_0BFE3F0A98410118E1BAC01123FBBC48" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Noncontrolling Interest Disclosure [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MinorityInterestDisclosureTextBlock" xlink:label="loc_us-gaap_MinorityInterestDisclosureTextBlock_0BFE3F0A98410118E1BAC01123FBBC48" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MinorityInterestDisclosureTextBlock_0BFE3F0A98410118E1BAC01123FBBC48" xlink:to="lab_us-gaap_MinorityInterestDisclosureTextBlock_0BFE3F0A98410118E1BAC01123FBBC48" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementOfStockholdersEquityAbstract_B5683213F0214253039CC01124D0CE63_label_en-US" xlink:label="lab_us-gaap_StatementOfStockholdersEquityAbstract_B5683213F0214253039CC01124D0CE63" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement of Stockholders' Equity [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementOfStockholdersEquityAbstract" xlink:label="loc_us-gaap_StatementOfStockholdersEquityAbstract_B5683213F0214253039CC01124D0CE63" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementOfStockholdersEquityAbstract_B5683213F0214253039CC01124D0CE63" xlink:to="lab_us-gaap_StatementOfStockholdersEquityAbstract_B5683213F0214253039CC01124D0CE63" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementTable_9D7CB27A745649A0C28FC01124D19178_terseLabel_en-US" xlink:label="lab_us-gaap_StatementTable_9D7CB27A745649A0C28FC01124D19178" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Statement [Table]</link:label>
    <link:label id="lab_us-gaap_StatementTable_9D7CB27A745649A0C28FC01124D19178_label_en-US" xlink:label="lab_us-gaap_StatementTable_9D7CB27A745649A0C28FC01124D19178" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_9D7CB27A745649A0C28FC01124D19178" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementTable_9D7CB27A745649A0C28FC01124D19178" xlink:to="lab_us-gaap_StatementTable_9D7CB27A745649A0C28FC01124D19178" xlink:type="arc" />
    <link:label id="lab_mdca_Series4ConvertiblePreferredStockMember_A1AD2E00DA5EF585DE82C01124D1C36F_verboseLabel_en-US" xlink:label="lab_mdca_Series4ConvertiblePreferredStockMember_A1AD2E00DA5EF585DE82C01124D1C36F" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Series 4 Convertible Preferred Stock [Member]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_Series4ConvertiblePreferredStockMember" xlink:label="loc_mdca_Series4ConvertiblePreferredStockMember_A1AD2E00DA5EF585DE82C01124D1C36F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_Series4ConvertiblePreferredStockMember_A1AD2E00DA5EF585DE82C01124D1C36F" xlink:to="lab_mdca_Series4ConvertiblePreferredStockMember_A1AD2E00DA5EF585DE82C01124D1C36F" xlink:type="arc" />
    <link:label id="lab_us-gaap_RetainedEarningsMember_B11E7F508CE8A9438430C01124D301DC_verboseLabel_en-US" xlink:label="lab_us-gaap_RetainedEarningsMember_B11E7F508CE8A9438430C01124D301DC" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Accumulated Deficit</link:label>
    <link:label id="lab_us-gaap_RetainedEarningsMember_B11E7F508CE8A9438430C01124D301DC_label_en-US" xlink:label="lab_us-gaap_RetainedEarningsMember_B11E7F508CE8A9438430C01124D301DC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Retained Earnings [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:label="loc_us-gaap_RetainedEarningsMember_B11E7F508CE8A9438430C01124D301DC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RetainedEarningsMember_B11E7F508CE8A9438430C01124D301DC" xlink:to="lab_us-gaap_RetainedEarningsMember_B11E7F508CE8A9438430C01124D301DC" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember_2017BE32B309FC923350C01124D3052A_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember_2017BE32B309FC923350C01124D3052A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accumulated Other Comprehensive Income</link:label>
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember_2017BE32B309FC923350C01124D3052A_label_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember_2017BE32B309FC923350C01124D3052A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">AOCI Attributable to Parent [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_2017BE32B309FC923350C01124D3052A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_2017BE32B309FC923350C01124D3052A" xlink:to="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember_2017BE32B309FC923350C01124D3052A" xlink:type="arc" />
    <link:label id="lab_us-gaap_NoncontrollingInterestMember_CCFBB969495E83C18AACC01124D3DE86_terseLabel_en-US" xlink:label="lab_us-gaap_NoncontrollingInterestMember_CCFBB969495E83C18AACC01124D3DE86" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Noncontrolling Interest</link:label>
    <link:label id="lab_us-gaap_NoncontrollingInterestMember_CCFBB969495E83C18AACC01124D3DE86_label_en-US" xlink:label="lab_us-gaap_NoncontrollingInterestMember_CCFBB969495E83C18AACC01124D3DE86" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Noncontrolling Interest [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NoncontrollingInterestMember" xlink:label="loc_us-gaap_NoncontrollingInterestMember_CCFBB969495E83C18AACC01124D3DE86" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NoncontrollingInterestMember_CCFBB969495E83C18AACC01124D3DE86" xlink:to="lab_us-gaap_NoncontrollingInterestMember_CCFBB969495E83C18AACC01124D3DE86" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementLineItems_7116DA83795C7A0FA4ADC01124D3CFD8_terseLabel_en-US" xlink:label="lab_us-gaap_StatementLineItems_7116DA83795C7A0FA4ADC01124D3CFD8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Statement [Line Items]</link:label>
    <link:label id="lab_us-gaap_StatementLineItems_7116DA83795C7A0FA4ADC01124D3CFD8_label_en-US" xlink:label="lab_us-gaap_StatementLineItems_7116DA83795C7A0FA4ADC01124D3CFD8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_7116DA83795C7A0FA4ADC01124D3CFD8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementLineItems_7116DA83795C7A0FA4ADC01124D3CFD8" xlink:to="lab_us-gaap_StatementLineItems_7116DA83795C7A0FA4ADC01124D3CFD8" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_F81169CF9B77723C1276C01124D4A3C7_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_F81169CF9B77723C1276C01124D4A3C7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Stockholders' Equity [Roll Forward]</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_F81169CF9B77723C1276C01124D4A3C7_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_F81169CF9B77723C1276C01124D4A3C7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Stockholders' Equity [Roll Forward]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_F81169CF9B77723C1276C01124D4A3C7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_F81169CF9B77723C1276C01124D4A3C7" xlink:to="lab_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_F81169CF9B77723C1276C01124D4A3C7" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_8C4B958385393A747006C01124D4135B_periodStartLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_8C4B958385393A747006C01124D4135B" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Balance</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_8C4B958385393A747006C01124D4135B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_8C4B958385393A747006C01124D4135B" xlink:to="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_8C4B958385393A747006C01124D4135B" xlink:type="arc" />
    <link:label id="lab_us-gaap_SharesOutstanding_E197FB0C43F490EE9C05C01124D4D693_periodStartLabel_en-US" xlink:label="lab_us-gaap_SharesOutstanding_E197FB0C43F490EE9C05C01124D4D693" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Balance (in shares)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharesOutstanding" xlink:label="loc_us-gaap_SharesOutstanding_E197FB0C43F490EE9C05C01124D4D693" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharesOutstanding_E197FB0C43F490EE9C05C01124D4D693" xlink:to="lab_us-gaap_SharesOutstanding_E197FB0C43F490EE9C05C01124D4D693" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommonStockSharesOutstanding_BAE13B5926FFA7DD8CCCC01124D40280_periodStartLabel_en-US" xlink:label="lab_us-gaap_CommonStockSharesOutstanding_BAE13B5926FFA7DD8CCCC01124D40280" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Common stock, balance (in shares)</link:label>
    <link:label id="lab_us-gaap_CommonStockSharesOutstanding_BAE13B5926FFA7DD8CCCC01124D40280_label_en-US" xlink:label="lab_us-gaap_CommonStockSharesOutstanding_BAE13B5926FFA7DD8CCCC01124D40280" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock, Shares, Outstanding</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_BAE13B5926FFA7DD8CCCC01124D40280" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockSharesOutstanding_BAE13B5926FFA7DD8CCCC01124D40280" xlink:to="lab_us-gaap_CommonStockSharesOutstanding_BAE13B5926FFA7DD8CCCC01124D40280" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTax_3A41935E7417196A274CC01124D51C67_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTax_3A41935E7417196A274CC01124D51C67" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other comprehensive income</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_3A41935E7417196A274CC01124D51C67" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_3A41935E7417196A274CC01124D51C67" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTax_3A41935E7417196A274CC01124D51C67" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues_4FB68B5D26D8B72BD43EC01124D55FFA_verboseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues_4FB68B5D26D8B72BD43EC01124D55FFA" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Issuance of common and preference shares (in shares)</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues_4FB68B5D26D8B72BD43EC01124D55FFA_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues_4FB68B5D26D8B72BD43EC01124D55FFA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Shares, New Issues</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_4FB68B5D26D8B72BD43EC01124D55FFA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_4FB68B5D26D8B72BD43EC01124D55FFA" xlink:to="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues_4FB68B5D26D8B72BD43EC01124D55FFA" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_42D10CCEA600A837B812C01124D5CE12_verboseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_42D10CCEA600A837B812C01124D5CE12" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Issuance of restricted stock</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_42D10CCEA600A837B812C01124D5CE12_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_42D10CCEA600A837B812C01124D5CE12" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_42D10CCEA600A837B812C01124D5CE12" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_42D10CCEA600A837B812C01124D5CE12" xlink:to="lab_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_42D10CCEA600A837B812C01124D5CE12" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_8662D5B154A767E4B456C01124D5197F_verboseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_8662D5B154A767E4B456C01124D5197F" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Issuance of restricted stock (in shares)</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_8662D5B154A767E4B456C01124D5197F_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_8662D5B154A767E4B456C01124D5197F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_8662D5B154A767E4B456C01124D5197F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_8662D5B154A767E4B456C01124D5197F" xlink:to="lab_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_8662D5B154A767E4B456C01124D5197F" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_E29EFE2F63B63F310B58C01124D5EF39_negatedLabel_en-US" xlink:label="lab_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_E29EFE2F63B63F310B58C01124D5EF39" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Shares acquired and cancelled</link:label>
    <link:label id="lab_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_E29EFE2F63B63F310B58C01124D5EF39_label_en-US" xlink:label="lab_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_E29EFE2F63B63F310B58C01124D5EF39" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Repurchased and Retired During Period, Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodValue" xlink:label="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_E29EFE2F63B63F310B58C01124D5EF39" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_E29EFE2F63B63F310B58C01124D5EF39" xlink:to="lab_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_E29EFE2F63B63F310B58C01124D5EF39" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_FA400D7FD472DFCBFD7AC01124D67CA9_negatedLabel_en-US" xlink:label="lab_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_FA400D7FD472DFCBFD7AC01124D67CA9" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Shares acquired and cancelled (in shares)</link:label>
    <link:label id="lab_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_FA400D7FD472DFCBFD7AC01124D67CA9_label_en-US" xlink:label="lab_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_FA400D7FD472DFCBFD7AC01124D67CA9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Repurchased and Retired During Period, Shares</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodShares" xlink:label="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_FA400D7FD472DFCBFD7AC01124D67CA9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_FA400D7FD472DFCBFD7AC01124D67CA9" xlink:to="lab_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_FA400D7FD472DFCBFD7AC01124D67CA9" xlink:type="arc" />
    <link:label id="lab_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_A561CE83DB6D5D791B3DC01124D6D16E_terseLabel_en-US" xlink:label="lab_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_A561CE83DB6D5D791B3DC01124D6D16E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock-based compensation</link:label>
    <link:label id="lab_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_A561CE83DB6D5D791B3DC01124D6D16E_label_en-US" xlink:label="lab_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_A561CE83DB6D5D791B3DC01124D6D16E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">APIC, Share-based Payment Arrangement, Increase for Cost Recognition</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_A561CE83DB6D5D791B3DC01124D6D16E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_A561CE83DB6D5D791B3DC01124D6D16E" xlink:to="lab_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_A561CE83DB6D5D791B3DC01124D6D16E" xlink:type="arc" />
    <link:label id="lab_mdca_IncreaseDecreaseinRedemptionValueofRedeemableNoncontrollingInterests_1ADC1505AF290D952F98C01124D6128D_terseLabel_en-US" xlink:label="lab_mdca_IncreaseDecreaseinRedemptionValueofRedeemableNoncontrollingInterests_1ADC1505AF290D952F98C01124D6128D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Changes in redemption value of redeemable noncontrolling interests</link:label>
    <link:label id="lab_mdca_IncreaseDecreaseinRedemptionValueofRedeemableNoncontrollingInterests_1ADC1505AF290D952F98C01124D6128D_label_en-US" xlink:label="lab_mdca_IncreaseDecreaseinRedemptionValueofRedeemableNoncontrollingInterests_1ADC1505AF290D952F98C01124D6128D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Redemption Value of Redeemable Noncontrolling Interests</link:label>
    <link:label id="lab_mdca_IncreaseDecreaseinRedemptionValueofRedeemableNoncontrollingInterests_1ADC1505AF290D952F98C01124D6128D_documentation_en-US" xlink:label="lab_mdca_IncreaseDecreaseinRedemptionValueofRedeemableNoncontrollingInterests_1ADC1505AF290D952F98C01124D6128D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Redemption Value of Redeemable Noncontrolling Interests</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_IncreaseDecreaseinRedemptionValueofRedeemableNoncontrollingInterests" xlink:label="loc_mdca_IncreaseDecreaseinRedemptionValueofRedeemableNoncontrollingInterests_1ADC1505AF290D952F98C01124D6128D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_IncreaseDecreaseinRedemptionValueofRedeemableNoncontrollingInterests_1ADC1505AF290D952F98C01124D6128D" xlink:to="lab_mdca_IncreaseDecreaseinRedemptionValueofRedeemableNoncontrollingInterests_1ADC1505AF290D952F98C01124D6128D" xlink:type="arc" />
    <link:label id="lab_us-gaap_MinorityInterestChangeInRedemptionValue_E00A4A36F3E0062F22A3C01124D691AC_verboseLabel_en-US" xlink:label="lab_us-gaap_MinorityInterestChangeInRedemptionValue_E00A4A36F3E0062F22A3C01124D691AC" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Changes in ownership interest</link:label>
    <link:label id="lab_us-gaap_MinorityInterestChangeInRedemptionValue_E00A4A36F3E0062F22A3C01124D691AC_label_en-US" xlink:label="lab_us-gaap_MinorityInterestChangeInRedemptionValue_E00A4A36F3E0062F22A3C01124D691AC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Noncontrolling Interest, Change in Redemption Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MinorityInterestChangeInRedemptionValue" xlink:label="loc_us-gaap_MinorityInterestChangeInRedemptionValue_E00A4A36F3E0062F22A3C01124D691AC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MinorityInterestChangeInRedemptionValue_E00A4A36F3E0062F22A3C01124D691AC" xlink:to="lab_us-gaap_MinorityInterestChangeInRedemptionValue_E00A4A36F3E0062F22A3C01124D691AC" xlink:type="arc" />
    <link:label id="lab_mdca_AdjustmentstoAdditionalPaidinCapitalChangesduetoBusinessCombinations_0ECD4AC9A6035A861AA8C01124D6EA1D_negatedLabel_en-US" xlink:label="lab_mdca_AdjustmentstoAdditionalPaidinCapitalChangesduetoBusinessCombinations_0ECD4AC9A6035A861AA8C01124D6EA1D" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Business acquisitions and step-up transactions, net of tax</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_AdjustmentstoAdditionalPaidinCapitalChangesduetoBusinessCombinations" xlink:label="loc_mdca_AdjustmentstoAdditionalPaidinCapitalChangesduetoBusinessCombinations_0ECD4AC9A6035A861AA8C01124D6EA1D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_AdjustmentstoAdditionalPaidinCapitalChangesduetoBusinessCombinations_0ECD4AC9A6035A861AA8C01124D6EA1D" xlink:to="lab_mdca_AdjustmentstoAdditionalPaidinCapitalChangesduetoBusinessCombinations_0ECD4AC9A6035A861AA8C01124D6EA1D" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockholdersEquityOther_0B68F3F7E28ECC94DFBAC01124D7327E_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityOther_0B68F3F7E28ECC94DFBAC01124D7327E" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Other</link:label>
    <link:label id="lab_us-gaap_StockholdersEquityOther_0B68F3F7E28ECC94DFBAC01124D7327E_label_en-US" xlink:label="lab_us-gaap_StockholdersEquityOther_0B68F3F7E28ECC94DFBAC01124D7327E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stockholders' Equity, Other</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquityOther" xlink:label="loc_us-gaap_StockholdersEquityOther_0B68F3F7E28ECC94DFBAC01124D7327E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquityOther_0B68F3F7E28ECC94DFBAC01124D7327E" xlink:to="lab_us-gaap_StockholdersEquityOther_0B68F3F7E28ECC94DFBAC01124D7327E" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_A3D50EE7E37AD896C811C01124D766FC_periodEndLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_A3D50EE7E37AD896C811C01124D766FC" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Balance</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_A3D50EE7E37AD896C811C01124D766FC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_A3D50EE7E37AD896C811C01124D766FC" xlink:to="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_A3D50EE7E37AD896C811C01124D766FC" xlink:type="arc" />
    <link:label id="lab_us-gaap_SharesOutstanding_6FB14233DAC07ABF4F95C01124D7867D_periodEndLabel_en-US" xlink:label="lab_us-gaap_SharesOutstanding_6FB14233DAC07ABF4F95C01124D7867D" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Balance (in shares)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharesOutstanding" xlink:label="loc_us-gaap_SharesOutstanding_6FB14233DAC07ABF4F95C01124D7867D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharesOutstanding_6FB14233DAC07ABF4F95C01124D7867D" xlink:to="lab_us-gaap_SharesOutstanding_6FB14233DAC07ABF4F95C01124D7867D" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommonStockSharesOutstanding_0F442D232FF5E8A67663C01124D7F67E_periodEndLabel_en-US" xlink:label="lab_us-gaap_CommonStockSharesOutstanding_0F442D232FF5E8A67663C01124D7F67E" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Common stock, balance (in shares)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_0F442D232FF5E8A67663C01124D7F67E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockSharesOutstanding_0F442D232FF5E8A67663C01124D7F67E" xlink:to="lab_us-gaap_CommonStockSharesOutstanding_0F442D232FF5E8A67663C01124D7F67E" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementOfCashFlowsAbstract_F1D7DE062E45FC39208FD9A5A8ADED29_label_en-US" xlink:label="lab_us-gaap_StatementOfCashFlowsAbstract_F1D7DE062E45FC39208FD9A5A8ADED29" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement of Cash Flows [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:label="loc_us-gaap_StatementOfCashFlowsAbstract_F1D7DE062E45FC39208FD9A5A8ADED29" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_F1D7DE062E45FC39208FD9A5A8ADED29" xlink:to="lab_us-gaap_StatementOfCashFlowsAbstract_F1D7DE062E45FC39208FD9A5A8ADED29" xlink:type="arc" />
    <link:label id="lab_us-gaap_LineOfCreditFacilityAxis_77E9202C8DC7C230E87DD9A5A8B5F6D6_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityAxis_77E9202C8DC7C230E87DD9A5A8B5F6D6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Lender Name [Axis]</link:label>
    <link:label id="lab_us-gaap_LineOfCreditFacilityAxis_77E9202C8DC7C230E87DD9A5A8B5F6D6_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityAxis_77E9202C8DC7C230E87DD9A5A8B5F6D6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lender Name [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityAxis" xlink:label="loc_us-gaap_LineOfCreditFacilityAxis_77E9202C8DC7C230E87DD9A5A8B5F6D6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityAxis_77E9202C8DC7C230E87DD9A5A8B5F6D6" xlink:to="lab_us-gaap_LineOfCreditFacilityAxis_77E9202C8DC7C230E87DD9A5A8B5F6D6" xlink:type="arc" />
    <link:label id="lab_us-gaap_LineOfCreditFacilityLenderDomain_E6E3F7481E84A3F6A7FED9A5A8B582B3_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityLenderDomain_E6E3F7481E84A3F6A7FED9A5A8B582B3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, Lender [Domain]</link:label>
    <link:label id="lab_us-gaap_LineOfCreditFacilityLenderDomain_E6E3F7481E84A3F6A7FED9A5A8B582B3_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityLenderDomain_E6E3F7481E84A3F6A7FED9A5A8B582B3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, Lender [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityLenderDomain" xlink:label="loc_us-gaap_LineOfCreditFacilityLenderDomain_E6E3F7481E84A3F6A7FED9A5A8B582B3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityLenderDomain_E6E3F7481E84A3F6A7FED9A5A8B582B3" xlink:to="lab_us-gaap_LineOfCreditFacilityLenderDomain_E6E3F7481E84A3F6A7FED9A5A8B582B3" xlink:type="arc" />
    <link:label id="lab_mdca_WellsFargoCapitalFinanceLlcMember_5307D17483D6FDC0B929D9A5A8B5A32C_terseLabel_en-US" xlink:label="lab_mdca_WellsFargoCapitalFinanceLlcMember_5307D17483D6FDC0B929D9A5A8B5A32C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Wells Fargo Capital Finance, LLC</link:label>
    <link:label id="lab_mdca_WellsFargoCapitalFinanceLlcMember_5307D17483D6FDC0B929D9A5A8B5A32C_label_en-US" xlink:label="lab_mdca_WellsFargoCapitalFinanceLlcMember_5307D17483D6FDC0B929D9A5A8B5A32C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Wells Fargo Capital Finance, Llc [Member]</link:label>
    <link:label id="lab_mdca_WellsFargoCapitalFinanceLlcMember_5307D17483D6FDC0B929D9A5A8B5A32C_documentation_en-US" xlink:label="lab_mdca_WellsFargoCapitalFinanceLlcMember_5307D17483D6FDC0B929D9A5A8B5A32C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US" />
    <link:loc xlink:href="mdca-20200630.xsd#mdca_WellsFargoCapitalFinanceLlcMember" xlink:label="loc_mdca_WellsFargoCapitalFinanceLlcMember_5307D17483D6FDC0B929D9A5A8B5A32C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_WellsFargoCapitalFinanceLlcMember_5307D17483D6FDC0B929D9A5A8B5A32C" xlink:to="lab_mdca_WellsFargoCapitalFinanceLlcMember_5307D17483D6FDC0B929D9A5A8B5A32C" xlink:type="arc" />
    <link:label id="lab_us-gaap_RevolvingCreditFacilityMember_3EBC446794891369BBE2D9A5A8B7250D_terseLabel_en-US" xlink:label="lab_us-gaap_RevolvingCreditFacilityMember_3EBC446794891369BBE2D9A5A8B7250D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revolving Credit Facility</link:label>
    <link:label id="lab_us-gaap_RevolvingCreditFacilityMember_3EBC446794891369BBE2D9A5A8B7250D_label_en-US" xlink:label="lab_us-gaap_RevolvingCreditFacilityMember_3EBC446794891369BBE2D9A5A8B7250D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revolving Credit Facility [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevolvingCreditFacilityMember" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_3EBC446794891369BBE2D9A5A8B7250D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevolvingCreditFacilityMember_3EBC446794891369BBE2D9A5A8B7250D" xlink:to="lab_us-gaap_RevolvingCreditFacilityMember_3EBC446794891369BBE2D9A5A8B7250D" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_13A22EBEC0338B278364D9A5A8BD0E43_verboseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_13A22EBEC0338B278364D9A5A8BD0E43" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Cash flows from operating activities:</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_13A22EBEC0338B278364D9A5A8BD0E43_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_13A22EBEC0338B278364D9A5A8BD0E43" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Operating Activities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_13A22EBEC0338B278364D9A5A8BD0E43" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_13A22EBEC0338B278364D9A5A8BD0E43" xlink:to="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_13A22EBEC0338B278364D9A5A8BD0E43" xlink:type="arc" />
    <link:label id="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_01F7CAF1A2B1FF1258B3D9A5A8BE4E00_terseLabel_en-US" xlink:label="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_01F7CAF1A2B1FF1258B3D9A5A8BE4E00" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Adjustments to reconcile net income to cash used in operating activities:</link:label>
    <link:label id="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_01F7CAF1A2B1FF1258B3D9A5A8BE4E00_label_en-US" xlink:label="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_01F7CAF1A2B1FF1258B3D9A5A8BE4E00" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_01F7CAF1A2B1FF1258B3D9A5A8BE4E00" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_01F7CAF1A2B1FF1258B3D9A5A8BE4E00" xlink:to="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_01F7CAF1A2B1FF1258B3D9A5A8BE4E00" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensation_3D15FB170E58A0428BBAD9A5A8C28C0C_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensation_3D15FB170E58A0428BBAD9A5A8C28C0C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock-based compensation</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaap_ShareBasedCompensation_3D15FB170E58A0428BBAD9A5A8C28C0C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensation_3D15FB170E58A0428BBAD9A5A8C28C0C" xlink:to="lab_us-gaap_ShareBasedCompensation_3D15FB170E58A0428BBAD9A5A8C28C0C" xlink:type="arc" />
    <link:label id="lab_us-gaap_Depreciation_75F2FF55BCF04626C735D9A5A8C22C3E_terseLabel_en-US" xlink:label="lab_us-gaap_Depreciation_75F2FF55BCF04626C735D9A5A8C22C3E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Depreciation and amortization</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Depreciation" xlink:label="loc_us-gaap_Depreciation_75F2FF55BCF04626C735D9A5A8C22C3E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Depreciation_75F2FF55BCF04626C735D9A5A8C22C3E" xlink:to="lab_us-gaap_Depreciation_75F2FF55BCF04626C735D9A5A8C22C3E" xlink:type="arc" />
    <link:label id="lab_us-gaap_AssetImpairmentCharges_7236D374C66F21C9708AD9A5A8C2AAC6_terseLabel_en-US" xlink:label="lab_us-gaap_AssetImpairmentCharges_7236D374C66F21C9708AD9A5A8C2AAC6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Impairment and other losses</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetImpairmentCharges" xlink:label="loc_us-gaap_AssetImpairmentCharges_7236D374C66F21C9708AD9A5A8C2AAC6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetImpairmentCharges_7236D374C66F21C9708AD9A5A8C2AAC6" xlink:to="lab_us-gaap_AssetImpairmentCharges_7236D374C66F21C9708AD9A5A8C2AAC6" xlink:type="arc" />
    <link:label id="lab_mdca_AdjustmentToDeferredAcquisitionConsideration_BA89E8D876EE9B2B9AFDD9A5A8C3F1ED_verboseLabel_en-US" xlink:label="lab_mdca_AdjustmentToDeferredAcquisitionConsideration_BA89E8D876EE9B2B9AFDD9A5A8C3F1ED" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Adjustment to deferred acquisition consideration</link:label>
    <link:label id="lab_mdca_AdjustmentToDeferredAcquisitionConsideration_BA89E8D876EE9B2B9AFDD9A5A8C3F1ED_label_en-US" xlink:label="lab_mdca_AdjustmentToDeferredAcquisitionConsideration_BA89E8D876EE9B2B9AFDD9A5A8C3F1ED" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustment To Deferred Acquisition Consideration</link:label>
    <link:label id="lab_mdca_AdjustmentToDeferredAcquisitionConsideration_BA89E8D876EE9B2B9AFDD9A5A8C3F1ED_documentation_en-US" xlink:label="lab_mdca_AdjustmentToDeferredAcquisitionConsideration_BA89E8D876EE9B2B9AFDD9A5A8C3F1ED" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The amount of expense related to the remeasurement of the deferred acquisition consideration.</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_AdjustmentToDeferredAcquisitionConsideration" xlink:label="loc_mdca_AdjustmentToDeferredAcquisitionConsideration_BA89E8D876EE9B2B9AFDD9A5A8C3F1ED" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_AdjustmentToDeferredAcquisitionConsideration_BA89E8D876EE9B2B9AFDD9A5A8C3F1ED" xlink:to="lab_mdca_AdjustmentToDeferredAcquisitionConsideration_BA89E8D876EE9B2B9AFDD9A5A8C3F1ED" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredIncomeTaxExpenseBenefit_62C296A55FEAC5EC19DCD9A5A8C4BE31_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxExpenseBenefit_62C296A55FEAC5EC19DCD9A5A8C4BE31" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred income taxes</link:label>
    <link:label id="lab_us-gaap_DeferredIncomeTaxExpenseBenefit_62C296A55FEAC5EC19DCD9A5A8C4BE31_label_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxExpenseBenefit_62C296A55FEAC5EC19DCD9A5A8C4BE31" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Income Tax Expense (Benefit)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_62C296A55FEAC5EC19DCD9A5A8C4BE31" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_62C296A55FEAC5EC19DCD9A5A8C4BE31" xlink:to="lab_us-gaap_DeferredIncomeTaxExpenseBenefit_62C296A55FEAC5EC19DCD9A5A8C4BE31" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet_BE5FF6F8BFCE6C7A34CED9A5A8C442EA_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet_BE5FF6F8BFCE6C7A34CED9A5A8C442EA" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Foreign exchange and other</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet_BE5FF6F8BFCE6C7A34CED9A5A8C442EA_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet_BE5FF6F8BFCE6C7A34CED9A5A8C442EA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Other Noncurrent Assets and Liabilities, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet_BE5FF6F8BFCE6C7A34CED9A5A8C442EA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet_BE5FF6F8BFCE6C7A34CED9A5A8C442EA" xlink:to="lab_us-gaap_IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet_BE5FF6F8BFCE6C7A34CED9A5A8C442EA" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_A52220D198E29E39555AD9A5A8C4B51A_verboseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_A52220D198E29E39555AD9A5A8C4B51A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Changes in working capital:</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_A52220D198E29E39555AD9A5A8C4B51A_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_A52220D198E29E39555AD9A5A8C4B51A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Operating Capital [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_A52220D198E29E39555AD9A5A8C4B51A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_A52220D198E29E39555AD9A5A8C4B51A" xlink:to="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_A52220D198E29E39555AD9A5A8C4B51A" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_A61968804A8A3668108BD9A5A8C4E3EF_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_A61968804A8A3668108BD9A5A8C4E3EF" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Accounts receivable</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_A61968804A8A3668108BD9A5A8C4E3EF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_A61968804A8A3668108BD9A5A8C4E3EF" xlink:to="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_A61968804A8A3668108BD9A5A8C4E3EF" xlink:type="arc" />
    <link:label id="lab_mdca_IncreaseDecreaseInExpendituresBillableToClients_22838A4B0FAC811F5C7BD9A5A8C486FB_negatedTerseLabel_en-US" xlink:label="lab_mdca_IncreaseDecreaseInExpendituresBillableToClients_22838A4B0FAC811F5C7BD9A5A8C486FB" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Expenditures billable to clients</link:label>
    <link:label id="lab_mdca_IncreaseDecreaseInExpendituresBillableToClients_22838A4B0FAC811F5C7BD9A5A8C486FB_label_en-US" xlink:label="lab_mdca_IncreaseDecreaseInExpendituresBillableToClients_22838A4B0FAC811F5C7BD9A5A8C486FB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase Decrease In Expenditures Billable To Clients</link:label>
    <link:label id="lab_mdca_IncreaseDecreaseInExpendituresBillableToClients_22838A4B0FAC811F5C7BD9A5A8C486FB_documentation_en-US" xlink:label="lab_mdca_IncreaseDecreaseInExpendituresBillableToClients_22838A4B0FAC811F5C7BD9A5A8C486FB" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The increase (decrease) during the reporting period in expenditures billable to clients.</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_IncreaseDecreaseInExpendituresBillableToClients" xlink:label="loc_mdca_IncreaseDecreaseInExpendituresBillableToClients_22838A4B0FAC811F5C7BD9A5A8C486FB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_IncreaseDecreaseInExpendituresBillableToClients_22838A4B0FAC811F5C7BD9A5A8C486FB" xlink:to="lab_mdca_IncreaseDecreaseInExpendituresBillableToClients_22838A4B0FAC811F5C7BD9A5A8C486FB" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_F8981931A16D3B05E450D9A5A8C403C1_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_F8981931A16D3B05E450D9A5A8C403C1" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Prepaid expenses and other current assets</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_F8981931A16D3B05E450D9A5A8C403C1_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_F8981931A16D3B05E450D9A5A8C403C1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Prepaid Expense and Other Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_F8981931A16D3B05E450D9A5A8C403C1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_F8981931A16D3B05E450D9A5A8C403C1" xlink:to="lab_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_F8981931A16D3B05E450D9A5A8C403C1" xlink:type="arc" />
    <link:label id="lab_mdca_IncreaseDecreaseInAccountsPayableAccruedExpensesAndOtherLiabilities_AD8108CEDF2AF562BAE6D9A5A8C6669C_terseLabel_en-US" xlink:label="lab_mdca_IncreaseDecreaseInAccountsPayableAccruedExpensesAndOtherLiabilities_AD8108CEDF2AF562BAE6D9A5A8C6669C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accounts payable, accruals and other current liabilities</link:label>
    <link:label id="lab_mdca_IncreaseDecreaseInAccountsPayableAccruedExpensesAndOtherLiabilities_AD8108CEDF2AF562BAE6D9A5A8C6669C_label_en-US" xlink:label="lab_mdca_IncreaseDecreaseInAccountsPayableAccruedExpensesAndOtherLiabilities_AD8108CEDF2AF562BAE6D9A5A8C6669C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase Decrease In Accounts Payable Accrued Expenses and Other Liabilities</link:label>
    <link:label id="lab_mdca_IncreaseDecreaseInAccountsPayableAccruedExpensesAndOtherLiabilities_AD8108CEDF2AF562BAE6D9A5A8C6669C_documentation_en-US" xlink:label="lab_mdca_IncreaseDecreaseInAccountsPayableAccruedExpensesAndOtherLiabilities_AD8108CEDF2AF562BAE6D9A5A8C6669C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The net change during the reporting period in the aggregate amount of accounts payable accrued expenses and other liabilities incurred but not paid.</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_IncreaseDecreaseInAccountsPayableAccruedExpensesAndOtherLiabilities" xlink:label="loc_mdca_IncreaseDecreaseInAccountsPayableAccruedExpensesAndOtherLiabilities_AD8108CEDF2AF562BAE6D9A5A8C6669C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_IncreaseDecreaseInAccountsPayableAccruedExpensesAndOtherLiabilities_AD8108CEDF2AF562BAE6D9A5A8C6669C" xlink:to="lab_mdca_IncreaseDecreaseInAccountsPayableAccruedExpensesAndOtherLiabilities_AD8108CEDF2AF562BAE6D9A5A8C6669C" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentForContingentConsiderationLiabilityOperatingActivities_8CD0576F60D054722779D9A5A8C6E6EE_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentForContingentConsiderationLiabilityOperatingActivities_8CD0576F60D054722779D9A5A8C6E6EE" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Acquisition related payments</link:label>
    <link:label id="lab_us-gaap_PaymentForContingentConsiderationLiabilityOperatingActivities_8CD0576F60D054722779D9A5A8C6E6EE_label_en-US" xlink:label="lab_us-gaap_PaymentForContingentConsiderationLiabilityOperatingActivities_8CD0576F60D054722779D9A5A8C6E6EE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payment for Contingent Consideration Liability, Operating Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentForContingentConsiderationLiabilityOperatingActivities" xlink:label="loc_us-gaap_PaymentForContingentConsiderationLiabilityOperatingActivities_8CD0576F60D054722779D9A5A8C6E6EE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentForContingentConsiderationLiabilityOperatingActivities_8CD0576F60D054722779D9A5A8C6E6EE" xlink:to="lab_us-gaap_PaymentForContingentConsiderationLiabilityOperatingActivities_8CD0576F60D054722779D9A5A8C6E6EE" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInDeferredRevenue_138E6C0D5E2CA2E715DBD9A5A8C63D85_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInDeferredRevenue_138E6C0D5E2CA2E715DBD9A5A8C63D85" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Advance billings</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInDeferredRevenue_138E6C0D5E2CA2E715DBD9A5A8C63D85_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInDeferredRevenue_138E6C0D5E2CA2E715DBD9A5A8C63D85" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Deferred Revenue</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInDeferredRevenue" xlink:label="loc_us-gaap_IncreaseDecreaseInDeferredRevenue_138E6C0D5E2CA2E715DBD9A5A8C63D85" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInDeferredRevenue_138E6C0D5E2CA2E715DBD9A5A8C63D85" xlink:to="lab_us-gaap_IncreaseDecreaseInDeferredRevenue_138E6C0D5E2CA2E715DBD9A5A8C63D85" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_F823BE7D542E61063B1DD9A5A8C6933A_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_F823BE7D542E61063B1DD9A5A8C6933A" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash used in operating activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_F823BE7D542E61063B1DD9A5A8C6933A_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_F823BE7D542E61063B1DD9A5A8C6933A" 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/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_F823BE7D542E61063B1DD9A5A8C6933A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_F823BE7D542E61063B1DD9A5A8C6933A" xlink:to="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_F823BE7D542E61063B1DD9A5A8C6933A" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_2E377276CDA7F4476FD3D9A5A8C656BE_verboseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_2E377276CDA7F4476FD3D9A5A8C656BE" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Cash flows from investing activities:</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_2E377276CDA7F4476FD3D9A5A8C656BE_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_2E377276CDA7F4476FD3D9A5A8C656BE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Investing Activities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_2E377276CDA7F4476FD3D9A5A8C656BE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_2E377276CDA7F4476FD3D9A5A8C656BE" xlink:to="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_2E377276CDA7F4476FD3D9A5A8C656BE" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_9313DEF958190C035613D9A5A8C64816_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_9313DEF958190C035613D9A5A8C64816" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Capital expenditures</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_9313DEF958190C035613D9A5A8C64816" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_9313DEF958190C035613D9A5A8C64816" xlink:to="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_9313DEF958190C035613D9A5A8C64816" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromSaleOfProductiveAssets_EE7986D79571E796D1EFD9A5A8C72CF1_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfProductiveAssets_EE7986D79571E796D1EFD9A5A8C72CF1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from sale of assets</link:label>
    <link:label id="lab_us-gaap_ProceedsFromSaleOfProductiveAssets_EE7986D79571E796D1EFD9A5A8C72CF1_label_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfProductiveAssets_EE7986D79571E796D1EFD9A5A8C72CF1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Sale of Productive Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromSaleOfProductiveAssets" xlink:label="loc_us-gaap_ProceedsFromSaleOfProductiveAssets_EE7986D79571E796D1EFD9A5A8C72CF1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromSaleOfProductiveAssets_EE7986D79571E796D1EFD9A5A8C72CF1" xlink:to="lab_us-gaap_ProceedsFromSaleOfProductiveAssets_EE7986D79571E796D1EFD9A5A8C72CF1" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_3356D6B83A45C4D2A57DD9A5A8C79C28_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_3356D6B83A45C4D2A57DD9A5A8C79C28" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Acquisitions, net of cash acquired</link:label>
    <link:label id="lab_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_3356D6B83A45C4D2A57DD9A5A8C79C28_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_3356D6B83A45C4D2A57DD9A5A8C79C28" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments to Acquire Businesses, Net of Cash Acquired</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_3356D6B83A45C4D2A57DD9A5A8C79C28" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_3356D6B83A45C4D2A57DD9A5A8C79C28" xlink:to="lab_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_3356D6B83A45C4D2A57DD9A5A8C79C28" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_1DDFBAFAC2E584F670B4D9A5A8C72C17_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_1DDFBAFAC2E584F670B4D9A5A8C72C17" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Other investments</link:label>
    <link:label id="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_1DDFBAFAC2E584F670B4D9A5A8C72C17_label_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_1DDFBAFAC2E584F670B4D9A5A8C72C17" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments for (Proceeds from) Other Investing Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities" xlink:label="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_1DDFBAFAC2E584F670B4D9A5A8C72C17" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_1DDFBAFAC2E584F670B4D9A5A8C72C17" xlink:to="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_1DDFBAFAC2E584F670B4D9A5A8C72C17" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_AB650AEDA71B068312F0D9A5A8C7355E_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_AB650AEDA71B068312F0D9A5A8C7355E" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash provided by investing activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_AB650AEDA71B068312F0D9A5A8C7355E_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_AB650AEDA71B068312F0D9A5A8C7355E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Investing Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_AB650AEDA71B068312F0D9A5A8C7355E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_AB650AEDA71B068312F0D9A5A8C7355E" xlink:to="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_AB650AEDA71B068312F0D9A5A8C7355E" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_0135CE3B5BDEBAAEE018D9A5A8C8D801_verboseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_0135CE3B5BDEBAAEE018D9A5A8C8D801" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Cash flows from financing activities:</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_0135CE3B5BDEBAAEE018D9A5A8C8D801_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_0135CE3B5BDEBAAEE018D9A5A8C8D801" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Financing Activities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_0135CE3B5BDEBAAEE018D9A5A8C8D801" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_0135CE3B5BDEBAAEE018D9A5A8C8D801" xlink:to="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_0135CE3B5BDEBAAEE018D9A5A8C8D801" xlink:type="arc" />
    <link:label id="lab_us-gaap_RepaymentsOfLinesOfCredit_E63672C95E6CFDCB8B62D9A5A8C8D342_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_RepaymentsOfLinesOfCredit_E63672C95E6CFDCB8B62D9A5A8C8D342" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Repayments of borrowings under revolving credit facility</link:label>
    <link:label id="lab_us-gaap_RepaymentsOfLinesOfCredit_E63672C95E6CFDCB8B62D9A5A8C8D342_label_en-US" xlink:label="lab_us-gaap_RepaymentsOfLinesOfCredit_E63672C95E6CFDCB8B62D9A5A8C8D342" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Repayments of Lines of Credit</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RepaymentsOfLinesOfCredit" xlink:label="loc_us-gaap_RepaymentsOfLinesOfCredit_E63672C95E6CFDCB8B62D9A5A8C8D342" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RepaymentsOfLinesOfCredit_E63672C95E6CFDCB8B62D9A5A8C8D342" xlink:to="lab_us-gaap_RepaymentsOfLinesOfCredit_E63672C95E6CFDCB8B62D9A5A8C8D342" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromLinesOfCredit_4960DA7E200C03D32FBAD9A5A8C86F55_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromLinesOfCredit_4960DA7E200C03D32FBAD9A5A8C86F55" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from borrowings under revolving credit facility</link:label>
    <link:label id="lab_us-gaap_ProceedsFromLinesOfCredit_4960DA7E200C03D32FBAD9A5A8C86F55_label_en-US" xlink:label="lab_us-gaap_ProceedsFromLinesOfCredit_4960DA7E200C03D32FBAD9A5A8C86F55" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Lines of Credit</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromLinesOfCredit" xlink:label="loc_us-gaap_ProceedsFromLinesOfCredit_4960DA7E200C03D32FBAD9A5A8C86F55" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromLinesOfCredit_4960DA7E200C03D32FBAD9A5A8C86F55" xlink:to="lab_us-gaap_ProceedsFromLinesOfCredit_4960DA7E200C03D32FBAD9A5A8C86F55" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentForContingentConsiderationLiabilityFinancingActivities_D266341A0970B8F41BF8D9A5A8C9B4B6_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentForContingentConsiderationLiabilityFinancingActivities_D266341A0970B8F41BF8D9A5A8C9B4B6" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Acquisition related payments</link:label>
    <link:label id="lab_us-gaap_PaymentForContingentConsiderationLiabilityFinancingActivities_D266341A0970B8F41BF8D9A5A8C9B4B6_label_en-US" xlink:label="lab_us-gaap_PaymentForContingentConsiderationLiabilityFinancingActivities_D266341A0970B8F41BF8D9A5A8C9B4B6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payment for Contingent Consideration Liability, Financing Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentForContingentConsiderationLiabilityFinancingActivities" xlink:label="loc_us-gaap_PaymentForContingentConsiderationLiabilityFinancingActivities_D266341A0970B8F41BF8D9A5A8C9B4B6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentForContingentConsiderationLiabilityFinancingActivities_D266341A0970B8F41BF8D9A5A8C9B4B6" xlink:to="lab_us-gaap_PaymentForContingentConsiderationLiabilityFinancingActivities_D266341A0970B8F41BF8D9A5A8C9B4B6" xlink:type="arc" />
    <link:label id="lab_us-gaap_RepaymentsOfLongTermDebt_EDE1056445A6F3511A3DD9A5A8C9B9B9_negatedLabel_en-US" xlink:label="lab_us-gaap_RepaymentsOfLongTermDebt_EDE1056445A6F3511A3DD9A5A8C9B9B9" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Other</link:label>
    <link:label id="lab_us-gaap_RepaymentsOfLongTermDebt_EDE1056445A6F3511A3DD9A5A8C9B9B9_label_en-US" xlink:label="lab_us-gaap_RepaymentsOfLongTermDebt_EDE1056445A6F3511A3DD9A5A8C9B9B9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Repayments of Long-term Debt</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RepaymentsOfLongTermDebt" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt_EDE1056445A6F3511A3DD9A5A8C9B9B9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RepaymentsOfLongTermDebt_EDE1056445A6F3511A3DD9A5A8C9B9B9" xlink:to="lab_us-gaap_RepaymentsOfLongTermDebt_EDE1056445A6F3511A3DD9A5A8C9B9B9" xlink:type="arc" />
    <link:label id="lab_mdca_PaymentsforRepurchaseofSeniorNotes_33B5C39D3687200056E9D9A5A8C9AEA8_negatedTerseLabel_en-US" xlink:label="lab_mdca_PaymentsforRepurchaseofSeniorNotes_33B5C39D3687200056E9D9A5A8C9AEA8" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Repurchase of Senior Notes</link:label>
    <link:label id="lab_mdca_PaymentsforRepurchaseofSeniorNotes_33B5C39D3687200056E9D9A5A8C9AEA8_label_en-US" xlink:label="lab_mdca_PaymentsforRepurchaseofSeniorNotes_33B5C39D3687200056E9D9A5A8C9AEA8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments for Repurchase of Senior Notes</link:label>
    <link:label id="lab_mdca_PaymentsforRepurchaseofSeniorNotes_33B5C39D3687200056E9D9A5A8C9AEA8_documentation_en-US" xlink:label="lab_mdca_PaymentsforRepurchaseofSeniorNotes_33B5C39D3687200056E9D9A5A8C9AEA8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Payments for Repurchase of Senior Notes</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_PaymentsforRepurchaseofSeniorNotes" xlink:label="loc_mdca_PaymentsforRepurchaseofSeniorNotes_33B5C39D3687200056E9D9A5A8C9AEA8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_PaymentsforRepurchaseofSeniorNotes_33B5C39D3687200056E9D9A5A8C9AEA8" xlink:to="lab_mdca_PaymentsforRepurchaseofSeniorNotes_33B5C39D3687200056E9D9A5A8C9AEA8" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_94A5AD982DE563D0CA8CD9A5A8CBA186_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_94A5AD982DE563D0CA8CD9A5A8CBA186" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash provided by (used in) financing activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_94A5AD982DE563D0CA8CD9A5A8CBA186_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_94A5AD982DE563D0CA8CD9A5A8CBA186" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Financing Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_94A5AD982DE563D0CA8CD9A5A8CBA186" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_94A5AD982DE563D0CA8CD9A5A8CBA186" xlink:to="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_94A5AD982DE563D0CA8CD9A5A8CBA186" xlink:type="arc" />
    <link:label id="lab_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_4572E3338C3A6C403E79D9A5A8CB5334_verboseLabel_en-US" xlink:label="lab_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_4572E3338C3A6C403E79D9A5A8CB5334" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Effect of exchange rate changes on cash, cash equivalents, and cash held in trusts</link:label>
    <link:label id="lab_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_4572E3338C3A6C403E79D9A5A8CB5334_label_en-US" xlink:label="lab_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_4572E3338C3A6C403E79D9A5A8CB5334" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_4572E3338C3A6C403E79D9A5A8CB5334" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_4572E3338C3A6C403E79D9A5A8CB5334" xlink:to="lab_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_4572E3338C3A6C403E79D9A5A8CB5334" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_31B94B204F0E1EEC0E08D9A5A8CBF949_totalLabel_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_31B94B204F0E1EEC0E08D9A5A8CBF949" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net decrease in cash and cash equivalents, including cash classified within current assets held for sale</link:label>
    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_31B94B204F0E1EEC0E08D9A5A8CBF949_label_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_31B94B204F0E1EEC0E08D9A5A8CBF949" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_31B94B204F0E1EEC0E08D9A5A8CBF949" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_31B94B204F0E1EEC0E08D9A5A8CBF949" xlink:to="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_31B94B204F0E1EEC0E08D9A5A8CBF949" xlink:type="arc" />
    <link:label id="lab_mdca_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsFromTrustsIncreaseDecreaseFromCashClassifiedAsAssetsHeldForSale_B4EC4047C95D76033D5ED9A5A8CB2AD4_terseLabel_en-US" xlink:label="lab_mdca_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsFromTrustsIncreaseDecreaseFromCashClassifiedAsAssetsHeldForSale_B4EC4047C95D76033D5ED9A5A8CB2AD4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Change in cash and cash equivalents held in trusts classified within held for sale</link:label>
    <link:label id="lab_mdca_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsFromTrustsIncreaseDecreaseFromCashClassifiedAsAssetsHeldForSale_B4EC4047C95D76033D5ED9A5A8CB2AD4_label_en-US" xlink:label="lab_mdca_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsFromTrustsIncreaseDecreaseFromCashClassifiedAsAssetsHeldForSale_B4EC4047C95D76033D5ED9A5A8CB2AD4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash, Cash Equivalents, Restricted Cash And Restricted Cash Equivalents From Trusts, Increase Decrease From Cash Classified As Assets Held For Sale</link:label>
    <link:label id="lab_mdca_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsFromTrustsIncreaseDecreaseFromCashClassifiedAsAssetsHeldForSale_B4EC4047C95D76033D5ED9A5A8CB2AD4_documentation_en-US" xlink:label="lab_mdca_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsFromTrustsIncreaseDecreaseFromCashClassifiedAsAssetsHeldForSale_B4EC4047C95D76033D5ED9A5A8CB2AD4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Cash, Cash Equivalents, Restricted Cash And Restricted Cash Equivalents From Trusts, Increase Decrease From Cash Classified As Assets Held For Sale</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsFromTrustsIncreaseDecreaseFromCashClassifiedAsAssetsHeldForSale" xlink:label="loc_mdca_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsFromTrustsIncreaseDecreaseFromCashClassifiedAsAssetsHeldForSale_B4EC4047C95D76033D5ED9A5A8CB2AD4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsFromTrustsIncreaseDecreaseFromCashClassifiedAsAssetsHeldForSale_B4EC4047C95D76033D5ED9A5A8CB2AD4" xlink:to="lab_mdca_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsFromTrustsIncreaseDecreaseFromCashClassifiedAsAssetsHeldForSale_B4EC4047C95D76033D5ED9A5A8CB2AD4" xlink:type="arc" />
    <link:label id="lab_mdca_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsDecreaseFromCashClassifiedAsAssetsHeldForSale_63828B930BDC12D1389CD9A5A8CB0EF0_terseLabel_en-US" xlink:label="lab_mdca_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsDecreaseFromCashClassifiedAsAssetsHeldForSale_63828B930BDC12D1389CD9A5A8CB0EF0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Change in cash and cash equivalents classified within assets held for sale</link:label>
    <link:label id="lab_mdca_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsDecreaseFromCashClassifiedAsAssetsHeldForSale_63828B930BDC12D1389CD9A5A8CB0EF0_label_en-US" xlink:label="lab_mdca_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsDecreaseFromCashClassifiedAsAssetsHeldForSale_63828B930BDC12D1389CD9A5A8CB0EF0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash, Cash Equivalents, Restricted Cash And Restricted Cash Equivalents, Decrease From Cash Classified As Assets Held For Sale</link:label>
    <link:label id="lab_mdca_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsDecreaseFromCashClassifiedAsAssetsHeldForSale_63828B930BDC12D1389CD9A5A8CB0EF0_documentation_en-US" xlink:label="lab_mdca_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsDecreaseFromCashClassifiedAsAssetsHeldForSale_63828B930BDC12D1389CD9A5A8CB0EF0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Cash, Cash Equivalents, Restricted Cash And Restricted Cash Equivalents, Decrease From Cash Classified As Assets Held For Sale</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsDecreaseFromCashClassifiedAsAssetsHeldForSale" xlink:label="loc_mdca_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsDecreaseFromCashClassifiedAsAssetsHeldForSale_63828B930BDC12D1389CD9A5A8CB0EF0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsDecreaseFromCashClassifiedAsAssetsHeldForSale_63828B930BDC12D1389CD9A5A8CB0EF0" xlink:to="lab_mdca_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsDecreaseFromCashClassifiedAsAssetsHeldForSale_63828B930BDC12D1389CD9A5A8CB0EF0" xlink:type="arc" />
    <link:label id="lab_mdca_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRageEffectNetOfCashClassifiedWithinAssetsHeldForSale_D2A5809DD82195480D6DD9A5A8CB4F59_totalLabel_en-US" xlink:label="lab_mdca_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRageEffectNetOfCashClassifiedWithinAssetsHeldForSale_D2A5809DD82195480D6DD9A5A8CB4F59" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net decrease in cash and cash equivalents</link:label>
    <link:label id="lab_mdca_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRageEffectNetOfCashClassifiedWithinAssetsHeldForSale_D2A5809DD82195480D6DD9A5A8CB4F59_label_en-US" xlink:label="lab_mdca_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRageEffectNetOfCashClassifiedWithinAssetsHeldForSale_D2A5809DD82195480D6DD9A5A8CB4F59" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash, Cash Equivalents, Restricted Cash And Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rage Effect, Net Of Cash Classified Within Assets Held For Sale</link:label>
    <link:label id="lab_mdca_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRageEffectNetOfCashClassifiedWithinAssetsHeldForSale_D2A5809DD82195480D6DD9A5A8CB4F59_documentation_en-US" xlink:label="lab_mdca_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRageEffectNetOfCashClassifiedWithinAssetsHeldForSale_D2A5809DD82195480D6DD9A5A8CB4F59" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Cash, Cash Equivalents, Restricted Cash And Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rage Effect, Net Of Cash Classified Within Assets Held For Sale</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRageEffectNetOfCashClassifiedWithinAssetsHeldForSale" xlink:label="loc_mdca_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRageEffectNetOfCashClassifiedWithinAssetsHeldForSale_D2A5809DD82195480D6DD9A5A8CB4F59" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRageEffectNetOfCashClassifiedWithinAssetsHeldForSale_D2A5809DD82195480D6DD9A5A8CB4F59" xlink:to="lab_mdca_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRageEffectNetOfCashClassifiedWithinAssetsHeldForSale_D2A5809DD82195480D6DD9A5A8CB4F59" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_DB808ED78219CA0A3CBAD9A5A8CB9BB4_periodStartLabel_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_DB808ED78219CA0A3CBAD9A5A8CB9BB4" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Cash and cash equivalents at beginning of period</link:label>
    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_DB808ED78219CA0A3CBAD9A5A8CB9BB4_label_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_DB808ED78219CA0A3CBAD9A5A8CB9BB4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_DB808ED78219CA0A3CBAD9A5A8CB9BB4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_DB808ED78219CA0A3CBAD9A5A8CB9BB4" xlink:to="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_DB808ED78219CA0A3CBAD9A5A8CB9BB4" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_F53F102F4FAC9DD0A8E4D9A5A8CCF44F_periodEndLabel_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_F53F102F4FAC9DD0A8E4D9A5A8CCF44F" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Cash and cash equivalents at end of period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_F53F102F4FAC9DD0A8E4D9A5A8CCF44F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_F53F102F4FAC9DD0A8E4D9A5A8CCF44F" xlink:to="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_F53F102F4FAC9DD0A8E4D9A5A8CCF44F" xlink:type="arc" />
    <link:label id="lab_us-gaap_SupplementalCashFlowInformationAbstract_4998E8130B7087748FA4D9A5A8CC356A_verboseLabel_en-US" xlink:label="lab_us-gaap_SupplementalCashFlowInformationAbstract_4998E8130B7087748FA4D9A5A8CC356A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Supplemental disclosures:</link:label>
    <link:label id="lab_us-gaap_SupplementalCashFlowInformationAbstract_4998E8130B7087748FA4D9A5A8CC356A_label_en-US" xlink:label="lab_us-gaap_SupplementalCashFlowInformationAbstract_4998E8130B7087748FA4D9A5A8CC356A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Supplemental Cash Flow Information [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SupplementalCashFlowInformationAbstract" xlink:label="loc_us-gaap_SupplementalCashFlowInformationAbstract_4998E8130B7087748FA4D9A5A8CC356A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SupplementalCashFlowInformationAbstract_4998E8130B7087748FA4D9A5A8CC356A" xlink:to="lab_us-gaap_SupplementalCashFlowInformationAbstract_4998E8130B7087748FA4D9A5A8CC356A" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxesPaid_CEE07EE78C73EBAA167ED9A5A8CCE9DC_verboseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxesPaid_CEE07EE78C73EBAA167ED9A5A8CCE9DC" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Cash income taxes paid</link:label>
    <link:label id="lab_us-gaap_IncomeTaxesPaid_CEE07EE78C73EBAA167ED9A5A8CCE9DC_label_en-US" xlink:label="lab_us-gaap_IncomeTaxesPaid_CEE07EE78C73EBAA167ED9A5A8CCE9DC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Taxes Paid</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxesPaid" xlink:label="loc_us-gaap_IncomeTaxesPaid_CEE07EE78C73EBAA167ED9A5A8CCE9DC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxesPaid_CEE07EE78C73EBAA167ED9A5A8CCE9DC" xlink:to="lab_us-gaap_IncomeTaxesPaid_CEE07EE78C73EBAA167ED9A5A8CCE9DC" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestPaidNet_B9CCE13B64B57EE12A37D9A5A8CD066C_verboseLabel_en-US" xlink:label="lab_us-gaap_InterestPaidNet_B9CCE13B64B57EE12A37D9A5A8CD066C" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Cash interest paid</link:label>
    <link:label id="lab_us-gaap_InterestPaidNet_B9CCE13B64B57EE12A37D9A5A8CD066C_label_en-US" xlink:label="lab_us-gaap_InterestPaidNet_B9CCE13B64B57EE12A37D9A5A8CD066C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Paid, Excluding Capitalized Interest, Operating Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestPaidNet" xlink:label="loc_us-gaap_InterestPaidNet_B9CCE13B64B57EE12A37D9A5A8CD066C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestPaidNet_B9CCE13B64B57EE12A37D9A5A8CD066C" xlink:to="lab_us-gaap_InterestPaidNet_B9CCE13B64B57EE12A37D9A5A8CD066C" xlink:type="arc" />
    <link:label id="lab_us-gaap_RevenueFromContractWithCustomerAbstract_81DA65F2404B566B817EC011245C53E3_label_en-US" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerAbstract_81DA65F2404B566B817EC011245C53E3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenue from Contract with Customer [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerAbstract" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerAbstract_81DA65F2404B566B817EC011245C53E3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevenueFromContractWithCustomerAbstract_81DA65F2404B566B817EC011245C53E3" xlink:to="lab_us-gaap_RevenueFromContractWithCustomerAbstract_81DA65F2404B566B817EC011245C53E3" xlink:type="arc" />
    <link:label id="lab_us-gaap_DisaggregationOfRevenueTable_C073534A92545C160423C011245C2842_terseLabel_en-US" xlink:label="lab_us-gaap_DisaggregationOfRevenueTable_C073534A92545C160423C011245C2842" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Disaggregation of Revenue [Table]</link:label>
    <link:label id="lab_us-gaap_DisaggregationOfRevenueTable_C073534A92545C160423C011245C2842_label_en-US" xlink:label="lab_us-gaap_DisaggregationOfRevenueTable_C073534A92545C160423C011245C2842" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disaggregation of Revenue [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisaggregationOfRevenueTable" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_C073534A92545C160423C011245C2842" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_C073534A92545C160423C011245C2842" xlink:to="lab_us-gaap_DisaggregationOfRevenueTable_C073534A92545C160423C011245C2842" xlink:type="arc" />
    <link:label id="lab_srt_ProductOrServiceAxis_7F95E652674B3C8B9BE4C011245D8E23_terseLabel_en-US" xlink:label="lab_srt_ProductOrServiceAxis_7F95E652674B3C8B9BE4C011245D8E23" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Product and Service [Axis]</link:label>
    <link:label id="lab_srt_ProductOrServiceAxis_7F95E652674B3C8B9BE4C011245D8E23_label_en-US" xlink:label="lab_srt_ProductOrServiceAxis_7F95E652674B3C8B9BE4C011245D8E23" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Product and Service [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ProductOrServiceAxis" xlink:label="loc_srt_ProductOrServiceAxis_7F95E652674B3C8B9BE4C011245D8E23" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ProductOrServiceAxis_7F95E652674B3C8B9BE4C011245D8E23" xlink:to="lab_srt_ProductOrServiceAxis_7F95E652674B3C8B9BE4C011245D8E23" xlink:type="arc" />
    <link:label id="lab_srt_ProductsAndServicesDomain_9750F72F4A822FC474E5C011245DB194_terseLabel_en-US" xlink:label="lab_srt_ProductsAndServicesDomain_9750F72F4A822FC474E5C011245DB194" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Product and Service [Domain]</link:label>
    <link:label id="lab_srt_ProductsAndServicesDomain_9750F72F4A822FC474E5C011245DB194_label_en-US" xlink:label="lab_srt_ProductsAndServicesDomain_9750F72F4A822FC474E5C011245DB194" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Product and Service [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ProductsAndServicesDomain" xlink:label="loc_srt_ProductsAndServicesDomain_9750F72F4A822FC474E5C011245DB194" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ProductsAndServicesDomain_9750F72F4A822FC474E5C011245DB194" xlink:to="lab_srt_ProductsAndServicesDomain_9750F72F4A822FC474E5C011245DB194" xlink:type="arc" />
    <link:label id="lab_mdca_FoodBeverageMember_78588CE23A7756D3166AC011245D1423_terseLabel_en-US" xlink:label="lab_mdca_FoodBeverageMember_78588CE23A7756D3166AC011245D1423" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Food &amp; Beverage</link:label>
    <link:label id="lab_mdca_FoodBeverageMember_78588CE23A7756D3166AC011245D1423_label_en-US" xlink:label="lab_mdca_FoodBeverageMember_78588CE23A7756D3166AC011245D1423" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Food &amp; Beverage [Member]</link:label>
    <link:label id="lab_mdca_FoodBeverageMember_78588CE23A7756D3166AC011245D1423_documentation_en-US" xlink:label="lab_mdca_FoodBeverageMember_78588CE23A7756D3166AC011245D1423" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Food &amp; Beverage [Member]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_FoodBeverageMember" xlink:label="loc_mdca_FoodBeverageMember_78588CE23A7756D3166AC011245D1423" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_FoodBeverageMember_78588CE23A7756D3166AC011245D1423" xlink:to="lab_mdca_FoodBeverageMember_78588CE23A7756D3166AC011245D1423" xlink:type="arc" />
    <link:label id="lab_us-gaap_RetailMember_AE8592D4FD273D365619C011245E25E8_terseLabel_en-US" xlink:label="lab_us-gaap_RetailMember_AE8592D4FD273D365619C011245E25E8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Retail</link:label>
    <link:label id="lab_us-gaap_RetailMember_AE8592D4FD273D365619C011245E25E8_label_en-US" xlink:label="lab_us-gaap_RetailMember_AE8592D4FD273D365619C011245E25E8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Retail [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetailMember" xlink:label="loc_us-gaap_RetailMember_AE8592D4FD273D365619C011245E25E8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RetailMember_AE8592D4FD273D365619C011245E25E8" xlink:to="lab_us-gaap_RetailMember_AE8592D4FD273D365619C011245E25E8" xlink:type="arc" />
    <link:label id="lab_mdca_ConsumerProductsMember_C2073F4FC41D28737CAEC011245EBBFE_terseLabel_en-US" xlink:label="lab_mdca_ConsumerProductsMember_C2073F4FC41D28737CAEC011245EBBFE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Consumer Products</link:label>
    <link:label id="lab_mdca_ConsumerProductsMember_C2073F4FC41D28737CAEC011245EBBFE_label_en-US" xlink:label="lab_mdca_ConsumerProductsMember_C2073F4FC41D28737CAEC011245EBBFE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Consumer Products [Member]</link:label>
    <link:label id="lab_mdca_ConsumerProductsMember_C2073F4FC41D28737CAEC011245EBBFE_documentation_en-US" xlink:label="lab_mdca_ConsumerProductsMember_C2073F4FC41D28737CAEC011245EBBFE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Consumer Products [Member]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_ConsumerProductsMember" xlink:label="loc_mdca_ConsumerProductsMember_C2073F4FC41D28737CAEC011245EBBFE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_ConsumerProductsMember_C2073F4FC41D28737CAEC011245EBBFE" xlink:to="lab_mdca_ConsumerProductsMember_C2073F4FC41D28737CAEC011245EBBFE" xlink:type="arc" />
    <link:label id="lab_mdca_CommunicationsMember_DB21079251AABBA77D68C011245E66DC_terseLabel_en-US" xlink:label="lab_mdca_CommunicationsMember_DB21079251AABBA77D68C011245E66DC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Communications</link:label>
    <link:label id="lab_mdca_CommunicationsMember_DB21079251AABBA77D68C011245E66DC_label_en-US" xlink:label="lab_mdca_CommunicationsMember_DB21079251AABBA77D68C011245E66DC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Communications [Member]</link:label>
    <link:label id="lab_mdca_CommunicationsMember_DB21079251AABBA77D68C011245E66DC_documentation_en-US" xlink:label="lab_mdca_CommunicationsMember_DB21079251AABBA77D68C011245E66DC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Communications [Member]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_CommunicationsMember" xlink:label="loc_mdca_CommunicationsMember_DB21079251AABBA77D68C011245E66DC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_CommunicationsMember_DB21079251AABBA77D68C011245E66DC" xlink:to="lab_mdca_CommunicationsMember_DB21079251AABBA77D68C011245E66DC" xlink:type="arc" />
    <link:label id="lab_mdca_AutomotiveMember_8F629E6A356C2061A3B5C011245E746B_terseLabel_en-US" xlink:label="lab_mdca_AutomotiveMember_8F629E6A356C2061A3B5C011245E746B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Automotive</link:label>
    <link:label id="lab_mdca_AutomotiveMember_8F629E6A356C2061A3B5C011245E746B_label_en-US" xlink:label="lab_mdca_AutomotiveMember_8F629E6A356C2061A3B5C011245E746B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Automotive [Member]</link:label>
    <link:label id="lab_mdca_AutomotiveMember_8F629E6A356C2061A3B5C011245E746B_documentation_en-US" xlink:label="lab_mdca_AutomotiveMember_8F629E6A356C2061A3B5C011245E746B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Automotive [Member]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_AutomotiveMember" xlink:label="loc_mdca_AutomotiveMember_8F629E6A356C2061A3B5C011245E746B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_AutomotiveMember_8F629E6A356C2061A3B5C011245E746B" xlink:to="lab_mdca_AutomotiveMember_8F629E6A356C2061A3B5C011245E746B" xlink:type="arc" />
    <link:label id="lab_mdca_TechnologyMember_22FE3A0B6C69E81EC9E2C011245E4038_terseLabel_en-US" xlink:label="lab_mdca_TechnologyMember_22FE3A0B6C69E81EC9E2C011245E4038" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Technology</link:label>
    <link:label id="lab_mdca_TechnologyMember_22FE3A0B6C69E81EC9E2C011245E4038_label_en-US" xlink:label="lab_mdca_TechnologyMember_22FE3A0B6C69E81EC9E2C011245E4038" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Technology [Member]</link:label>
    <link:label id="lab_mdca_TechnologyMember_22FE3A0B6C69E81EC9E2C011245E4038_documentation_en-US" xlink:label="lab_mdca_TechnologyMember_22FE3A0B6C69E81EC9E2C011245E4038" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Technology [Member]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_TechnologyMember" xlink:label="loc_mdca_TechnologyMember_22FE3A0B6C69E81EC9E2C011245E4038" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_TechnologyMember_22FE3A0B6C69E81EC9E2C011245E4038" xlink:to="lab_mdca_TechnologyMember_22FE3A0B6C69E81EC9E2C011245E4038" xlink:type="arc" />
    <link:label id="lab_us-gaap_HealthCareMember_123FE393AE170441B09FC011245E3C1F_terseLabel_en-US" xlink:label="lab_us-gaap_HealthCareMember_123FE393AE170441B09FC011245E3C1F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Healthcare</link:label>
    <link:label id="lab_us-gaap_HealthCareMember_123FE393AE170441B09FC011245E3C1F_label_en-US" xlink:label="lab_us-gaap_HealthCareMember_123FE393AE170441B09FC011245E3C1F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Health Care [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_HealthCareMember" xlink:label="loc_us-gaap_HealthCareMember_123FE393AE170441B09FC011245E3C1F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HealthCareMember_123FE393AE170441B09FC011245E3C1F" xlink:to="lab_us-gaap_HealthCareMember_123FE393AE170441B09FC011245E3C1F" xlink:type="arc" />
    <link:label id="lab_mdca_FinancialsMember_B2728BA57115D5F78259C011245E83B2_terseLabel_en-US" xlink:label="lab_mdca_FinancialsMember_B2728BA57115D5F78259C011245E83B2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financials</link:label>
    <link:label id="lab_mdca_FinancialsMember_B2728BA57115D5F78259C011245E83B2_label_en-US" xlink:label="lab_mdca_FinancialsMember_B2728BA57115D5F78259C011245E83B2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financials [Member]</link:label>
    <link:label id="lab_mdca_FinancialsMember_B2728BA57115D5F78259C011245E83B2_documentation_en-US" xlink:label="lab_mdca_FinancialsMember_B2728BA57115D5F78259C011245E83B2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Financials [Member]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_FinancialsMember" xlink:label="loc_mdca_FinancialsMember_B2728BA57115D5F78259C011245E83B2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_FinancialsMember_B2728BA57115D5F78259C011245E83B2" xlink:to="lab_mdca_FinancialsMember_B2728BA57115D5F78259C011245E83B2" xlink:type="arc" />
    <link:label id="lab_mdca_TransportationandTravelLodgingMember_39ED2D428F6AEB1C248BC011245FEB29_terseLabel_en-US" xlink:label="lab_mdca_TransportationandTravelLodgingMember_39ED2D428F6AEB1C248BC011245FEB29" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Transportation and Travel/Lodging</link:label>
    <link:label id="lab_mdca_TransportationandTravelLodgingMember_39ED2D428F6AEB1C248BC011245FEB29_label_en-US" xlink:label="lab_mdca_TransportationandTravelLodgingMember_39ED2D428F6AEB1C248BC011245FEB29" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Transportation and Travel/Lodging [Member]</link:label>
    <link:label id="lab_mdca_TransportationandTravelLodgingMember_39ED2D428F6AEB1C248BC011245FEB29_documentation_en-US" xlink:label="lab_mdca_TransportationandTravelLodgingMember_39ED2D428F6AEB1C248BC011245FEB29" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Transportation and Travel/Lodging [Member]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_TransportationandTravelLodgingMember" xlink:label="loc_mdca_TransportationandTravelLodgingMember_39ED2D428F6AEB1C248BC011245FEB29" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_TransportationandTravelLodgingMember_39ED2D428F6AEB1C248BC011245FEB29" xlink:to="lab_mdca_TransportationandTravelLodgingMember_39ED2D428F6AEB1C248BC011245FEB29" xlink:type="arc" />
    <link:label id="lab_mdca_OtherMember_6C192DB75A852FB4F497C011245FB3BA_terseLabel_en-US" xlink:label="lab_mdca_OtherMember_6C192DB75A852FB4F497C011245FB3BA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other</link:label>
    <link:label id="lab_mdca_OtherMember_6C192DB75A852FB4F497C011245FB3BA_label_en-US" xlink:label="lab_mdca_OtherMember_6C192DB75A852FB4F497C011245FB3BA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other [Member]</link:label>
    <link:label id="lab_mdca_OtherMember_6C192DB75A852FB4F497C011245FB3BA_documentation_en-US" xlink:label="lab_mdca_OtherMember_6C192DB75A852FB4F497C011245FB3BA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Other [Member]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_OtherMember" xlink:label="loc_mdca_OtherMember_6C192DB75A852FB4F497C011245FB3BA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_OtherMember_6C192DB75A852FB4F497C011245FB3BA" xlink:to="lab_mdca_OtherMember_6C192DB75A852FB4F497C011245FB3BA" xlink:type="arc" />
    <link:label id="lab_srt_StatementGeographicalAxis_ED8AF86E4F3265DC0A6CC011245F7D1A_terseLabel_en-US" xlink:label="lab_srt_StatementGeographicalAxis_ED8AF86E4F3265DC0A6CC011245F7D1A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Geographical [Axis]</link:label>
    <link:label id="lab_srt_StatementGeographicalAxis_ED8AF86E4F3265DC0A6CC011245F7D1A_label_en-US" xlink:label="lab_srt_StatementGeographicalAxis_ED8AF86E4F3265DC0A6CC011245F7D1A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Geographical [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_StatementGeographicalAxis" xlink:label="loc_srt_StatementGeographicalAxis_ED8AF86E4F3265DC0A6CC011245F7D1A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_StatementGeographicalAxis_ED8AF86E4F3265DC0A6CC011245F7D1A" xlink:to="lab_srt_StatementGeographicalAxis_ED8AF86E4F3265DC0A6CC011245F7D1A" xlink:type="arc" />
    <link:label id="lab_srt_SegmentGeographicalDomain_7C263A528B2691392FF6C011245FE037_terseLabel_en-US" xlink:label="lab_srt_SegmentGeographicalDomain_7C263A528B2691392FF6C011245FE037" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Geographical [Domain]</link:label>
    <link:label id="lab_srt_SegmentGeographicalDomain_7C263A528B2691392FF6C011245FE037_label_en-US" xlink:label="lab_srt_SegmentGeographicalDomain_7C263A528B2691392FF6C011245FE037" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Geographical [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_SegmentGeographicalDomain" xlink:label="loc_srt_SegmentGeographicalDomain_7C263A528B2691392FF6C011245FE037" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_SegmentGeographicalDomain_7C263A528B2691392FF6C011245FE037" xlink:to="lab_srt_SegmentGeographicalDomain_7C263A528B2691392FF6C011245FE037" xlink:type="arc" />
    <link:label id="lab_country_US_FFD6972331C25F667405C011245F6F24_verboseLabel_en-US" xlink:label="lab_country_US_FFD6972331C25F667405C011245F6F24" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">United States</link:label>
    <link:label id="lab_country_US_FFD6972331C25F667405C011245F6F24_label_en-US" xlink:label="lab_country_US_FFD6972331C25F667405C011245F6F24" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">UNITED STATES</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_US" xlink:label="loc_country_US_FFD6972331C25F667405C011245F6F24" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_country_US_FFD6972331C25F667405C011245F6F24" xlink:to="lab_country_US_FFD6972331C25F667405C011245F6F24" xlink:type="arc" />
    <link:label id="lab_country_CA_672BF360972D3E718E27C0112460A8CC_verboseLabel_en-US" xlink:label="lab_country_CA_672BF360972D3E718E27C0112460A8CC" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Canada</link:label>
    <link:label id="lab_country_CA_672BF360972D3E718E27C0112460A8CC_label_en-US" xlink:label="lab_country_CA_672BF360972D3E718E27C0112460A8CC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">CANADA</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_CA" xlink:label="loc_country_CA_672BF360972D3E718E27C0112460A8CC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_country_CA_672BF360972D3E718E27C0112460A8CC" xlink:to="lab_country_CA_672BF360972D3E718E27C0112460A8CC" xlink:type="arc" />
    <link:label id="lab_mdca_OtherGeographicalLocationMember_EE5FC872E1944AA8D06FC01124608294_terseLabel_en-US" xlink:label="lab_mdca_OtherGeographicalLocationMember_EE5FC872E1944AA8D06FC01124608294" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other</link:label>
    <link:label id="lab_mdca_OtherGeographicalLocationMember_EE5FC872E1944AA8D06FC01124608294_label_en-US" xlink:label="lab_mdca_OtherGeographicalLocationMember_EE5FC872E1944AA8D06FC01124608294" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Geographical Location [Member]</link:label>
    <link:label id="lab_mdca_OtherGeographicalLocationMember_EE5FC872E1944AA8D06FC01124608294_documentation_en-US" xlink:label="lab_mdca_OtherGeographicalLocationMember_EE5FC872E1944AA8D06FC01124608294" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US" />
    <link:loc xlink:href="mdca-20200630.xsd#mdca_OtherGeographicalLocationMember" xlink:label="loc_mdca_OtherGeographicalLocationMember_EE5FC872E1944AA8D06FC01124608294" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_OtherGeographicalLocationMember_EE5FC872E1944AA8D06FC01124608294" xlink:to="lab_mdca_OtherGeographicalLocationMember_EE5FC872E1944AA8D06FC01124608294" xlink:type="arc" />
    <link:label id="lab_us-gaap_DisaggregationOfRevenueLineItems_3C6C7A571483066F051CC01124603A3C_terseLabel_en-US" xlink:label="lab_us-gaap_DisaggregationOfRevenueLineItems_3C6C7A571483066F051CC01124603A3C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Disaggregation of Revenue [Line Items]</link:label>
    <link:label id="lab_us-gaap_DisaggregationOfRevenueLineItems_3C6C7A571483066F051CC01124603A3C_label_en-US" xlink:label="lab_us-gaap_DisaggregationOfRevenueLineItems_3C6C7A571483066F051CC01124603A3C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disaggregation of Revenue [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisaggregationOfRevenueLineItems" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_3C6C7A571483066F051CC01124603A3C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_3C6C7A571483066F051CC01124603A3C" xlink:to="lab_us-gaap_DisaggregationOfRevenueLineItems_3C6C7A571483066F051CC01124603A3C" xlink:type="arc" />
    <link:label id="lab_us-gaap_Revenues_19523A88416172D5AD6EC0112460DA14_terseLabel_en-US" xlink:label="lab_us-gaap_Revenues_19523A88416172D5AD6EC0112460DA14" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Services</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_19523A88416172D5AD6EC0112460DA14" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Revenues_19523A88416172D5AD6EC0112460DA14" xlink:to="lab_us-gaap_Revenues_19523A88416172D5AD6EC0112460DA14" xlink:type="arc" />
    <link:label id="lab_us-gaap_EarningsPerShareTextBlock_42B08416A2093CD96A37C011245146E1_verboseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareTextBlock_42B08416A2093CD96A37C011245146E1" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Loss Per Common Share</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareTextBlock_42B08416A2093CD96A37C011245146E1_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareTextBlock_42B08416A2093CD96A37C011245146E1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Earnings Per Share [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareTextBlock" xlink:label="loc_us-gaap_EarningsPerShareTextBlock_42B08416A2093CD96A37C011245146E1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerShareTextBlock_42B08416A2093CD96A37C011245146E1" xlink:to="lab_us-gaap_EarningsPerShareTextBlock_42B08416A2093CD96A37C011245146E1" xlink:type="arc" />
    <link:label id="lab_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_9F2292CAE7945108BF05C01123DF7801_terseLabel_en-US" xlink:label="lab_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_9F2292CAE7945108BF05C01123DF7801" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share Capital</link:label>
    <link:label id="lab_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_9F2292CAE7945108BF05C01123DF7801_label_en-US" xlink:label="lab_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_9F2292CAE7945108BF05C01123DF7801" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Payment Arrangement [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_9F2292CAE7945108BF05C01123DF7801" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_9F2292CAE7945108BF05C01123DF7801" xlink:to="lab_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_9F2292CAE7945108BF05C01123DF7801" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementOfFinancialPositionAbstract_E0BDEC9BEB16C722A2ABC41CA47C482B_label_en-US" xlink:label="lab_us-gaap_StatementOfFinancialPositionAbstract_E0BDEC9BEB16C722A2ABC41CA47C482B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement of Financial Position [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="loc_us-gaap_StatementOfFinancialPositionAbstract_E0BDEC9BEB16C722A2ABC41CA47C482B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_E0BDEC9BEB16C722A2ABC41CA47C482B" xlink:to="lab_us-gaap_StatementOfFinancialPositionAbstract_E0BDEC9BEB16C722A2ABC41CA47C482B" xlink:type="arc" />
    <link:label id="lab_us-gaap_AssetsAbstract_4486D77EBACF7C5A11E1C41CA47D2A5A_verboseLabel_en-US" xlink:label="lab_us-gaap_AssetsAbstract_4486D77EBACF7C5A11E1C41CA47D2A5A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">ASSETS</link:label>
    <link:label id="lab_us-gaap_AssetsAbstract_4486D77EBACF7C5A11E1C41CA47D2A5A_label_en-US" xlink:label="lab_us-gaap_AssetsAbstract_4486D77EBACF7C5A11E1C41CA47D2A5A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="loc_us-gaap_AssetsAbstract_4486D77EBACF7C5A11E1C41CA47D2A5A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsAbstract_4486D77EBACF7C5A11E1C41CA47D2A5A" xlink:to="lab_us-gaap_AssetsAbstract_4486D77EBACF7C5A11E1C41CA47D2A5A" xlink:type="arc" />
    <link:label id="lab_us-gaap_AssetsCurrentAbstract_AE56DE2C45ECD5C4DFF4C41CA47DCE0D_terseLabel_en-US" xlink:label="lab_us-gaap_AssetsCurrentAbstract_AE56DE2C45ECD5C4DFF4C41CA47DCE0D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Current Assets:</link:label>
    <link:label id="lab_us-gaap_AssetsCurrentAbstract_AE56DE2C45ECD5C4DFF4C41CA47DCE0D_label_en-US" xlink:label="lab_us-gaap_AssetsCurrentAbstract_AE56DE2C45ECD5C4DFF4C41CA47DCE0D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets, Current [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="loc_us-gaap_AssetsCurrentAbstract_AE56DE2C45ECD5C4DFF4C41CA47DCE0D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsCurrentAbstract_AE56DE2C45ECD5C4DFF4C41CA47DCE0D" xlink:to="lab_us-gaap_AssetsCurrentAbstract_AE56DE2C45ECD5C4DFF4C41CA47DCE0D" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_8E83745CBCFB488AE746C41CA47D6CF5_verboseLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_8E83745CBCFB488AE746C41CA47D6CF5" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Cash and cash equivalents</link:label>
    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_8E83745CBCFB488AE746C41CA47D6CF5_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_8E83745CBCFB488AE746C41CA47D6CF5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash and Cash Equivalents, at Carrying Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_8E83745CBCFB488AE746C41CA47D6CF5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_8E83745CBCFB488AE746C41CA47D6CF5" xlink:to="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_8E83745CBCFB488AE746C41CA47D6CF5" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccountsReceivableNetCurrent_1363E3D3BDC71748B2AEC41CA47E423C_verboseLabel_en-US" xlink:label="lab_us-gaap_AccountsReceivableNetCurrent_1363E3D3BDC71748B2AEC41CA47E423C" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Accounts receivable, less allowance for doubtful accounts of $1,875 and $3,304</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_1363E3D3BDC71748B2AEC41CA47E423C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccountsReceivableNetCurrent_1363E3D3BDC71748B2AEC41CA47E423C" xlink:to="lab_us-gaap_AccountsReceivableNetCurrent_1363E3D3BDC71748B2AEC41CA47E423C" xlink:type="arc" />
    <link:label id="lab_mdca_ExpendituresBillableCurrent_AB5B30CEEB314DC0B505C41CA47EF5EE_verboseLabel_en-US" xlink:label="lab_mdca_ExpendituresBillableCurrent_AB5B30CEEB314DC0B505C41CA47EF5EE" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Expenditures billable to clients</link:label>
    <link:label id="lab_mdca_ExpendituresBillableCurrent_AB5B30CEEB314DC0B505C41CA47EF5EE_label_en-US" xlink:label="lab_mdca_ExpendituresBillableCurrent_AB5B30CEEB314DC0B505C41CA47EF5EE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Expenditures Billable Current</link:label>
    <link:label id="lab_mdca_ExpendituresBillableCurrent_AB5B30CEEB314DC0B505C41CA47EF5EE_documentation_en-US" xlink:label="lab_mdca_ExpendituresBillableCurrent_AB5B30CEEB314DC0B505C41CA47EF5EE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Gross amount of merchandise or goods which are partially completed, are generally comprised of raw materials, labor and factory overhead costs, and which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_ExpendituresBillableCurrent" xlink:label="loc_mdca_ExpendituresBillableCurrent_AB5B30CEEB314DC0B505C41CA47EF5EE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_ExpendituresBillableCurrent_AB5B30CEEB314DC0B505C41CA47EF5EE" xlink:to="lab_mdca_ExpendituresBillableCurrent_AB5B30CEEB314DC0B505C41CA47EF5EE" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherAssetsCurrent_EF605D8ECB71E501437BC41CA47E76A3_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherAssetsCurrent_EF605D8ECB71E501437BC41CA47E76A3" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Other current assets</link:label>
    <link:label id="lab_us-gaap_OtherAssetsCurrent_EF605D8ECB71E501437BC41CA47E76A3_label_en-US" xlink:label="lab_us-gaap_OtherAssetsCurrent_EF605D8ECB71E501437BC41CA47E76A3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Assets, Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherAssetsCurrent" xlink:label="loc_us-gaap_OtherAssetsCurrent_EF605D8ECB71E501437BC41CA47E76A3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherAssetsCurrent_EF605D8ECB71E501437BC41CA47E76A3" xlink:to="lab_us-gaap_OtherAssetsCurrent_EF605D8ECB71E501437BC41CA47E76A3" xlink:type="arc" />
    <link:label id="lab_us-gaap_AssetsCurrent_6E240B899547F50886EEC41CA47E8391_totalLabel_en-US" xlink:label="lab_us-gaap_AssetsCurrent_6E240B899547F50886EEC41CA47E8391" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total Current Assets</link:label>
    <link:label id="lab_us-gaap_AssetsCurrent_6E240B899547F50886EEC41CA47E8391_label_en-US" xlink:label="lab_us-gaap_AssetsCurrent_6E240B899547F50886EEC41CA47E8391" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets, Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaap_AssetsCurrent_6E240B899547F50886EEC41CA47E8391" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsCurrent_6E240B899547F50886EEC41CA47E8391" xlink:to="lab_us-gaap_AssetsCurrent_6E240B899547F50886EEC41CA47E8391" xlink:type="arc" />
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentNet_05E806FEE67E47D2577FC41CA47E3EB8_verboseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet_05E806FEE67E47D2577FC41CA47E3EB8" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Fixed assets, at cost, less accumulated depreciation of $134,529 and $129,579</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentNet_05E806FEE67E47D2577FC41CA47E3EB8_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet_05E806FEE67E47D2577FC41CA47E3EB8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_05E806FEE67E47D2577FC41CA47E3EB8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_05E806FEE67E47D2577FC41CA47E3EB8" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentNet_05E806FEE67E47D2577FC41CA47E3EB8" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLeaseRightOfUseAsset_86733BC7F4C447AF238EC41CA47E78D2_verboseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseRightOfUseAsset_86733BC7F4C447AF238EC41CA47E78D2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Right of use assets - operating leases</link:label>
    <link:label id="lab_us-gaap_OperatingLeaseRightOfUseAsset_86733BC7F4C447AF238EC41CA47E78D2_label_en-US" xlink:label="lab_us-gaap_OperatingLeaseRightOfUseAsset_86733BC7F4C447AF238EC41CA47E78D2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Lease, Right-of-Use Asset</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_86733BC7F4C447AF238EC41CA47E78D2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeaseRightOfUseAsset_86733BC7F4C447AF238EC41CA47E78D2" xlink:to="lab_us-gaap_OperatingLeaseRightOfUseAsset_86733BC7F4C447AF238EC41CA47E78D2" xlink:type="arc" />
    <link:label id="lab_us-gaap_Goodwill_D3D3CDF20CF8A96BFE8FC41CA47E0AFE_verboseLabel_en-US" xlink:label="lab_us-gaap_Goodwill_D3D3CDF20CF8A96BFE8FC41CA47E0AFE" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Goodwill</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_D3D3CDF20CF8A96BFE8FC41CA47E0AFE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Goodwill_D3D3CDF20CF8A96BFE8FC41CA47E0AFE" xlink:to="lab_us-gaap_Goodwill_D3D3CDF20CF8A96BFE8FC41CA47E0AFE" xlink:type="arc" />
    <link:label id="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_FD7AC9AD7D4F08781395C41CA47F819A_terseLabel_en-US" xlink:label="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_FD7AC9AD7D4F08781395C41CA47F819A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other intangible assets, net</link:label>
    <link:label id="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_FD7AC9AD7D4F08781395C41CA47F819A_label_en-US" xlink:label="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_FD7AC9AD7D4F08781395C41CA47F819A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Intangible Assets, Net (Excluding Goodwill)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_FD7AC9AD7D4F08781395C41CA47F819A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_FD7AC9AD7D4F08781395C41CA47F819A" xlink:to="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_FD7AC9AD7D4F08781395C41CA47F819A" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherAssetsNoncurrent_1C6E865F4DAF3E1C2D45C41CA47F06D7_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherAssetsNoncurrent_1C6E865F4DAF3E1C2D45C41CA47F06D7" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Other assets</link:label>
    <link:label id="lab_us-gaap_OtherAssetsNoncurrent_1C6E865F4DAF3E1C2D45C41CA47F06D7_label_en-US" xlink:label="lab_us-gaap_OtherAssetsNoncurrent_1C6E865F4DAF3E1C2D45C41CA47F06D7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Assets, Noncurrent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_1C6E865F4DAF3E1C2D45C41CA47F06D7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherAssetsNoncurrent_1C6E865F4DAF3E1C2D45C41CA47F06D7" xlink:to="lab_us-gaap_OtherAssetsNoncurrent_1C6E865F4DAF3E1C2D45C41CA47F06D7" xlink:type="arc" />
    <link:label id="lab_us-gaap_Assets_F7FD3831C55BC8D3897DC41CA47F2466_totalLabel_en-US" xlink:label="lab_us-gaap_Assets_F7FD3831C55BC8D3897DC41CA47F2466" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_F7FD3831C55BC8D3897DC41CA47F2466" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Assets_F7FD3831C55BC8D3897DC41CA47F2466" xlink:to="lab_us-gaap_Assets_F7FD3831C55BC8D3897DC41CA47F2466" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_051F4D0EDE497F3B0CC0C41CA47F5179_verboseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_051F4D0EDE497F3B0CC0C41CA47F5179" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">LIABILITIES, REDEEMABLE NONCONTROLLING INTERESTS, AND SHAREHOLDERS&#8217; DEFICIT</link:label>
    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_051F4D0EDE497F3B0CC0C41CA47F5179_label_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_051F4D0EDE497F3B0CC0C41CA47F5179" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities and Equity [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_051F4D0EDE497F3B0CC0C41CA47F5179" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_051F4D0EDE497F3B0CC0C41CA47F5179" xlink:to="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_051F4D0EDE497F3B0CC0C41CA47F5179" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilitiesCurrentAbstract_D4F861A970DDD0EB74F4C41CA47FC0CC_verboseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrentAbstract_D4F861A970DDD0EB74F4C41CA47FC0CC" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Current Liabilities:</link:label>
    <link:label id="lab_us-gaap_LiabilitiesCurrentAbstract_D4F861A970DDD0EB74F4C41CA47FC0CC_label_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrentAbstract_D4F861A970DDD0EB74F4C41CA47FC0CC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities, Current [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_D4F861A970DDD0EB74F4C41CA47FC0CC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_D4F861A970DDD0EB74F4C41CA47FC0CC" xlink:to="lab_us-gaap_LiabilitiesCurrentAbstract_D4F861A970DDD0EB74F4C41CA47FC0CC" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccountsPayableCurrent_84FD4E9A8AA14C30FB3EC41CA4803947_verboseLabel_en-US" xlink:label="lab_us-gaap_AccountsPayableCurrent_84FD4E9A8AA14C30FB3EC41CA4803947" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Accounts payable</link:label>
    <link:label id="lab_us-gaap_AccountsPayableCurrent_84FD4E9A8AA14C30FB3EC41CA4803947_label_en-US" xlink:label="lab_us-gaap_AccountsPayableCurrent_84FD4E9A8AA14C30FB3EC41CA4803947" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accounts Payable, Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:label="loc_us-gaap_AccountsPayableCurrent_84FD4E9A8AA14C30FB3EC41CA4803947" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccountsPayableCurrent_84FD4E9A8AA14C30FB3EC41CA4803947" xlink:to="lab_us-gaap_AccountsPayableCurrent_84FD4E9A8AA14C30FB3EC41CA4803947" xlink:type="arc" />
    <link:label id="lab_us-gaap_ContractWithCustomerLiability_6E6634DDEE0AAF7C8D76C41CA480C512_terseLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerLiability_6E6634DDEE0AAF7C8D76C41CA480C512" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Advance billings</link:label>
    <link:label id="lab_us-gaap_ContractWithCustomerLiability_6E6634DDEE0AAF7C8D76C41CA480C512_label_en-US" xlink:label="lab_us-gaap_ContractWithCustomerLiability_6E6634DDEE0AAF7C8D76C41CA480C512" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contract with Customer, Liability</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ContractWithCustomerLiability" xlink:label="loc_us-gaap_ContractWithCustomerLiability_6E6634DDEE0AAF7C8D76C41CA480C512" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractWithCustomerLiability_6E6634DDEE0AAF7C8D76C41CA480C512" xlink:to="lab_us-gaap_ContractWithCustomerLiability_6E6634DDEE0AAF7C8D76C41CA480C512" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLeaseLiabilityCurrent_4A849F6B552AFDB0D97FC41CA48023A0_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiabilityCurrent_4A849F6B552AFDB0D97FC41CA48023A0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Current portion of lease liabilities - operating leases</link:label>
    <link:label id="lab_us-gaap_OperatingLeaseLiabilityCurrent_4A849F6B552AFDB0D97FC41CA48023A0_label_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiabilityCurrent_4A849F6B552AFDB0D97FC41CA48023A0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Lease, Liability, Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiabilityCurrent" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_4A849F6B552AFDB0D97FC41CA48023A0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeaseLiabilityCurrent_4A849F6B552AFDB0D97FC41CA48023A0" xlink:to="lab_us-gaap_OperatingLeaseLiabilityCurrent_4A849F6B552AFDB0D97FC41CA48023A0" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessCombinationContingentConsiderationLiabilityCurrent_A40CCC24E045D38EF3D6C41CA4818760_verboseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationContingentConsiderationLiabilityCurrent_A40CCC24E045D38EF3D6C41CA4818760" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Current portion of deferred acquisition consideration</link:label>
    <link:label id="lab_us-gaap_BusinessCombinationContingentConsiderationLiabilityCurrent_A40CCC24E045D38EF3D6C41CA4818760_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationContingentConsiderationLiabilityCurrent_A40CCC24E045D38EF3D6C41CA4818760" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Contingent Consideration, Liability, Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationLiabilityCurrent" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiabilityCurrent_A40CCC24E045D38EF3D6C41CA4818760" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessCombinationContingentConsiderationLiabilityCurrent_A40CCC24E045D38EF3D6C41CA4818760" xlink:to="lab_us-gaap_BusinessCombinationContingentConsiderationLiabilityCurrent_A40CCC24E045D38EF3D6C41CA4818760" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilitiesCurrent_5C768A9222AC92FCA796C41CA481EB94_totalLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrent_5C768A9222AC92FCA796C41CA481EB94" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total Current Liabilities</link:label>
    <link:label id="lab_us-gaap_LiabilitiesCurrent_5C768A9222AC92FCA796C41CA481EB94_label_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrent_5C768A9222AC92FCA796C41CA481EB94" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities, Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaap_LiabilitiesCurrent_5C768A9222AC92FCA796C41CA481EB94" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesCurrent_5C768A9222AC92FCA796C41CA481EB94" xlink:to="lab_us-gaap_LiabilitiesCurrent_5C768A9222AC92FCA796C41CA481EB94" xlink:type="arc" />
    <link:label id="lab_us-gaap_LongTermDebtNoncurrent_EE5D9F80F6132666AC2DC41CA481893D_verboseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtNoncurrent_EE5D9F80F6132666AC2DC41CA481893D" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Long-term debt</link:label>
    <link:label id="lab_us-gaap_LongTermDebtNoncurrent_EE5D9F80F6132666AC2DC41CA481893D_label_en-US" xlink:label="lab_us-gaap_LongTermDebtNoncurrent_EE5D9F80F6132666AC2DC41CA481893D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Debt, Excluding Current Maturities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_EE5D9F80F6132666AC2DC41CA481893D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermDebtNoncurrent_EE5D9F80F6132666AC2DC41CA481893D" xlink:to="lab_us-gaap_LongTermDebtNoncurrent_EE5D9F80F6132666AC2DC41CA481893D" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessCombinationContingentConsiderationLiabilityNoncurrent_A4D444D82F591802121CC41CA4817579_verboseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationContingentConsiderationLiabilityNoncurrent_A4D444D82F591802121CC41CA4817579" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Long-term portion of deferred acquisition consideration</link:label>
    <link:label id="lab_us-gaap_BusinessCombinationContingentConsiderationLiabilityNoncurrent_A4D444D82F591802121CC41CA4817579_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationContingentConsiderationLiabilityNoncurrent_A4D444D82F591802121CC41CA4817579" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Contingent Consideration, Liability, Noncurrent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationLiabilityNoncurrent" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiabilityNoncurrent_A4D444D82F591802121CC41CA4817579" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessCombinationContingentConsiderationLiabilityNoncurrent_A4D444D82F591802121CC41CA4817579" xlink:to="lab_us-gaap_BusinessCombinationContingentConsiderationLiabilityNoncurrent_A4D444D82F591802121CC41CA4817579" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLeaseLiabilityNoncurrent_EBD45B5D8919311F93E0C41CA481DF37_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiabilityNoncurrent_EBD45B5D8919311F93E0C41CA481DF37" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Long-term lease liabilities - operating leases</link:label>
    <link:label id="lab_us-gaap_OperatingLeaseLiabilityNoncurrent_EBD45B5D8919311F93E0C41CA481DF37_label_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiabilityNoncurrent_EBD45B5D8919311F93E0C41CA481DF37" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Lease, Liability, Noncurrent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_EBD45B5D8919311F93E0C41CA481DF37" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_EBD45B5D8919311F93E0C41CA481DF37" xlink:to="lab_us-gaap_OperatingLeaseLiabilityNoncurrent_EBD45B5D8919311F93E0C41CA481DF37" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherLiabilitiesNoncurrent_F35E380266E3ECD487B5C41CA481485E_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherLiabilitiesNoncurrent_F35E380266E3ECD487B5C41CA481485E" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Other liabilities</link:label>
    <link:label id="lab_us-gaap_OtherLiabilitiesNoncurrent_F35E380266E3ECD487B5C41CA481485E_label_en-US" xlink:label="lab_us-gaap_OtherLiabilitiesNoncurrent_F35E380266E3ECD487B5C41CA481485E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Liabilities, Noncurrent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_F35E380266E3ECD487B5C41CA481485E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherLiabilitiesNoncurrent_F35E380266E3ECD487B5C41CA481485E" xlink:to="lab_us-gaap_OtherLiabilitiesNoncurrent_F35E380266E3ECD487B5C41CA481485E" xlink:type="arc" />
    <link:label id="lab_us-gaap_Liabilities_B24F610A4FE5BFDDC9D3C41CA48236BB_totalLabel_en-US" xlink:label="lab_us-gaap_Liabilities_B24F610A4FE5BFDDC9D3C41CA48236BB" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total Liabilities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaap_Liabilities_B24F610A4FE5BFDDC9D3C41CA48236BB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Liabilities_B24F610A4FE5BFDDC9D3C41CA48236BB" xlink:to="lab_us-gaap_Liabilities_B24F610A4FE5BFDDC9D3C41CA48236BB" xlink:type="arc" />
    <link:label id="lab_us-gaap_RedeemableNoncontrollingInterestEquityFairValue_722CF2664FBCC8A207A1C41CA4829193_verboseLabel_en-US" xlink:label="lab_us-gaap_RedeemableNoncontrollingInterestEquityFairValue_722CF2664FBCC8A207A1C41CA4829193" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Redeemable Noncontrolling Interests</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RedeemableNoncontrollingInterestEquityFairValue" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestEquityFairValue_722CF2664FBCC8A207A1C41CA4829193" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestEquityFairValue_722CF2664FBCC8A207A1C41CA4829193" xlink:to="lab_us-gaap_RedeemableNoncontrollingInterestEquityFairValue_722CF2664FBCC8A207A1C41CA4829193" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommitmentsAndContingencies_265CE54C2C6030BD2A7FC41CA4824138_terseLabel_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingencies_265CE54C2C6030BD2A7FC41CA4824138" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Commitments, Contingencies, and Guarantees (Note 9)</link:label>
    <link:label id="lab_us-gaap_CommitmentsAndContingencies_265CE54C2C6030BD2A7FC41CA4824138_label_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingencies_265CE54C2C6030BD2A7FC41CA4824138" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Commitments and Contingencies</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="loc_us-gaap_CommitmentsAndContingencies_265CE54C2C6030BD2A7FC41CA4824138" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommitmentsAndContingencies_265CE54C2C6030BD2A7FC41CA4824138" xlink:to="lab_us-gaap_CommitmentsAndContingencies_265CE54C2C6030BD2A7FC41CA4824138" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_667C0FDF46BDA78E6D28C41CA482E6A7_verboseLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_667C0FDF46BDA78E6D28C41CA482E6A7" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Shareholders&#8217; Deficit:</link:label>
    <link:label id="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_667C0FDF46BDA78E6D28C41CA482E6A7_label_en-US" xlink:label="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_667C0FDF46BDA78E6D28C41CA482E6A7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_667C0FDF46BDA78E6D28C41CA482E6A7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_667C0FDF46BDA78E6D28C41CA482E6A7" xlink:to="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_667C0FDF46BDA78E6D28C41CA482E6A7" xlink:type="arc" />
    <link:label id="lab_us-gaap_PreferredStockValue_335E8EE7FAC9C6D0780AC41CA482034B_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockValue_335E8EE7FAC9C6D0780AC41CA482034B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Convertible preference shares, 145,000 authorized, issued and outstanding at June 30, 2020 and December 31, 2019</link:label>
    <link:label id="lab_us-gaap_PreferredStockValue_335E8EE7FAC9C6D0780AC41CA482034B_label_en-US" xlink:label="lab_us-gaap_PreferredStockValue_335E8EE7FAC9C6D0780AC41CA482034B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Preferred Stock, Value, Issued</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="loc_us-gaap_PreferredStockValue_335E8EE7FAC9C6D0780AC41CA482034B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PreferredStockValue_335E8EE7FAC9C6D0780AC41CA482034B" xlink:to="lab_us-gaap_PreferredStockValue_335E8EE7FAC9C6D0780AC41CA482034B" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommonStockValue_6ABBAD95E4B0B9CB0199C41CA48338DE_verboseLabel_en-US" xlink:label="lab_us-gaap_CommonStockValue_6ABBAD95E4B0B9CB0199C41CA48338DE" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Common stock and other paid-in capital</link:label>
    <link:label id="lab_us-gaap_CommonStockValue_6ABBAD95E4B0B9CB0199C41CA48338DE_label_en-US" xlink:label="lab_us-gaap_CommonStockValue_6ABBAD95E4B0B9CB0199C41CA48338DE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock, Value, Issued</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockValue" xlink:label="loc_us-gaap_CommonStockValue_6ABBAD95E4B0B9CB0199C41CA48338DE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockValue_6ABBAD95E4B0B9CB0199C41CA48338DE" xlink:to="lab_us-gaap_CommonStockValue_6ABBAD95E4B0B9CB0199C41CA48338DE" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_17F518503FF2E7808429C41CA483DC34_verboseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_17F518503FF2E7808429C41CA483DC34" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Accumulated other comprehensive loss (income)</link:label>
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_17F518503FF2E7808429C41CA483DC34_label_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_17F518503FF2E7808429C41CA483DC34" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accumulated Other Comprehensive Income (Loss), Net of Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_17F518503FF2E7808429C41CA483DC34" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_17F518503FF2E7808429C41CA483DC34" xlink:to="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_17F518503FF2E7808429C41CA483DC34" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockholdersEquity_CF86E3FA3ECFD47C64F1C41CA4832D6B_totalLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquity_CF86E3FA3ECFD47C64F1C41CA4832D6B" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">MDC Partners Inc. Shareholders' Deficit</link:label>
    <link:label id="lab_us-gaap_StockholdersEquity_CF86E3FA3ECFD47C64F1C41CA4832D6B_label_en-US" xlink:label="lab_us-gaap_StockholdersEquity_CF86E3FA3ECFD47C64F1C41CA4832D6B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stockholders' Equity Attributable to Parent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_CF86E3FA3ECFD47C64F1C41CA4832D6B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquity_CF86E3FA3ECFD47C64F1C41CA4832D6B" xlink:to="lab_us-gaap_StockholdersEquity_CF86E3FA3ECFD47C64F1C41CA4832D6B" xlink:type="arc" />
    <link:label id="lab_us-gaap_MinorityInterest_092B280E15257DD5871BC41CA484FC48_verboseLabel_en-US" xlink:label="lab_us-gaap_MinorityInterest_092B280E15257DD5871BC41CA484FC48" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Noncontrolling interests</link:label>
    <link:label id="lab_us-gaap_MinorityInterest_092B280E15257DD5871BC41CA484FC48_label_en-US" xlink:label="lab_us-gaap_MinorityInterest_092B280E15257DD5871BC41CA484FC48" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stockholders' Equity Attributable to Noncontrolling Interest</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MinorityInterest" xlink:label="loc_us-gaap_MinorityInterest_092B280E15257DD5871BC41CA484FC48" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MinorityInterest_092B280E15257DD5871BC41CA484FC48" xlink:to="lab_us-gaap_MinorityInterest_092B280E15257DD5871BC41CA484FC48" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_E33E11DC73479518C424C41CA484B97A_totalLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_E33E11DC73479518C424C41CA484B97A" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total Shareholders' Deficit</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_E33E11DC73479518C424C41CA484B97A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_E33E11DC73479518C424C41CA484B97A" xlink:to="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_E33E11DC73479518C424C41CA484B97A" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquity_F57A140EA49CAA85D757C41CA4846C14_totalLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquity_F57A140EA49CAA85D757C41CA4846C14" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total Liabilities, Redeemable Noncontrolling Interests and Shareholders' Deficit</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_F57A140EA49CAA85D757C41CA4846C14" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_F57A140EA49CAA85D757C41CA4846C14" xlink:to="lab_us-gaap_LiabilitiesAndStockholdersEquity_F57A140EA49CAA85D757C41CA4846C14" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_0BE02609E137077FD7FDC01123937B1D_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_0BE02609E137077FD7FDC01123937B1D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Segment Reporting Information, by Segment</link:label>
    <link:label id="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_0BE02609E137077FD7FDC01123937B1D_label_en-US" xlink:label="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_0BE02609E137077FD7FDC01123937B1D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Segment Reporting Information, by Segment [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_0BE02609E137077FD7FDC01123937B1D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_0BE02609E137077FD7FDC01123937B1D" xlink:to="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_0BE02609E137077FD7FDC01123937B1D" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_43502B8711EC0AA222F7C011244FC898_verboseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_43502B8711EC0AA222F7C011244FC898" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Calculation of Numerator and Denominator in Earnings Per Share</link:label>
    <link:label id="lab_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_43502B8711EC0AA222F7C011244FC898_label_en-US" xlink:label="lab_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_43502B8711EC0AA222F7C011244FC898" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_43502B8711EC0AA222F7C011244FC898" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_43502B8711EC0AA222F7C011244FC898" xlink:to="lab_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_43502B8711EC0AA222F7C011244FC898" xlink:type="arc" />
    <link:label id="lab_mdca_IndustryVerticalMember_D0EFE5B6C2EAE8A0E981C011246633C4_terseLabel_en-US" xlink:label="lab_mdca_IndustryVerticalMember_D0EFE5B6C2EAE8A0E981C011246633C4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Industry Vertical</link:label>
    <link:label id="lab_mdca_IndustryVerticalMember_D0EFE5B6C2EAE8A0E981C011246633C4_label_en-US" xlink:label="lab_mdca_IndustryVerticalMember_D0EFE5B6C2EAE8A0E981C011246633C4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Industry Vertical [Member]</link:label>
    <link:label id="lab_mdca_IndustryVerticalMember_D0EFE5B6C2EAE8A0E981C011246633C4_documentation_en-US" xlink:label="lab_mdca_IndustryVerticalMember_D0EFE5B6C2EAE8A0E981C011246633C4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Industry Vertical [Member]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_IndustryVerticalMember" xlink:label="loc_mdca_IndustryVerticalMember_D0EFE5B6C2EAE8A0E981C011246633C4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_IndustryVerticalMember_D0EFE5B6C2EAE8A0E981C011246633C4" xlink:to="lab_mdca_IndustryVerticalMember_D0EFE5B6C2EAE8A0E981C011246633C4" xlink:type="arc" />
    <link:label id="lab_mdca_ByLocationMember_40D7E224DB14F0E80F3EC0112467C97A_terseLabel_en-US" xlink:label="lab_mdca_ByLocationMember_40D7E224DB14F0E80F3EC0112467C97A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">By Location</link:label>
    <link:label id="lab_mdca_ByLocationMember_40D7E224DB14F0E80F3EC0112467C97A_label_en-US" xlink:label="lab_mdca_ByLocationMember_40D7E224DB14F0E80F3EC0112467C97A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">By Location [Member]</link:label>
    <link:label id="lab_mdca_ByLocationMember_40D7E224DB14F0E80F3EC0112467C97A_documentation_en-US" xlink:label="lab_mdca_ByLocationMember_40D7E224DB14F0E80F3EC0112467C97A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">By Location [Member]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_ByLocationMember" xlink:label="loc_mdca_ByLocationMember_40D7E224DB14F0E80F3EC0112467C97A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_ByLocationMember_40D7E224DB14F0E80F3EC0112467C97A" xlink:to="lab_mdca_ByLocationMember_40D7E224DB14F0E80F3EC0112467C97A" xlink:type="arc" />
    <link:label id="lab_us-gaap_DisaggregationOfRevenueTableTextBlock_2DB450AC5F2FDA0E4170C011246719E9_terseLabel_en-US" xlink:label="lab_us-gaap_DisaggregationOfRevenueTableTextBlock_2DB450AC5F2FDA0E4170C011246719E9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Disaggregation of Revenue</link:label>
    <link:label id="lab_us-gaap_DisaggregationOfRevenueTableTextBlock_2DB450AC5F2FDA0E4170C011246719E9_label_en-US" xlink:label="lab_us-gaap_DisaggregationOfRevenueTableTextBlock_2DB450AC5F2FDA0E4170C011246719E9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disaggregation of Revenue [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisaggregationOfRevenueTableTextBlock" xlink:label="loc_us-gaap_DisaggregationOfRevenueTableTextBlock_2DB450AC5F2FDA0E4170C011246719E9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DisaggregationOfRevenueTableTextBlock_2DB450AC5F2FDA0E4170C011246719E9" xlink:to="lab_us-gaap_DisaggregationOfRevenueTableTextBlock_2DB450AC5F2FDA0E4170C011246719E9" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeStatementAbstract_1CE9FFD42523A22CD37AC011251ECC8F_label_en-US" xlink:label="lab_us-gaap_IncomeStatementAbstract_1CE9FFD42523A22CD37AC011251ECC8F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Statement [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeStatementAbstract" xlink:label="loc_us-gaap_IncomeStatementAbstract_1CE9FFD42523A22CD37AC011251ECC8F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeStatementAbstract_1CE9FFD42523A22CD37AC011251ECC8F" xlink:to="lab_us-gaap_IncomeStatementAbstract_1CE9FFD42523A22CD37AC011251ECC8F" xlink:type="arc" />
    <link:label id="lab_mdca_Series4ConvertiblePreferredStockDomain_8DDFB47923BF35B2C6DDC011251F9078_terseLabel_en-US" xlink:label="lab_mdca_Series4ConvertiblePreferredStockDomain_8DDFB47923BF35B2C6DDC011251F9078" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Series 4 Convertible Preferred Stock [Domain]</link:label>
    <link:label id="lab_mdca_Series4ConvertiblePreferredStockDomain_8DDFB47923BF35B2C6DDC011251F9078_label_en-US" xlink:label="lab_mdca_Series4ConvertiblePreferredStockDomain_8DDFB47923BF35B2C6DDC011251F9078" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Series 4 Convertible Preferred Stock [Domain]</link:label>
    <link:label id="lab_mdca_Series4ConvertiblePreferredStockDomain_8DDFB47923BF35B2C6DDC011251F9078_documentation_en-US" xlink:label="lab_mdca_Series4ConvertiblePreferredStockDomain_8DDFB47923BF35B2C6DDC011251F9078" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Series 4 Convertible Preferred Stock [Domain]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_Series4ConvertiblePreferredStockDomain" xlink:label="loc_mdca_Series4ConvertiblePreferredStockDomain_8DDFB47923BF35B2C6DDC011251F9078" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_Series4ConvertiblePreferredStockDomain_8DDFB47923BF35B2C6DDC011251F9078" xlink:to="lab_mdca_Series4ConvertiblePreferredStockDomain_8DDFB47923BF35B2C6DDC011251F9078" xlink:type="arc" />
    <link:label id="lab_us-gaap_RevenuesAbstract_68F53538ACAD780B95F9C0112520AADC_verboseLabel_en-US" xlink:label="lab_us-gaap_RevenuesAbstract_68F53538ACAD780B95F9C0112520AADC" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Revenue:</link:label>
    <link:label id="lab_us-gaap_RevenuesAbstract_68F53538ACAD780B95F9C0112520AADC_label_en-US" xlink:label="lab_us-gaap_RevenuesAbstract_68F53538ACAD780B95F9C0112520AADC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenues [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenuesAbstract" xlink:label="loc_us-gaap_RevenuesAbstract_68F53538ACAD780B95F9C0112520AADC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevenuesAbstract_68F53538ACAD780B95F9C0112520AADC" xlink:to="lab_us-gaap_RevenuesAbstract_68F53538ACAD780B95F9C0112520AADC" xlink:type="arc" />
    <link:label id="lab_us-gaap_CostsAndExpensesAbstract_7C1C29E1A7FBDCB0868EC011252141F1_verboseLabel_en-US" xlink:label="lab_us-gaap_CostsAndExpensesAbstract_7C1C29E1A7FBDCB0868EC011252141F1" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Operating expenses:</link:label>
    <link:label id="lab_us-gaap_CostsAndExpensesAbstract_7C1C29E1A7FBDCB0868EC011252141F1_label_en-US" xlink:label="lab_us-gaap_CostsAndExpensesAbstract_7C1C29E1A7FBDCB0868EC011252141F1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Costs and Expenses [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CostsAndExpensesAbstract" xlink:label="loc_us-gaap_CostsAndExpensesAbstract_7C1C29E1A7FBDCB0868EC011252141F1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_7C1C29E1A7FBDCB0868EC011252141F1" xlink:to="lab_us-gaap_CostsAndExpensesAbstract_7C1C29E1A7FBDCB0868EC011252141F1" xlink:type="arc" />
    <link:label id="lab_us-gaap_CostOfGoodsAndServicesSold_A8FAC4A576006B878609C01125213FB7_terseLabel_en-US" xlink:label="lab_us-gaap_CostOfGoodsAndServicesSold_A8FAC4A576006B878609C01125213FB7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cost of services sold</link:label>
    <link:label id="lab_us-gaap_CostOfGoodsAndServicesSold_A8FAC4A576006B878609C01125213FB7_label_en-US" xlink:label="lab_us-gaap_CostOfGoodsAndServicesSold_A8FAC4A576006B878609C01125213FB7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cost of Goods and Services Sold</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_A8FAC4A576006B878609C01125213FB7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CostOfGoodsAndServicesSold_A8FAC4A576006B878609C01125213FB7" xlink:to="lab_us-gaap_CostOfGoodsAndServicesSold_A8FAC4A576006B878609C01125213FB7" xlink:type="arc" />
    <link:label id="lab_us-gaap_GeneralAndAdministrativeExpense_67FC63A9DEAA3E82785BC011252162CE_verboseLabel_en-US" xlink:label="lab_us-gaap_GeneralAndAdministrativeExpense_67FC63A9DEAA3E82785BC011252162CE" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Office and general expenses</link:label>
    <link:label id="lab_us-gaap_GeneralAndAdministrativeExpense_67FC63A9DEAA3E82785BC011252162CE_label_en-US" xlink:label="lab_us-gaap_GeneralAndAdministrativeExpense_67FC63A9DEAA3E82785BC011252162CE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">General and Administrative Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GeneralAndAdministrativeExpense" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_67FC63A9DEAA3E82785BC011252162CE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GeneralAndAdministrativeExpense_67FC63A9DEAA3E82785BC011252162CE" xlink:to="lab_us-gaap_GeneralAndAdministrativeExpense_67FC63A9DEAA3E82785BC011252162CE" xlink:type="arc" />
    <link:label id="lab_us-gaap_DepreciationAndAmortization_AFCD1A90FDB3B8C2223FC0112521258A_verboseLabel_en-US" xlink:label="lab_us-gaap_DepreciationAndAmortization_AFCD1A90FDB3B8C2223FC0112521258A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Depreciation and amortization</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DepreciationAndAmortization" xlink:label="loc_us-gaap_DepreciationAndAmortization_AFCD1A90FDB3B8C2223FC0112521258A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DepreciationAndAmortization_AFCD1A90FDB3B8C2223FC0112521258A" xlink:to="lab_us-gaap_DepreciationAndAmortization_AFCD1A90FDB3B8C2223FC0112521258A" xlink:type="arc" />
    <link:label id="lab_us-gaap_CostsAndExpenses_5CB6F920D524E03B5B05C0112522648E_totalLabel_en-US" xlink:label="lab_us-gaap_CostsAndExpenses_5CB6F920D524E03B5B05C0112522648E" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Costs and Expenses, Total</link:label>
    <link:label id="lab_us-gaap_CostsAndExpenses_5CB6F920D524E03B5B05C0112522648E_label_en-US" xlink:label="lab_us-gaap_CostsAndExpenses_5CB6F920D524E03B5B05C0112522648E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Costs and Expenses</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CostsAndExpenses" xlink:label="loc_us-gaap_CostsAndExpenses_5CB6F920D524E03B5B05C0112522648E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CostsAndExpenses_5CB6F920D524E03B5B05C0112522648E" xlink:to="lab_us-gaap_CostsAndExpenses_5CB6F920D524E03B5B05C0112522648E" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingIncomeLoss_50383370F318D91EC913C01125226F49_totalLabel_en-US" xlink:label="lab_us-gaap_OperatingIncomeLoss_50383370F318D91EC913C01125226F49" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Operating income (loss)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_50383370F318D91EC913C01125226F49" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingIncomeLoss_50383370F318D91EC913C01125226F49" xlink:to="lab_us-gaap_OperatingIncomeLoss_50383370F318D91EC913C01125226F49" xlink:type="arc" />
    <link:label id="lab_us-gaap_NonoperatingIncomeExpenseAbstract_66378CFF9DED4F3D1DB0C011252240E7_terseLabel_en-US" xlink:label="lab_us-gaap_NonoperatingIncomeExpenseAbstract_66378CFF9DED4F3D1DB0C011252240E7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other income (expense):</link:label>
    <link:label id="lab_us-gaap_NonoperatingIncomeExpenseAbstract_66378CFF9DED4F3D1DB0C011252240E7_label_en-US" xlink:label="lab_us-gaap_NonoperatingIncomeExpenseAbstract_66378CFF9DED4F3D1DB0C011252240E7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Nonoperating Income (Expense) [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NonoperatingIncomeExpenseAbstract" xlink:label="loc_us-gaap_NonoperatingIncomeExpenseAbstract_66378CFF9DED4F3D1DB0C011252240E7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_66378CFF9DED4F3D1DB0C011252240E7" xlink:to="lab_us-gaap_NonoperatingIncomeExpenseAbstract_66378CFF9DED4F3D1DB0C011252240E7" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestAndDebtExpense_1C5A76308707210D74B3C0112522A87A_negatedLabel_en-US" xlink:label="lab_us-gaap_InterestAndDebtExpense_1C5A76308707210D74B3C0112522A87A" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Interest expense and finance charges, net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestAndDebtExpense" xlink:label="loc_us-gaap_InterestAndDebtExpense_1C5A76308707210D74B3C0112522A87A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestAndDebtExpense_1C5A76308707210D74B3C0112522A87A" xlink:to="lab_us-gaap_InterestAndDebtExpense_1C5A76308707210D74B3C0112522A87A" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherNonoperatingIncomeExpense_85347132B092B82101DFC0112522A548_terseLabel_en-US" xlink:label="lab_us-gaap_OtherNonoperatingIncomeExpense_85347132B092B82101DFC0112522A548" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other, net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_85347132B092B82101DFC0112522A548" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherNonoperatingIncomeExpense_85347132B092B82101DFC0112522A548" xlink:to="lab_us-gaap_OtherNonoperatingIncomeExpense_85347132B092B82101DFC0112522A548" xlink:type="arc" />
    <link:label id="lab_us-gaap_NonoperatingIncomeExpense_E29C7EF58A52F9E79E72C0112523DA5A_totalLabel_en-US" xlink:label="lab_us-gaap_NonoperatingIncomeExpense_E29C7EF58A52F9E79E72C0112523DA5A" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Nonoperating Income (Expense), Total</link:label>
    <link:label id="lab_us-gaap_NonoperatingIncomeExpense_E29C7EF58A52F9E79E72C0112523DA5A_label_en-US" xlink:label="lab_us-gaap_NonoperatingIncomeExpense_E29C7EF58A52F9E79E72C0112523DA5A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Nonoperating Income (Expense)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_E29C7EF58A52F9E79E72C0112523DA5A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_E29C7EF58A52F9E79E72C0112523DA5A" xlink:to="lab_us-gaap_NonoperatingIncomeExpense_E29C7EF58A52F9E79E72C0112523DA5A" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_43C90CB27A9EBCEA0321C01125233692_totalLabel_en-US" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_43C90CB27A9EBCEA0321C01125233692" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Income (loss) before income taxes and equity in earnings of non-consolidated affiliates</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_43C90CB27A9EBCEA0321C01125233692" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_43C90CB27A9EBCEA0321C01125233692" xlink:to="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_43C90CB27A9EBCEA0321C01125233692" xlink:type="arc" />
    <link:label id="lab_mdca_IncomeLossFromContinuingOperationsBeforeEquityInEarningsOfNonconsolidatedAffiliates_4F531F76F5A3C22E562CC0112523CF88_totalLabel_en-US" xlink:label="lab_mdca_IncomeLossFromContinuingOperationsBeforeEquityInEarningsOfNonconsolidatedAffiliates_4F531F76F5A3C22E562CC0112523CF88" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Income before equity in earnings (losses) of non-consolidated affiliates</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_IncomeLossFromContinuingOperationsBeforeEquityInEarningsOfNonconsolidatedAffiliates" xlink:label="loc_mdca_IncomeLossFromContinuingOperationsBeforeEquityInEarningsOfNonconsolidatedAffiliates_4F531F76F5A3C22E562CC0112523CF88" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_IncomeLossFromContinuingOperationsBeforeEquityInEarningsOfNonconsolidatedAffiliates_4F531F76F5A3C22E562CC0112523CF88" xlink:to="lab_mdca_IncomeLossFromContinuingOperationsBeforeEquityInEarningsOfNonconsolidatedAffiliates_4F531F76F5A3C22E562CC0112523CF88" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeLossFromEquityMethodInvestments_58805FE84D0F57AC55E2C0112523F4CD_verboseLabel_en-US" xlink:label="lab_us-gaap_IncomeLossFromEquityMethodInvestments_58805FE84D0F57AC55E2C0112523F4CD" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Equity in earnings (losses) of non-consolidated affiliates</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_58805FE84D0F57AC55E2C0112523F4CD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeLossFromEquityMethodInvestments_58805FE84D0F57AC55E2C0112523F4CD" xlink:to="lab_us-gaap_IncomeLossFromEquityMethodInvestments_58805FE84D0F57AC55E2C0112523F4CD" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProfitLoss_C552164C5A0A3CAE7259C01125240783_totalLabel_en-US" xlink:label="lab_us-gaap_ProfitLoss_C552164C5A0A3CAE7259C01125240783" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net income (loss)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_C552164C5A0A3CAE7259C01125240783" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProfitLoss_C552164C5A0A3CAE7259C01125240783" xlink:to="lab_us-gaap_ProfitLoss_C552164C5A0A3CAE7259C01125240783" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_2D9E1A602FA4E7A0C3D0C0112524A1C3_negatedLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_2D9E1A602FA4E7A0C3D0C0112524A1C3" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Net income attributable to the noncontrolling interest</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_2D9E1A602FA4E7A0C3D0C0112524A1C3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_2D9E1A602FA4E7A0C3D0C0112524A1C3" xlink:to="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_2D9E1A602FA4E7A0C3D0C0112524A1C3" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetIncomeLoss_383FBC8332431587D24EC0112524A95E_totalLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLoss_383FBC8332431587D24EC0112524A95E" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net income (loss) attributable to MDC Partners Inc.</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_383FBC8332431587D24EC0112524A95E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetIncomeLoss_383FBC8332431587D24EC0112524A95E" xlink:to="lab_us-gaap_NetIncomeLoss_383FBC8332431587D24EC0112524A95E" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeLossFromContinuingOperations_A71E3A3A1F0F93151D00C01125245A02_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperations_A71E3A3A1F0F93151D00C01125245A02" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net income (loss) attributable to MDC Partners Inc. common shareholders</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeLossFromContinuingOperations" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperations_A71E3A3A1F0F93151D00C01125245A02" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperations_A71E3A3A1F0F93151D00C01125245A02" xlink:to="lab_us-gaap_IncomeLossFromContinuingOperations_A71E3A3A1F0F93151D00C01125245A02" xlink:type="arc" />
    <link:label id="lab_us-gaap_EarningsPerShareAbstract_9226E5D062061A8ADB7AC0112524DF47_verboseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareAbstract_9226E5D062061A8ADB7AC0112524DF47" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Income (loss) Per Common Share:</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="loc_us-gaap_EarningsPerShareAbstract_9226E5D062061A8ADB7AC0112524DF47" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerShareAbstract_9226E5D062061A8ADB7AC0112524DF47" xlink:to="lab_us-gaap_EarningsPerShareAbstract_9226E5D062061A8ADB7AC0112524DF47" xlink:type="arc" />
    <link:label id="lab_us-gaap_EarningsPerShareBasicAndDilutedAbstract_CAC14A1725FF2660517EC0112524EAE9_verboseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasicAndDilutedAbstract_CAC14A1725FF2660517EC0112524EAE9" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Basic and diluted</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareBasicAndDilutedAbstract_CAC14A1725FF2660517EC0112524EAE9_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasicAndDilutedAbstract_CAC14A1725FF2660517EC0112524EAE9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Earnings Per Share, Basic and Diluted [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareBasicAndDilutedAbstract" xlink:label="loc_us-gaap_EarningsPerShareBasicAndDilutedAbstract_CAC14A1725FF2660517EC0112524EAE9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerShareBasicAndDilutedAbstract_CAC14A1725FF2660517EC0112524EAE9" xlink:to="lab_us-gaap_EarningsPerShareBasicAndDilutedAbstract_CAC14A1725FF2660517EC0112524EAE9" xlink:type="arc" />
    <link:label id="lab_mdca_WeightedAverageNumberOfSharesOutstandingForBasicAndDilutedAbstract_C3711A810C74B2488A93C0112525BF52_terseLabel_en-US" xlink:label="lab_mdca_WeightedAverageNumberOfSharesOutstandingForBasicAndDilutedAbstract_C3711A810C74B2488A93C0112525BF52" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Weighted Average Number of Common Shares Outstanding:</link:label>
    <link:label id="lab_mdca_WeightedAverageNumberOfSharesOutstandingForBasicAndDilutedAbstract_C3711A810C74B2488A93C0112525BF52_label_en-US" xlink:label="lab_mdca_WeightedAverageNumberOfSharesOutstandingForBasicAndDilutedAbstract_C3711A810C74B2488A93C0112525BF52" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Weighted Average Number Of Shares Outstanding For Basic and Diluted [Abstract]</link:label>
    <link:label id="lab_mdca_WeightedAverageNumberOfSharesOutstandingForBasicAndDilutedAbstract_C3711A810C74B2488A93C0112525BF52_documentation_en-US" xlink:label="lab_mdca_WeightedAverageNumberOfSharesOutstandingForBasicAndDilutedAbstract_C3711A810C74B2488A93C0112525BF52" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US" />
    <link:loc xlink:href="mdca-20200630.xsd#mdca_WeightedAverageNumberOfSharesOutstandingForBasicAndDilutedAbstract" xlink:label="loc_mdca_WeightedAverageNumberOfSharesOutstandingForBasicAndDilutedAbstract_C3711A810C74B2488A93C0112525BF52" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_WeightedAverageNumberOfSharesOutstandingForBasicAndDilutedAbstract_C3711A810C74B2488A93C0112525BF52" xlink:to="lab_mdca_WeightedAverageNumberOfSharesOutstandingForBasicAndDilutedAbstract_C3711A810C74B2488A93C0112525BF52" xlink:type="arc" />
    <link:label id="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_F97859E3B5D7E5C52B19C0112525820F_terseLabel_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_F97859E3B5D7E5C52B19C0112525820F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Weighted Average Number of Shares Outstanding, Basic</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_F97859E3B5D7E5C52B19C0112525820F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_F97859E3B5D7E5C52B19C0112525820F" xlink:to="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_F97859E3B5D7E5C52B19C0112525820F" xlink:type="arc" />
    <link:label id="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_DC8A8ADC8AE46B9D166CC01125262040_terseLabel_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_DC8A8ADC8AE46B9D166CC01125262040" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Weighted Average Number of Shares Outstanding, Diluted</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_DC8A8ADC8AE46B9D166CC01125262040" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_DC8A8ADC8AE46B9D166CC01125262040" xlink:to="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_DC8A8ADC8AE46B9D166CC01125262040" xlink:type="arc" />
    <link:label id="lab_srt_StatementScenarioAxis_478951D9DC01C53A23E5C01124025687_terseLabel_en-US" xlink:label="lab_srt_StatementScenarioAxis_478951D9DC01C53A23E5C01124025687" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Scenario [Axis]</link:label>
    <link:label id="lab_srt_StatementScenarioAxis_478951D9DC01C53A23E5C01124025687_label_en-US" xlink:label="lab_srt_StatementScenarioAxis_478951D9DC01C53A23E5C01124025687" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Scenario [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_StatementScenarioAxis" xlink:label="loc_srt_StatementScenarioAxis_478951D9DC01C53A23E5C01124025687" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_StatementScenarioAxis_478951D9DC01C53A23E5C01124025687" xlink:to="lab_srt_StatementScenarioAxis_478951D9DC01C53A23E5C01124025687" xlink:type="arc" />
    <link:label id="lab_srt_ScenarioUnspecifiedDomain_A31D5494C5283BB5D12DC0112402FA41_terseLabel_en-US" xlink:label="lab_srt_ScenarioUnspecifiedDomain_A31D5494C5283BB5D12DC0112402FA41" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Scenario [Domain]</link:label>
    <link:label id="lab_srt_ScenarioUnspecifiedDomain_A31D5494C5283BB5D12DC0112402FA41_label_en-US" xlink:label="lab_srt_ScenarioUnspecifiedDomain_A31D5494C5283BB5D12DC0112402FA41" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Scenario [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ScenarioUnspecifiedDomain" xlink:label="loc_srt_ScenarioUnspecifiedDomain_A31D5494C5283BB5D12DC0112402FA41" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ScenarioUnspecifiedDomain_A31D5494C5283BB5D12DC0112402FA41" xlink:to="lab_srt_ScenarioUnspecifiedDomain_A31D5494C5283BB5D12DC0112402FA41" xlink:type="arc" />
    <link:label id="lab_srt_ScenarioForecastMember_95B4DC3EEBE127148429C01124035578_terseLabel_en-US" xlink:label="lab_srt_ScenarioForecastMember_95B4DC3EEBE127148429C01124035578" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Forecast</link:label>
    <link:label id="lab_srt_ScenarioForecastMember_95B4DC3EEBE127148429C01124035578_label_en-US" xlink:label="lab_srt_ScenarioForecastMember_95B4DC3EEBE127148429C01124035578" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Forecast [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ScenarioForecastMember" xlink:label="loc_srt_ScenarioForecastMember_95B4DC3EEBE127148429C01124035578" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ScenarioForecastMember_95B4DC3EEBE127148429C01124035578" xlink:to="lab_srt_ScenarioForecastMember_95B4DC3EEBE127148429C01124035578" xlink:type="arc" />
    <link:label id="lab_us-gaap_LineOfCreditMember_C3B80DE68177E46F3DCEC011240436F5_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditMember_C3B80DE68177E46F3DCEC011240436F5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Line of Credit [Member]</link:label>
    <link:label id="lab_us-gaap_LineOfCreditMember_C3B80DE68177E46F3DCEC011240436F5_label_en-US" xlink:label="lab_us-gaap_LineOfCreditMember_C3B80DE68177E46F3DCEC011240436F5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditMember" xlink:label="loc_us-gaap_LineOfCreditMember_C3B80DE68177E46F3DCEC011240436F5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditMember_C3B80DE68177E46F3DCEC011240436F5" xlink:to="lab_us-gaap_LineOfCreditMember_C3B80DE68177E46F3DCEC011240436F5" xlink:type="arc" />
    <link:label id="lab_mdca_AmendmentCreditAgreementMember_3F8F4B6EF3D057DFBF63C0112405DADC_terseLabel_en-US" xlink:label="lab_mdca_AmendmentCreditAgreementMember_3F8F4B6EF3D057DFBF63C0112405DADC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amendment, Credit Agreement [Member]</link:label>
    <link:label id="lab_mdca_AmendmentCreditAgreementMember_3F8F4B6EF3D057DFBF63C0112405DADC_label_en-US" xlink:label="lab_mdca_AmendmentCreditAgreementMember_3F8F4B6EF3D057DFBF63C0112405DADC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Amendment, Credit Agreement [Member]</link:label>
    <link:label id="lab_mdca_AmendmentCreditAgreementMember_3F8F4B6EF3D057DFBF63C0112405DADC_documentation_en-US" xlink:label="lab_mdca_AmendmentCreditAgreementMember_3F8F4B6EF3D057DFBF63C0112405DADC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amendment, Credit Agreement [Member]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_AmendmentCreditAgreementMember" xlink:label="loc_mdca_AmendmentCreditAgreementMember_3F8F4B6EF3D057DFBF63C0112405DADC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_AmendmentCreditAgreementMember_3F8F4B6EF3D057DFBF63C0112405DADC" xlink:to="lab_mdca_AmendmentCreditAgreementMember_3F8F4B6EF3D057DFBF63C0112405DADC" xlink:type="arc" />
    <link:label id="lab_us-gaap_RevolvingCreditFacilityMember_C5A56823956ED14A0601C011240523EA_verboseLabel_en-US" xlink:label="lab_us-gaap_RevolvingCreditFacilityMember_C5A56823956ED14A0601C011240523EA" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Revolving Credit Facility [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevolvingCreditFacilityMember" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_C5A56823956ED14A0601C011240523EA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevolvingCreditFacilityMember_C5A56823956ED14A0601C011240523EA" xlink:to="lab_us-gaap_RevolvingCreditFacilityMember_C5A56823956ED14A0601C011240523EA" xlink:type="arc" />
    <link:label id="lab_us-gaap_VariableRateAxis_F06271E9FD82FB88039AC01124069FD0_terseLabel_en-US" xlink:label="lab_us-gaap_VariableRateAxis_F06271E9FD82FB88039AC01124069FD0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Variable Rate [Axis]</link:label>
    <link:label id="lab_us-gaap_VariableRateAxis_F06271E9FD82FB88039AC01124069FD0_label_en-US" xlink:label="lab_us-gaap_VariableRateAxis_F06271E9FD82FB88039AC01124069FD0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Variable Rate [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VariableRateAxis" xlink:label="loc_us-gaap_VariableRateAxis_F06271E9FD82FB88039AC01124069FD0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_VariableRateAxis_F06271E9FD82FB88039AC01124069FD0" xlink:to="lab_us-gaap_VariableRateAxis_F06271E9FD82FB88039AC01124069FD0" xlink:type="arc" />
    <link:label id="lab_us-gaap_VariableRateDomain_6BD56CA272784A5D9199C01124063287_terseLabel_en-US" xlink:label="lab_us-gaap_VariableRateDomain_6BD56CA272784A5D9199C01124063287" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Variable Rate [Domain]</link:label>
    <link:label id="lab_us-gaap_VariableRateDomain_6BD56CA272784A5D9199C01124063287_label_en-US" xlink:label="lab_us-gaap_VariableRateDomain_6BD56CA272784A5D9199C01124063287" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Variable Rate [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VariableRateDomain" xlink:label="loc_us-gaap_VariableRateDomain_6BD56CA272784A5D9199C01124063287" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_VariableRateDomain_6BD56CA272784A5D9199C01124063287" xlink:to="lab_us-gaap_VariableRateDomain_6BD56CA272784A5D9199C01124063287" xlink:type="arc" />
    <link:label id="lab_us-gaap_BaseRateMember_7D098350A5D4932AE1EBC0112406C593_terseLabel_en-US" xlink:label="lab_us-gaap_BaseRateMember_7D098350A5D4932AE1EBC0112406C593" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Base Rate</link:label>
    <link:label id="lab_us-gaap_BaseRateMember_7D098350A5D4932AE1EBC0112406C593_label_en-US" xlink:label="lab_us-gaap_BaseRateMember_7D098350A5D4932AE1EBC0112406C593" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Base Rate [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BaseRateMember" xlink:label="loc_us-gaap_BaseRateMember_7D098350A5D4932AE1EBC0112406C593" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BaseRateMember_7D098350A5D4932AE1EBC0112406C593" xlink:to="lab_us-gaap_BaseRateMember_7D098350A5D4932AE1EBC0112406C593" xlink:type="arc" />
    <link:label id="lab_mdca_NonPrimeRateandPrimeRateonEuropeanAdvancesMember_DAA50FBC6358D8B729EFC01124065619_terseLabel_en-US" xlink:label="lab_mdca_NonPrimeRateandPrimeRateonEuropeanAdvancesMember_DAA50FBC6358D8B729EFC01124065619" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-Prime Rate and Prime Rate on European Advances</link:label>
    <link:label id="lab_mdca_NonPrimeRateandPrimeRateonEuropeanAdvancesMember_DAA50FBC6358D8B729EFC01124065619_label_en-US" xlink:label="lab_mdca_NonPrimeRateandPrimeRateonEuropeanAdvancesMember_DAA50FBC6358D8B729EFC01124065619" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-Prime Rate and Prime Rate on European Advances [Member]</link:label>
    <link:label id="lab_mdca_NonPrimeRateandPrimeRateonEuropeanAdvancesMember_DAA50FBC6358D8B729EFC01124065619_documentation_en-US" xlink:label="lab_mdca_NonPrimeRateandPrimeRateonEuropeanAdvancesMember_DAA50FBC6358D8B729EFC01124065619" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Non-Prime Rate and Prime Rate on European Advances [Member]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_NonPrimeRateandPrimeRateonEuropeanAdvancesMember" xlink:label="loc_mdca_NonPrimeRateandPrimeRateonEuropeanAdvancesMember_DAA50FBC6358D8B729EFC01124065619" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_NonPrimeRateandPrimeRateonEuropeanAdvancesMember_DAA50FBC6358D8B729EFC01124065619" xlink:to="lab_mdca_NonPrimeRateandPrimeRateonEuropeanAdvancesMember_DAA50FBC6358D8B729EFC01124065619" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentMaturityDate_2D6EA60E4FD779F0B4D9C0112407527F_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentMaturityDate_2D6EA60E4FD779F0B4D9C0112407527F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt instrument, maturity date</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentMaturityDate_2D6EA60E4FD779F0B4D9C0112407527F_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentMaturityDate_2D6EA60E4FD779F0B4D9C0112407527F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Maturity Date</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentMaturityDate" xlink:label="loc_us-gaap_DebtInstrumentMaturityDate_2D6EA60E4FD779F0B4D9C0112407527F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentMaturityDate_2D6EA60E4FD779F0B4D9C0112407527F" xlink:to="lab_us-gaap_DebtInstrumentMaturityDate_2D6EA60E4FD779F0B4D9C0112407527F" xlink:type="arc" />
    <link:label id="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceChangeInOwnershipControl_9D58E9CA54F9C2509206C0112408C03C_terseLabel_en-US" xlink:label="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceChangeInOwnershipControl_9D58E9CA54F9C2509206C0112408C03C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Percentage of redemption price, change in ownership controllatest for redemption at face amount</link:label>
    <link:label id="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceChangeInOwnershipControl_9D58E9CA54F9C2509206C0112408C03C_label_en-US" xlink:label="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceChangeInOwnershipControl_9D58E9CA54F9C2509206C0112408C03C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Percentage Of Redemption Price, Change In Ownership Control</link:label>
    <link:label id="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceChangeInOwnershipControl_9D58E9CA54F9C2509206C0112408C03C_documentation_en-US" xlink:label="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceChangeInOwnershipControl_9D58E9CA54F9C2509206C0112408C03C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The percentage of the face amount of the debt instrument applicable to the change in ownership.</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_DebtInstrumentPercentageOfRedemptionPriceChangeInOwnershipControl" xlink:label="loc_mdca_DebtInstrumentPercentageOfRedemptionPriceChangeInOwnershipControl_9D58E9CA54F9C2509206C0112408C03C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_DebtInstrumentPercentageOfRedemptionPriceChangeInOwnershipControl_9D58E9CA54F9C2509206C0112408C03C" xlink:to="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceChangeInOwnershipControl_9D58E9CA54F9C2509206C0112408C03C" xlink:type="arc" />
    <link:label id="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateLatestForRedemptionAtFaceAmount_6A5F1E105F4D1D50E7FDC0112408997A_terseLabel_en-US" xlink:label="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateLatestForRedemptionAtFaceAmount_6A5F1E105F4D1D50E7FDC0112408997A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Percentage of redemption price, redemption date, latest for redemption at face amounttion Price, Redemption Date, Latest For Redemption At Face Amount</link:label>
    <link:label id="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateLatestForRedemptionAtFaceAmount_6A5F1E105F4D1D50E7FDC0112408997A_label_en-US" xlink:label="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateLatestForRedemptionAtFaceAmount_6A5F1E105F4D1D50E7FDC0112408997A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Percentage Of Redemption Price, Redemption Date, Latest For Redemption At Face Amount</link:label>
    <link:label id="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateLatestForRedemptionAtFaceAmount_6A5F1E105F4D1D50E7FDC0112408997A_documentation_en-US" xlink:label="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateLatestForRedemptionAtFaceAmount_6A5F1E105F4D1D50E7FDC0112408997A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Debt instrument, percentage of redemption price, redemption date, latest for redemption at face amount</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateLatestForRedemptionAtFaceAmount" xlink:label="loc_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateLatestForRedemptionAtFaceAmount_6A5F1E105F4D1D50E7FDC0112408997A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateLatestForRedemptionAtFaceAmount_6A5F1E105F4D1D50E7FDC0112408997A" xlink:to="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateLatestForRedemptionAtFaceAmount_6A5F1E105F4D1D50E7FDC0112408997A" xlink:type="arc" />
    <link:label id="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_EB40B96A9F3416B7B4EBC01124084D51_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_EB40B96A9F3416B7B4EBC01124084D51" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Maximum borrowing capacity</link:label>
    <link:label id="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_EB40B96A9F3416B7B4EBC01124084D51_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_EB40B96A9F3416B7B4EBC01124084D51" 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>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_EB40B96A9F3416B7B4EBC01124084D51" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_EB40B96A9F3416B7B4EBC01124084D51" xlink:to="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_EB40B96A9F3416B7B4EBC01124084D51" xlink:type="arc" />
    <link:label id="lab_us-gaap_RatioOfIndebtednessToNetCapital1_1010F3B472B1C79A37A8C0112409FCAB_terseLabel_en-US" xlink:label="lab_us-gaap_RatioOfIndebtednessToNetCapital1_1010F3B472B1C79A37A8C0112409FCAB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ratio of Indebtedness to Net Capital</link:label>
    <link:label id="lab_us-gaap_RatioOfIndebtednessToNetCapital1_1010F3B472B1C79A37A8C0112409FCAB_label_en-US" xlink:label="lab_us-gaap_RatioOfIndebtednessToNetCapital1_1010F3B472B1C79A37A8C0112409FCAB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ratio of Indebtedness to Net Capital</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RatioOfIndebtednessToNetCapital1" xlink:label="loc_us-gaap_RatioOfIndebtednessToNetCapital1_1010F3B472B1C79A37A8C0112409FCAB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RatioOfIndebtednessToNetCapital1_1010F3B472B1C79A37A8C0112409FCAB" xlink:to="lab_us-gaap_RatioOfIndebtednessToNetCapital1_1010F3B472B1C79A37A8C0112409FCAB" xlink:type="arc" />
    <link:label id="lab_us-gaap_LongTermLineOfCredit_DAC45F59B68E3C07B47DC0112409F982_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermLineOfCredit_DAC45F59B68E3C07B47DC0112409F982" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amount outstanding under the line of credit</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermLineOfCredit" xlink:label="loc_us-gaap_LongTermLineOfCredit_DAC45F59B68E3C07B47DC0112409F982" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermLineOfCredit_DAC45F59B68E3C07B47DC0112409F982" xlink:to="lab_us-gaap_LongTermLineOfCredit_DAC45F59B68E3C07B47DC0112409F982" xlink:type="arc" />
    <link:label id="lab_us-gaap_LettersOfCreditOutstandingAmount_34E41BBE89B219446777C01124090021_verboseLabel_en-US" xlink:label="lab_us-gaap_LettersOfCreditOutstandingAmount_34E41BBE89B219446777C01124090021" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Amount of letters of credit outstanding</link:label>
    <link:label id="lab_us-gaap_LettersOfCreditOutstandingAmount_34E41BBE89B219446777C01124090021_label_en-US" xlink:label="lab_us-gaap_LettersOfCreditOutstandingAmount_34E41BBE89B219446777C01124090021" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Letters of Credit Outstanding, Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LettersOfCreditOutstandingAmount" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_34E41BBE89B219446777C01124090021" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LettersOfCreditOutstandingAmount_34E41BBE89B219446777C01124090021" xlink:to="lab_us-gaap_LettersOfCreditOutstandingAmount_34E41BBE89B219446777C01124090021" xlink:type="arc" />
    <link:label id="lab_srt_OwnershipAxis_C8BCAC3AE9007E02EAC8C01123F490FE_terseLabel_en-US" xlink:label="lab_srt_OwnershipAxis_C8BCAC3AE9007E02EAC8C01123F490FE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ownership [Axis]</link:label>
    <link:label id="lab_srt_OwnershipAxis_C8BCAC3AE9007E02EAC8C01123F490FE_label_en-US" xlink:label="lab_srt_OwnershipAxis_C8BCAC3AE9007E02EAC8C01123F490FE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ownership [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_OwnershipAxis" xlink:label="loc_srt_OwnershipAxis_C8BCAC3AE9007E02EAC8C01123F490FE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_OwnershipAxis_C8BCAC3AE9007E02EAC8C01123F490FE" xlink:to="lab_srt_OwnershipAxis_C8BCAC3AE9007E02EAC8C01123F490FE" xlink:type="arc" />
    <link:label id="lab_srt_OwnershipDomain_D01D7D3D1C68FD72B046C01123F401DE_terseLabel_en-US" xlink:label="lab_srt_OwnershipDomain_D01D7D3D1C68FD72B046C01123F401DE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Ownership [Domain]</link:label>
    <link:label id="lab_srt_OwnershipDomain_D01D7D3D1C68FD72B046C01123F401DE_label_en-US" xlink:label="lab_srt_OwnershipDomain_D01D7D3D1C68FD72B046C01123F401DE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ownership [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_OwnershipDomain" xlink:label="loc_srt_OwnershipDomain_D01D7D3D1C68FD72B046C01123F401DE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_OwnershipDomain_D01D7D3D1C68FD72B046C01123F401DE" xlink:to="lab_srt_OwnershipDomain_D01D7D3D1C68FD72B046C01123F401DE" xlink:type="arc" />
    <link:label id="lab_mdca_TheCompanyMember_D4F56EB79CB4E2756A9BC01123F4B769_terseLabel_en-US" xlink:label="lab_mdca_TheCompanyMember_D4F56EB79CB4E2756A9BC01123F4B769" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">MDC PARTNERS [Member]</link:label>
    <link:label id="lab_mdca_TheCompanyMember_D4F56EB79CB4E2756A9BC01123F4B769_label_en-US" xlink:label="lab_mdca_TheCompanyMember_D4F56EB79CB4E2756A9BC01123F4B769" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">The Company [Member]</link:label>
    <link:label id="lab_mdca_TheCompanyMember_D4F56EB79CB4E2756A9BC01123F4B769_documentation_en-US" xlink:label="lab_mdca_TheCompanyMember_D4F56EB79CB4E2756A9BC01123F4B769" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The Company [Member]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_TheCompanyMember" xlink:label="loc_mdca_TheCompanyMember_D4F56EB79CB4E2756A9BC01123F4B769" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_TheCompanyMember_D4F56EB79CB4E2756A9BC01123F4B769" xlink:to="lab_mdca_TheCompanyMember_D4F56EB79CB4E2756A9BC01123F4B769" xlink:type="arc" />
    <link:label id="lab_us-gaap_VestingAxis_9DFB984065725EA31018C01123F4CCBB_terseLabel_en-US" xlink:label="lab_us-gaap_VestingAxis_9DFB984065725EA31018C01123F4CCBB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Vesting [Axis]</link:label>
    <link:label id="lab_us-gaap_VestingAxis_9DFB984065725EA31018C01123F4CCBB_label_en-US" xlink:label="lab_us-gaap_VestingAxis_9DFB984065725EA31018C01123F4CCBB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Vesting [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VestingAxis" xlink:label="loc_us-gaap_VestingAxis_9DFB984065725EA31018C01123F4CCBB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_VestingAxis_9DFB984065725EA31018C01123F4CCBB" xlink:to="lab_us-gaap_VestingAxis_9DFB984065725EA31018C01123F4CCBB" xlink:type="arc" />
    <link:label id="lab_us-gaap_VestingDomain_5C47D1353B3A2065A862C01123F5EF8A_terseLabel_en-US" xlink:label="lab_us-gaap_VestingDomain_5C47D1353B3A2065A862C01123F5EF8A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Vesting [Domain]</link:label>
    <link:label id="lab_us-gaap_VestingDomain_5C47D1353B3A2065A862C01123F5EF8A_label_en-US" xlink:label="lab_us-gaap_VestingDomain_5C47D1353B3A2065A862C01123F5EF8A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Vesting [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VestingDomain" xlink:label="loc_us-gaap_VestingDomain_5C47D1353B3A2065A862C01123F5EF8A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_VestingDomain_5C47D1353B3A2065A862C01123F5EF8A" xlink:to="lab_us-gaap_VestingDomain_5C47D1353B3A2065A862C01123F5EF8A" xlink:type="arc" />
    <link:label id="lab_mdca_VestingoverperiodMember_092EB35537DE9C64E5CBC01123F58E20_terseLabel_en-US" xlink:label="lab_mdca_VestingoverperiodMember_092EB35537DE9C64E5CBC01123F58E20" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Vesting over period [Member]</link:label>
    <link:label id="lab_mdca_VestingoverperiodMember_092EB35537DE9C64E5CBC01123F58E20_label_en-US" xlink:label="lab_mdca_VestingoverperiodMember_092EB35537DE9C64E5CBC01123F58E20" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Vesting over period [Member]</link:label>
    <link:label id="lab_mdca_VestingoverperiodMember_092EB35537DE9C64E5CBC01123F58E20_documentation_en-US" xlink:label="lab_mdca_VestingoverperiodMember_092EB35537DE9C64E5CBC01123F58E20" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Vesting over period [Member]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_VestingoverperiodMember" xlink:label="loc_mdca_VestingoverperiodMember_092EB35537DE9C64E5CBC01123F58E20" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_VestingoverperiodMember_092EB35537DE9C64E5CBC01123F58E20" xlink:to="lab_mdca_VestingoverperiodMember_092EB35537DE9C64E5CBC01123F58E20" xlink:type="arc" />
    <link:label id="lab_mdca_TerminationdisabilityordeathMember_898882F01D09E0BAF383C01123F5ED68_terseLabel_en-US" xlink:label="lab_mdca_TerminationdisabilityordeathMember_898882F01D09E0BAF383C01123F5ED68" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Termination, disability, or death [Member]</link:label>
    <link:label id="lab_mdca_TerminationdisabilityordeathMember_898882F01D09E0BAF383C01123F5ED68_label_en-US" xlink:label="lab_mdca_TerminationdisabilityordeathMember_898882F01D09E0BAF383C01123F5ED68" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Termination, disability, or death [Member]</link:label>
    <link:label id="lab_mdca_TerminationdisabilityordeathMember_898882F01D09E0BAF383C01123F5ED68_documentation_en-US" xlink:label="lab_mdca_TerminationdisabilityordeathMember_898882F01D09E0BAF383C01123F5ED68" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Termination, disability, or death [Member]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_TerminationdisabilityordeathMember" xlink:label="loc_mdca_TerminationdisabilityordeathMember_898882F01D09E0BAF383C01123F5ED68" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_TerminationdisabilityordeathMember_898882F01D09E0BAF383C01123F5ED68" xlink:to="lab_mdca_TerminationdisabilityordeathMember_898882F01D09E0BAF383C01123F5ED68" xlink:type="arc" />
    <link:label id="lab_mdca_AcquisitionValueinexcessofRedemptionValueMember_1B423560806EBBD6ED95C01123F59CE4_terseLabel_en-US" xlink:label="lab_mdca_AcquisitionValueinexcessofRedemptionValueMember_1B423560806EBBD6ED95C01123F59CE4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Acquisition Value in excess of Redemption Value [Member]</link:label>
    <link:label id="lab_mdca_AcquisitionValueinexcessofRedemptionValueMember_1B423560806EBBD6ED95C01123F59CE4_label_en-US" xlink:label="lab_mdca_AcquisitionValueinexcessofRedemptionValueMember_1B423560806EBBD6ED95C01123F59CE4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Acquisition Value in excess of Redemption Value [Member]</link:label>
    <link:label id="lab_mdca_AcquisitionValueinexcessofRedemptionValueMember_1B423560806EBBD6ED95C01123F59CE4_documentation_en-US" xlink:label="lab_mdca_AcquisitionValueinexcessofRedemptionValueMember_1B423560806EBBD6ED95C01123F59CE4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Acquisition Value in excess of Redemption Value [Member]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_AcquisitionValueinexcessofRedemptionValueMember" xlink:label="loc_mdca_AcquisitionValueinexcessofRedemptionValueMember_1B423560806EBBD6ED95C01123F59CE4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_AcquisitionValueinexcessofRedemptionValueMember_1B423560806EBBD6ED95C01123F59CE4" xlink:to="lab_mdca_AcquisitionValueinexcessofRedemptionValueMember_1B423560806EBBD6ED95C01123F59CE4" xlink:type="arc" />
    <link:label id="lab_us-gaap_MinorityInterestOwnershipPercentageByParent_9A5B406E6CD836F2EDCAC01123F6F5A0_terseLabel_en-US" xlink:label="lab_us-gaap_MinorityInterestOwnershipPercentageByParent_9A5B406E6CD836F2EDCAC01123F6F5A0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Noncontrolling interest, ownership percentage by Parent (percent)</link:label>
    <link:label id="lab_us-gaap_MinorityInterestOwnershipPercentageByParent_9A5B406E6CD836F2EDCAC01123F6F5A0_label_en-US" xlink:label="lab_us-gaap_MinorityInterestOwnershipPercentageByParent_9A5B406E6CD836F2EDCAC01123F6F5A0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Noncontrolling Interest, Ownership Percentage by Parent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MinorityInterestOwnershipPercentageByParent" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_9A5B406E6CD836F2EDCAC01123F6F5A0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_9A5B406E6CD836F2EDCAC01123F6F5A0" xlink:to="lab_us-gaap_MinorityInterestOwnershipPercentageByParent_9A5B406E6CD836F2EDCAC01123F6F5A0" xlink:type="arc" />
    <link:label id="lab_us-gaap_RedeemableNoncontrollingInterestEquityFairValue_F3CBB81CCE269ECCA69DC01123F6E60C_terseLabel_en-US" xlink:label="lab_us-gaap_RedeemableNoncontrollingInterestEquityFairValue_F3CBB81CCE269ECCA69DC01123F6E60C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Redeemable Noncontrolling Interest, Equity, Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RedeemableNoncontrollingInterestEquityFairValue" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestEquityFairValue_F3CBB81CCE269ECCA69DC01123F6E60C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestEquityFairValue_F3CBB81CCE269ECCA69DC01123F6E60C" xlink:to="lab_us-gaap_RedeemableNoncontrollingInterestEquityFairValue_F3CBB81CCE269ECCA69DC01123F6E60C" xlink:type="arc" />
    <link:label id="lab_us-gaap_UnbilledContractsReceivable_C9D7FF5287D0DBE3EB51C0112456D69C_terseLabel_en-US" xlink:label="lab_us-gaap_UnbilledContractsReceivable_C9D7FF5287D0DBE3EB51C0112456D69C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unbilled service fees</link:label>
    <link:label id="lab_us-gaap_UnbilledContractsReceivable_C9D7FF5287D0DBE3EB51C0112456D69C_label_en-US" xlink:label="lab_us-gaap_UnbilledContractsReceivable_C9D7FF5287D0DBE3EB51C0112456D69C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unbilled Contracts Receivable</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnbilledContractsReceivable" xlink:label="loc_us-gaap_UnbilledContractsReceivable_C9D7FF5287D0DBE3EB51C0112456D69C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnbilledContractsReceivable_C9D7FF5287D0DBE3EB51C0112456D69C" xlink:to="lab_us-gaap_UnbilledContractsReceivable_C9D7FF5287D0DBE3EB51C0112456D69C" xlink:type="arc" />
    <link:label id="lab_mdca_ExpendituresBillableCurrent_6A5738DD22E234209A8CC0112456D9BB_terseLabel_en-US" xlink:label="lab_mdca_ExpendituresBillableCurrent_6A5738DD22E234209A8CC0112456D9BB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unbilled outside vendor costs, billable to clients</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_ExpendituresBillableCurrent" xlink:label="loc_mdca_ExpendituresBillableCurrent_6A5738DD22E234209A8CC0112456D9BB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_ExpendituresBillableCurrent_6A5738DD22E234209A8CC0112456D9BB" xlink:to="lab_mdca_ExpendituresBillableCurrent_6A5738DD22E234209A8CC0112456D9BB" xlink:type="arc" />
    <link:label id="lab_us-gaap_ContractWithCustomerLiability_917C39248A26FB6CC8C8C0112456DB44_verboseLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerLiability_917C39248A26FB6CC8C8C0112456DB44" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Advance billings</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ContractWithCustomerLiability" xlink:label="loc_us-gaap_ContractWithCustomerLiability_917C39248A26FB6CC8C8C0112456DB44" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractWithCustomerLiability_917C39248A26FB6CC8C8C0112456DB44" xlink:to="lab_us-gaap_ContractWithCustomerLiability_917C39248A26FB6CC8C8C0112456DB44" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredRevenueAdditions_CAAD33A16AE5B7A4F80FC0112456375F_negatedLabel_en-US" xlink:label="lab_us-gaap_DeferredRevenueAdditions_CAAD33A16AE5B7A4F80FC0112456375F" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Decrease in advance billings</link:label>
    <link:label id="lab_us-gaap_DeferredRevenueAdditions_CAAD33A16AE5B7A4F80FC0112456375F_label_en-US" xlink:label="lab_us-gaap_DeferredRevenueAdditions_CAAD33A16AE5B7A4F80FC0112456375F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Revenue, Additions</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredRevenueAdditions" xlink:label="loc_us-gaap_DeferredRevenueAdditions_CAAD33A16AE5B7A4F80FC0112456375F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredRevenueAdditions_CAAD33A16AE5B7A4F80FC0112456375F" xlink:to="lab_us-gaap_DeferredRevenueAdditions_CAAD33A16AE5B7A4F80FC0112456375F" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredRevenueRevenueRecognized1_D7D7526ADD1A4A744899C01124564D37_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredRevenueRevenueRecognized1_D7D7526ADD1A4A744899C01124564D37" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revenue recognized</link:label>
    <link:label id="lab_us-gaap_DeferredRevenueRevenueRecognized1_D7D7526ADD1A4A744899C01124564D37_label_en-US" xlink:label="lab_us-gaap_DeferredRevenueRevenueRecognized1_D7D7526ADD1A4A744899C01124564D37" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Revenue, Revenue Recognized</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredRevenueRevenueRecognized1" xlink:label="loc_us-gaap_DeferredRevenueRevenueRecognized1_D7D7526ADD1A4A744899C01124564D37" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredRevenueRevenueRecognized1_D7D7526ADD1A4A744899C01124564D37" xlink:to="lab_us-gaap_DeferredRevenueRevenueRecognized1_D7D7526ADD1A4A744899C01124564D37" xlink:type="arc" />
    <link:label id="lab_us-gaap_RevenueRemainingPerformanceObligation_BB66F4D55B8BF6ECE779C01124571B7B_terseLabel_en-US" xlink:label="lab_us-gaap_RevenueRemainingPerformanceObligation_BB66F4D55B8BF6ECE779C01124571B7B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Remaining performance obligation, amount</link:label>
    <link:label id="lab_us-gaap_RevenueRemainingPerformanceObligation_BB66F4D55B8BF6ECE779C01124571B7B_label_en-US" xlink:label="lab_us-gaap_RevenueRemainingPerformanceObligation_BB66F4D55B8BF6ECE779C01124571B7B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenue, Remaining Performance Obligation, Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligation" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_BB66F4D55B8BF6ECE779C01124571B7B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligation_BB66F4D55B8BF6ECE779C01124571B7B" xlink:to="lab_us-gaap_RevenueRemainingPerformanceObligation_BB66F4D55B8BF6ECE779C01124571B7B" xlink:type="arc" />
    <link:label id="lab_mdca_RevenueRemainingPerformanceObligationCurrentYearPercentage_1CC8536395F17094649AC01124575E1D_terseLabel_en-US" xlink:label="lab_mdca_RevenueRemainingPerformanceObligationCurrentYearPercentage_1CC8536395F17094649AC01124575E1D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Remaining performance obligation, current year, percentage</link:label>
    <link:label id="lab_mdca_RevenueRemainingPerformanceObligationCurrentYearPercentage_1CC8536395F17094649AC01124575E1D_label_en-US" xlink:label="lab_mdca_RevenueRemainingPerformanceObligationCurrentYearPercentage_1CC8536395F17094649AC01124575E1D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenue, Remaining Performance Obligation, Current Year, Percentage</link:label>
    <link:label id="lab_mdca_RevenueRemainingPerformanceObligationCurrentYearPercentage_1CC8536395F17094649AC01124575E1D_documentation_en-US" xlink:label="lab_mdca_RevenueRemainingPerformanceObligationCurrentYearPercentage_1CC8536395F17094649AC01124575E1D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Revenue, Remaining Performance Obligation, Current Year, Percentage</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_RevenueRemainingPerformanceObligationCurrentYearPercentage" xlink:label="loc_mdca_RevenueRemainingPerformanceObligationCurrentYearPercentage_1CC8536395F17094649AC01124575E1D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_RevenueRemainingPerformanceObligationCurrentYearPercentage_1CC8536395F17094649AC01124575E1D" xlink:to="lab_mdca_RevenueRemainingPerformanceObligationCurrentYearPercentage_1CC8536395F17094649AC01124575E1D" xlink:type="arc" />
    <link:label id="lab_mdca_RevenueRemainingPerformanceObligationYearTwoPercentage_740AC87EA86CFB0B8718C0112457AA6C_terseLabel_en-US" xlink:label="lab_mdca_RevenueRemainingPerformanceObligationYearTwoPercentage_740AC87EA86CFB0B8718C0112457AA6C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Remaining performance obligation, year two, percentage</link:label>
    <link:label id="lab_mdca_RevenueRemainingPerformanceObligationYearTwoPercentage_740AC87EA86CFB0B8718C0112457AA6C_label_en-US" xlink:label="lab_mdca_RevenueRemainingPerformanceObligationYearTwoPercentage_740AC87EA86CFB0B8718C0112457AA6C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenue, Remaining Performance Obligation, Year Two, Percentage</link:label>
    <link:label id="lab_mdca_RevenueRemainingPerformanceObligationYearTwoPercentage_740AC87EA86CFB0B8718C0112457AA6C_documentation_en-US" xlink:label="lab_mdca_RevenueRemainingPerformanceObligationYearTwoPercentage_740AC87EA86CFB0B8718C0112457AA6C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Revenue, Remaining Performance Obligation, Year Two, Percentage</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_RevenueRemainingPerformanceObligationYearTwoPercentage" xlink:label="loc_mdca_RevenueRemainingPerformanceObligationYearTwoPercentage_740AC87EA86CFB0B8718C0112457AA6C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_RevenueRemainingPerformanceObligationYearTwoPercentage_740AC87EA86CFB0B8718C0112457AA6C" xlink:to="lab_mdca_RevenueRemainingPerformanceObligationYearTwoPercentage_740AC87EA86CFB0B8718C0112457AA6C" xlink:type="arc" />
    <link:label id="lab_mdca_RevenueRemainingPerformanceObligationYearThreePercentage_18C7A7ED5A7EF58E9E0CC011245768C7_terseLabel_en-US" xlink:label="lab_mdca_RevenueRemainingPerformanceObligationYearThreePercentage_18C7A7ED5A7EF58E9E0CC011245768C7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Remaining performance obligation, year three, percentage</link:label>
    <link:label id="lab_mdca_RevenueRemainingPerformanceObligationYearThreePercentage_18C7A7ED5A7EF58E9E0CC011245768C7_label_en-US" xlink:label="lab_mdca_RevenueRemainingPerformanceObligationYearThreePercentage_18C7A7ED5A7EF58E9E0CC011245768C7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenue, Remaining Performance Obligation, Year Three, Percentage</link:label>
    <link:label id="lab_mdca_RevenueRemainingPerformanceObligationYearThreePercentage_18C7A7ED5A7EF58E9E0CC011245768C7_documentation_en-US" xlink:label="lab_mdca_RevenueRemainingPerformanceObligationYearThreePercentage_18C7A7ED5A7EF58E9E0CC011245768C7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Revenue, Remaining Performance Obligation, Year Three, Percentage</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_RevenueRemainingPerformanceObligationYearThreePercentage" xlink:label="loc_mdca_RevenueRemainingPerformanceObligationYearThreePercentage_18C7A7ED5A7EF58E9E0CC011245768C7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_RevenueRemainingPerformanceObligationYearThreePercentage_18C7A7ED5A7EF58E9E0CC011245768C7" xlink:to="lab_mdca_RevenueRemainingPerformanceObligationYearThreePercentage_18C7A7ED5A7EF58E9E0CC011245768C7" xlink:type="arc" />
    <link:label id="lab_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_CFA9EFB628975EFEC24FC01124F9DAC9_terseLabel_en-US" xlink:label="lab_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_CFA9EFB628975EFEC24FC01124F9DAC9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Allowance for doubtful accounts</link:label>
    <link:label id="lab_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_CFA9EFB628975EFEC24FC01124F9DAC9_label_en-US" xlink:label="lab_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_CFA9EFB628975EFEC24FC01124F9DAC9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accounts Receivable, Allowance for Credit Loss, Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_CFA9EFB628975EFEC24FC01124F9DAC9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_CFA9EFB628975EFEC24FC01124F9DAC9" xlink:to="lab_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_CFA9EFB628975EFEC24FC01124F9DAC9" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_8A79196B25518CEDEB16C01124F90C23_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_8A79196B25518CEDEB16C01124F90C23" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fixed assets, accumulated depreciation</link:label>
    <link:label id="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_8A79196B25518CEDEB16C01124F90C23_label_en-US" xlink:label="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_8A79196B25518CEDEB16C01124F90C23" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_8A79196B25518CEDEB16C01124F90C23" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_8A79196B25518CEDEB16C01124F90C23" xlink:to="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_8A79196B25518CEDEB16C01124F90C23" xlink:type="arc" />
    <link:label id="lab_us-gaap_PreferredStockSharesAuthorized_98F9E6526A3DFAB71271C01124F9DFAC_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockSharesAuthorized_98F9E6526A3DFAB71271C01124F9DFAC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Preference shares, authorized (in shares)</link:label>
    <link:label id="lab_us-gaap_PreferredStockSharesAuthorized_98F9E6526A3DFAB71271C01124F9DFAC_label_en-US" xlink:label="lab_us-gaap_PreferredStockSharesAuthorized_98F9E6526A3DFAB71271C01124F9DFAC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Preferred Stock, Shares Authorized</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockSharesAuthorized" xlink:label="loc_us-gaap_PreferredStockSharesAuthorized_98F9E6526A3DFAB71271C01124F9DFAC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PreferredStockSharesAuthorized_98F9E6526A3DFAB71271C01124F9DFAC" xlink:to="lab_us-gaap_PreferredStockSharesAuthorized_98F9E6526A3DFAB71271C01124F9DFAC" xlink:type="arc" />
    <link:label id="lab_us-gaap_PreferredStockSharesIssued_BC29C9C877B078411225C01124F94068_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockSharesIssued_BC29C9C877B078411225C01124F94068" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Preference shares, issued (in shares)</link:label>
    <link:label id="lab_us-gaap_PreferredStockSharesIssued_BC29C9C877B078411225C01124F94068_label_en-US" xlink:label="lab_us-gaap_PreferredStockSharesIssued_BC29C9C877B078411225C01124F94068" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Preferred Stock, Shares Issued</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockSharesIssued" xlink:label="loc_us-gaap_PreferredStockSharesIssued_BC29C9C877B078411225C01124F94068" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PreferredStockSharesIssued_BC29C9C877B078411225C01124F94068" xlink:to="lab_us-gaap_PreferredStockSharesIssued_BC29C9C877B078411225C01124F94068" xlink:type="arc" />
    <link:label id="lab_us-gaap_PreferredStockSharesOutstanding_8E968369A95645BB8162C01124F90EAA_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockSharesOutstanding_8E968369A95645BB8162C01124F90EAA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Preference shares, outstanding (in shares)</link:label>
    <link:label id="lab_us-gaap_PreferredStockSharesOutstanding_8E968369A95645BB8162C01124F90EAA_label_en-US" xlink:label="lab_us-gaap_PreferredStockSharesOutstanding_8E968369A95645BB8162C01124F90EAA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Preferred Stock, Shares Outstanding</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockSharesOutstanding" xlink:label="loc_us-gaap_PreferredStockSharesOutstanding_8E968369A95645BB8162C01124F90EAA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PreferredStockSharesOutstanding_8E968369A95645BB8162C01124F90EAA" xlink:to="lab_us-gaap_PreferredStockSharesOutstanding_8E968369A95645BB8162C01124F90EAA" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisTextBlock_4D79EEC13F04A48A0323C01123BECE86_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisTextBlock_4D79EEC13F04A48A0323C01123BECE86" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value of Financial Liability Measured on a Non-recurring Basis</link:label>
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisTextBlock_4D79EEC13F04A48A0323C01123BECE86_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisTextBlock_4D79EEC13F04A48A0323C01123BECE86" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Measurements, Nonrecurring [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisTextBlock" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisTextBlock_4D79EEC13F04A48A0323C01123BECE86" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisTextBlock_4D79EEC13F04A48A0323C01123BECE86" xlink:to="lab_us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisTextBlock_4D79EEC13F04A48A0323C01123BECE86" xlink:type="arc" />
    <link:label id="lab_us-gaap_LesseeOperatingLeasesTextBlock_5A36513F69051AB10AD2C011242AF4A1_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeasesTextBlock_5A36513F69051AB10AD2C011242AF4A1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Leases</link:label>
    <link:label id="lab_us-gaap_LesseeOperatingLeasesTextBlock_5A36513F69051AB10AD2C011242AF4A1_label_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeasesTextBlock_5A36513F69051AB10AD2C011242AF4A1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lessee, Operating Leases [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeasesTextBlock" xlink:label="loc_us-gaap_LesseeOperatingLeasesTextBlock_5A36513F69051AB10AD2C011242AF4A1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LesseeOperatingLeasesTextBlock_5A36513F69051AB10AD2C011242AF4A1" xlink:to="lab_us-gaap_LesseeOperatingLeasesTextBlock_5A36513F69051AB10AD2C011242AF4A1" xlink:type="arc" />
    <link:label id="lab_us-gaap_RelatedPartyTransactionsDisclosureTextBlock_38BE0973C45EF5FBB928C01123AC5376_terseLabel_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionsDisclosureTextBlock_38BE0973C45EF5FBB928C01123AC5376" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Related Party Transactions</link:label>
    <link:label id="lab_us-gaap_RelatedPartyTransactionsDisclosureTextBlock_38BE0973C45EF5FBB928C01123AC5376_label_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionsDisclosureTextBlock_38BE0973C45EF5FBB928C01123AC5376" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Related Party Transactions Disclosure [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyTransactionsDisclosureTextBlock" xlink:label="loc_us-gaap_RelatedPartyTransactionsDisclosureTextBlock_38BE0973C45EF5FBB928C01123AC5376" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RelatedPartyTransactionsDisclosureTextBlock_38BE0973C45EF5FBB928C01123AC5376" xlink:to="lab_us-gaap_RelatedPartyTransactionsDisclosureTextBlock_38BE0973C45EF5FBB928C01123AC5376" xlink:type="arc" />
    <link:label id="lab_mdca_ChangeInNoncontrollingInterestTableTextBlock_5C7A75620F1076F7B04BC01123F99E3E_terseLabel_en-US" xlink:label="lab_mdca_ChangeInNoncontrollingInterestTableTextBlock_5C7A75620F1076F7B04BC01123F99E3E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Change In Noncontrolling Interest [Table Text Block]</link:label>
    <link:label id="lab_mdca_ChangeInNoncontrollingInterestTableTextBlock_5C7A75620F1076F7B04BC01123F99E3E_label_en-US" xlink:label="lab_mdca_ChangeInNoncontrollingInterestTableTextBlock_5C7A75620F1076F7B04BC01123F99E3E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Change In Noncontrolling Interest [Table Text Block]</link:label>
    <link:label id="lab_mdca_ChangeInNoncontrollingInterestTableTextBlock_5C7A75620F1076F7B04BC01123F99E3E_documentation_en-US" xlink:label="lab_mdca_ChangeInNoncontrollingInterestTableTextBlock_5C7A75620F1076F7B04BC01123F99E3E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Change In Noncontrolling Interest [Table Text Block]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_ChangeInNoncontrollingInterestTableTextBlock" xlink:label="loc_mdca_ChangeInNoncontrollingInterestTableTextBlock_5C7A75620F1076F7B04BC01123F99E3E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_ChangeInNoncontrollingInterestTableTextBlock_5C7A75620F1076F7B04BC01123F99E3E" xlink:to="lab_mdca_ChangeInNoncontrollingInterestTableTextBlock_5C7A75620F1076F7B04BC01123F99E3E" xlink:type="arc" />
    <link:label id="lab_mdca_NoncontrollingInterestTableTextBlock_AFAD87B8F397302F63B1C01123F9355F_terseLabel_en-US" xlink:label="lab_mdca_NoncontrollingInterestTableTextBlock_AFAD87B8F397302F63B1C01123F9355F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Noncontrolling Interest [Table Text Block]</link:label>
    <link:label id="lab_mdca_NoncontrollingInterestTableTextBlock_AFAD87B8F397302F63B1C01123F9355F_label_en-US" xlink:label="lab_mdca_NoncontrollingInterestTableTextBlock_AFAD87B8F397302F63B1C01123F9355F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Noncontrolling Interest [Table Text Block]</link:label>
    <link:label id="lab_mdca_NoncontrollingInterestTableTextBlock_AFAD87B8F397302F63B1C01123F9355F_documentation_en-US" xlink:label="lab_mdca_NoncontrollingInterestTableTextBlock_AFAD87B8F397302F63B1C01123F9355F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Noncontrolling Interest [Table Text Block]</link:label>
    <link:loc xlink:href="mdca-20200630.xsd#mdca_NoncontrollingInterestTableTextBlock" xlink:label="loc_mdca_NoncontrollingInterestTableTextBlock_AFAD87B8F397302F63B1C01123F9355F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_NoncontrollingInterestTableTextBlock_AFAD87B8F397302F63B1C01123F9355F" xlink:to="lab_mdca_NoncontrollingInterestTableTextBlock_AFAD87B8F397302F63B1C01123F9355F" xlink:type="arc" />
    <link:label id="lab_us-gaap_RedeemableNoncontrollingInterestTableTextBlock_158FCD674BA5DC92198CC01123F952A4_terseLabel_en-US" xlink:label="lab_us-gaap_RedeemableNoncontrollingInterestTableTextBlock_158FCD674BA5DC92198CC01123F952A4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Redeemable Noncontrolling Interest [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_RedeemableNoncontrollingInterestTableTextBlock_158FCD674BA5DC92198CC01123F952A4_label_en-US" xlink:label="lab_us-gaap_RedeemableNoncontrollingInterestTableTextBlock_158FCD674BA5DC92198CC01123F952A4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Redeemable Noncontrolling Interest [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RedeemableNoncontrollingInterestTableTextBlock" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestTableTextBlock_158FCD674BA5DC92198CC01123F952A4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestTableTextBlock_158FCD674BA5DC92198CC01123F952A4" xlink:to="lab_us-gaap_RedeemableNoncontrollingInterestTableTextBlock_158FCD674BA5DC92198CC01123F952A4" xlink:type="arc" />
    <link:label id="lab_us-gaap_CostsAndExpenses_A7093F816737A5D3897FD41D572B8C51_terseLabel_en-US" xlink:label="lab_us-gaap_CostsAndExpenses_A7093F816737A5D3897FD41D572B8C51" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Costs and Expenses</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CostsAndExpenses" xlink:label="loc_us-gaap_CostsAndExpenses_A7093F816737A5D3897FD41D572B8C51" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CostsAndExpenses_A7093F816737A5D3897FD41D572B8C51" xlink:to="lab_us-gaap_CostsAndExpenses_A7093F816737A5D3897FD41D572B8C51" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_E226126759CEC54661B8D41DE4600940_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_E226126759CEC54661B8D41DE4600940" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_E226126759CEC54661B8D41DE4600940" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_E226126759CEC54661B8D41DE4600940" xlink:to="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_E226126759CEC54661B8D41DE4600940" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxExpenseBenefit_B05F73C14B4FA524D353D41E17BFC6E3_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefit_B05F73C14B4FA524D353D41E17BFC6E3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income Tax Expense (Benefit)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_B05F73C14B4FA524D353D41E17BFC6E3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_B05F73C14B4FA524D353D41E17BFC6E3" xlink:to="lab_us-gaap_IncomeTaxExpenseBenefit_B05F73C14B4FA524D353D41E17BFC6E3" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_33A326C04EE4C9AF64B9D41F7120877F_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_33A326C04EE4C9AF64B9D41F7120877F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income (Loss) from Continuing Operations, Per Basic Share</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsPerBasicShare" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_33A326C04EE4C9AF64B9D41F7120877F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_33A326C04EE4C9AF64B9D41F7120877F" xlink:to="lab_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_33A326C04EE4C9AF64B9D41F7120877F" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_4EFD944C7A383099CF97D41FBDD6BF0E_verboseLabel_en-US" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_4EFD944C7A383099CF97D41FBDD6BF0E" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Income (Loss) from Continuing Operations, Per Diluted Share</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_4EFD944C7A383099CF97D41FBDD6BF0E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_4EFD944C7A383099CF97D41FBDD6BF0E" xlink:to="lab_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_4EFD944C7A383099CF97D41FBDD6BF0E" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtDisclosureTextBlock_41D0B2B30D37CDF8D0FBC0112415FE47_verboseLabel_en-US" xlink:label="lab_us-gaap_DebtDisclosureTextBlock_41D0B2B30D37CDF8D0FBC0112415FE47" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Debt</link:label>
    <link:label id="lab_us-gaap_DebtDisclosureTextBlock_41D0B2B30D37CDF8D0FBC0112415FE47_label_en-US" xlink:label="lab_us-gaap_DebtDisclosureTextBlock_41D0B2B30D37CDF8D0FBC0112415FE47" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Disclosure [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtDisclosureTextBlock" xlink:label="loc_us-gaap_DebtDisclosureTextBlock_41D0B2B30D37CDF8D0FBC0112415FE47" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtDisclosureTextBlock_41D0B2B30D37CDF8D0FBC0112415FE47" xlink:to="lab_us-gaap_DebtDisclosureTextBlock_41D0B2B30D37CDF8D0FBC0112415FE47" xlink:type="arc" />
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_C86905B3ED7546DEA7FCC011241B9FF2_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_C86905B3ED7546DEA7FCC011241B9FF2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Remaining 2019</link:label>
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_C86905B3ED7546DEA7FCC011241B9FF2_label_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_C86905B3ED7546DEA7FCC011241B9FF2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_C86905B3ED7546DEA7FCC011241B9FF2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_C86905B3ED7546DEA7FCC011241B9FF2" xlink:to="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_C86905B3ED7546DEA7FCC011241B9FF2" xlink:type="arc" />
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_A430B25C075C245FEF08C011241B3BAF_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_A430B25C075C245FEF08C011241B3BAF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2020</link:label>
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_A430B25C075C245FEF08C011241B3BAF_label_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_A430B25C075C245FEF08C011241B3BAF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lessee, Operating Lease, Liability, Payments, Due Year Two</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_A430B25C075C245FEF08C011241B3BAF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_A430B25C075C245FEF08C011241B3BAF" xlink:to="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_A430B25C075C245FEF08C011241B3BAF" xlink:type="arc" />
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_C34941F52E0081D9951AC011241BA92F_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_C34941F52E0081D9951AC011241BA92F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2021</link:label>
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_C34941F52E0081D9951AC011241BA92F_label_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_C34941F52E0081D9951AC011241BA92F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lessee, Operating Lease, Liability, Payments, Due Year Three</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_C34941F52E0081D9951AC011241BA92F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_C34941F52E0081D9951AC011241BA92F" xlink:to="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_C34941F52E0081D9951AC011241BA92F" xlink:type="arc" />
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_45464FD1C85884DCEA96C011241B25C5_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_45464FD1C85884DCEA96C011241B25C5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2022</link:label>
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_45464FD1C85884DCEA96C011241B25C5_label_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_45464FD1C85884DCEA96C011241B25C5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lessee, Operating Lease, Liability, Payments, Due Year Four</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_45464FD1C85884DCEA96C011241B25C5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_45464FD1C85884DCEA96C011241B25C5" xlink:to="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_45464FD1C85884DCEA96C011241B25C5" xlink:type="arc" />
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_F9BE9D31E50AE4A2B8E6C011241BA75C_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_F9BE9D31E50AE4A2B8E6C011241BA75C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2023</link:label>
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_F9BE9D31E50AE4A2B8E6C011241BA75C_label_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_F9BE9D31E50AE4A2B8E6C011241BA75C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lessee, Operating Lease, Liability, Payments, Due Year Five</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_F9BE9D31E50AE4A2B8E6C011241BA75C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_F9BE9D31E50AE4A2B8E6C011241BA75C" xlink:to="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_F9BE9D31E50AE4A2B8E6C011241BA75C" xlink:type="arc" />
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_0D869A253E234DC80D7FC011241C2700_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_0D869A253E234DC80D7FC011241C2700" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Thereafter</link:label>
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_0D869A253E234DC80D7FC011241C2700_label_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_0D869A253E234DC80D7FC011241C2700" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lessee, Operating Lease, Liability, Payments, Due after Year Five</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_0D869A253E234DC80D7FC011241C2700" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_0D869A253E234DC80D7FC011241C2700" xlink:to="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_0D869A253E234DC80D7FC011241C2700" xlink:type="arc" />
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_5C0443081A0650DE2D8AC011241CD496_totalLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_5C0443081A0650DE2D8AC011241CD496" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total</link:label>
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_5C0443081A0650DE2D8AC011241CD496_label_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_5C0443081A0650DE2D8AC011241CD496" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lessee, Operating Lease, Liability, Payments, Due</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_5C0443081A0650DE2D8AC011241CD496" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_5C0443081A0650DE2D8AC011241CD496" xlink:to="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_5C0443081A0650DE2D8AC011241CD496" xlink:type="arc" />
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_FCF6F69A6F52D033B3B1C011241C2C49_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_FCF6F69A6F52D033B3B1C011241C2C49" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Less: Present value discount</link:label>
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_FCF6F69A6F52D033B3B1C011241C2C49_label_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_FCF6F69A6F52D033B3B1C011241C2C49" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lessee, Operating Lease, Liability, Undiscounted Excess Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_FCF6F69A6F52D033B3B1C011241C2C49" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_FCF6F69A6F52D033B3B1C011241C2C49" xlink:to="lab_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_FCF6F69A6F52D033B3B1C011241C2C49" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLeaseLiability_ED8D9D9465348B98EE84C011241C3485_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiability_ED8D9D9465348B98EE84C011241C3485" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Lease liability</link:label>
    <link:label id="lab_us-gaap_OperatingLeaseLiability_ED8D9D9465348B98EE84C011241C3485_label_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiability_ED8D9D9465348B98EE84C011241C3485" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Lease, Liability</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiability" xlink:label="loc_us-gaap_OperatingLeaseLiability_ED8D9D9465348B98EE84C011241C3485" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeaseLiability_ED8D9D9465348B98EE84C011241C3485" xlink:to="lab_us-gaap_OperatingLeaseLiability_ED8D9D9465348B98EE84C011241C3485" xlink:type="arc" />
    <link:label id="lab_us-gaap_RevenueFromContractWithCustomerTextBlock_18AC9A86FC6A58E81DE6C011246BE23C_terseLabel_en-US" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerTextBlock_18AC9A86FC6A58E81DE6C011246BE23C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revenue</link:label>
    <link:label id="lab_us-gaap_RevenueFromContractWithCustomerTextBlock_18AC9A86FC6A58E81DE6C011246BE23C_label_en-US" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerTextBlock_18AC9A86FC6A58E81DE6C011246BE23C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenue from Contract with Customer [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerTextBlock" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerTextBlock_18AC9A86FC6A58E81DE6C011246BE23C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevenueFromContractWithCustomerTextBlock_18AC9A86FC6A58E81DE6C011246BE23C" xlink:to="lab_us-gaap_RevenueFromContractWithCustomerTextBlock_18AC9A86FC6A58E81DE6C011246BE23C" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLeaseCost_3045F68CE9822941556CC01124219D87_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseCost_3045F68CE9822941556CC01124219D87" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Operating lease cost</link:label>
    <link:label id="lab_us-gaap_OperatingLeaseCost_3045F68CE9822941556CC01124219D87_label_en-US" xlink:label="lab_us-gaap_OperatingLeaseCost_3045F68CE9822941556CC01124219D87" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Lease, Cost</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseCost" xlink:label="loc_us-gaap_OperatingLeaseCost_3045F68CE9822941556CC01124219D87" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeaseCost_3045F68CE9822941556CC01124219D87" xlink:to="lab_us-gaap_OperatingLeaseCost_3045F68CE9822941556CC01124219D87" xlink:type="arc" />
    <link:label id="lab_us-gaap_VariableLeaseCost_DFB691F7C203F7D17415C0112421ADED_terseLabel_en-US" xlink:label="lab_us-gaap_VariableLeaseCost_DFB691F7C203F7D17415C0112421ADED" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Variable lease cost</link:label>
    <link:label id="lab_us-gaap_VariableLeaseCost_DFB691F7C203F7D17415C0112421ADED_label_en-US" xlink:label="lab_us-gaap_VariableLeaseCost_DFB691F7C203F7D17415C0112421ADED" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Variable Lease, Cost</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VariableLeaseCost" xlink:label="loc_us-gaap_VariableLeaseCost_DFB691F7C203F7D17415C0112421ADED" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_VariableLeaseCost_DFB691F7C203F7D17415C0112421ADED" xlink:to="lab_us-gaap_VariableLeaseCost_DFB691F7C203F7D17415C0112421ADED" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubleaseIncome_6E111A8A76A8348A137AC01124219FCD_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_SubleaseIncome_6E111A8A76A8348A137AC01124219FCD" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Sublease rental income</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SubleaseIncome" xlink:label="loc_us-gaap_SubleaseIncome_6E111A8A76A8348A137AC01124219FCD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubleaseIncome_6E111A8A76A8348A137AC01124219FCD" xlink:to="lab_us-gaap_SubleaseIncome_6E111A8A76A8348A137AC01124219FCD" xlink:type="arc" />
    <link:label id="lab_us-gaap_LeaseCost_D83698BC299BF6508377C0112421C9D8_totalLabel_en-US" xlink:label="lab_us-gaap_LeaseCost_D83698BC299BF6508377C0112421C9D8" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total lease cost</link:label>
    <link:label id="lab_us-gaap_LeaseCost_D83698BC299BF6508377C0112421C9D8_label_en-US" xlink:label="lab_us-gaap_LeaseCost_D83698BC299BF6508377C0112421C9D8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lease, Cost</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LeaseCost" xlink:label="loc_us-gaap_LeaseCost_D83698BC299BF6508377C0112421C9D8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LeaseCost_D83698BC299BF6508377C0112421C9D8" xlink:to="lab_us-gaap_LeaseCost_D83698BC299BF6508377C0112421C9D8" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLeasePayments_763D7B9B57EA38C7CDF4C0112422CA9C_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasePayments_763D7B9B57EA38C7CDF4C0112422CA9C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Operating cash flows</link:label>
    <link:label id="lab_us-gaap_OperatingLeasePayments_763D7B9B57EA38C7CDF4C0112422CA9C_label_en-US" xlink:label="lab_us-gaap_OperatingLeasePayments_763D7B9B57EA38C7CDF4C0112422CA9C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Lease, Payments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasePayments" xlink:label="loc_us-gaap_OperatingLeasePayments_763D7B9B57EA38C7CDF4C0112422CA9C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasePayments_763D7B9B57EA38C7CDF4C0112422CA9C" xlink:to="lab_us-gaap_OperatingLeasePayments_763D7B9B57EA38C7CDF4C0112422CA9C" xlink:type="arc" />
    <link:label id="lab_us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_575457C0B04D3F163750C0112422D889_terseLabel_en-US" xlink:label="lab_us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_575457C0B04D3F163750C0112422D889" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Right-of-use assets obtained in exchange for new operating lease liabilities</link:label>
    <link:label id="lab_us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_575457C0B04D3F163750C0112422D889_label_en-US" xlink:label="lab_us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_575457C0B04D3F163750C0112422D889" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Right-of-Use Asset Obtained in Exchange for Operating Lease Liability</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability" xlink:label="loc_us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_575457C0B04D3F163750C0112422D889" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_575457C0B04D3F163750C0112422D889" xlink:to="lab_us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_575457C0B04D3F163750C0112422D889" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_81151EA5B2F2A38C08D8C01124223FB6_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_81151EA5B2F2A38C08D8C01124223FB6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Weighted average remaining lease term (in years) - Operating leases</link:label>
    <link:label id="lab_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_81151EA5B2F2A38C08D8C01124223FB6_label_en-US" xlink:label="lab_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_81151EA5B2F2A38C08D8C01124223FB6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Lease, Weighted Average Remaining Lease Term</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_81151EA5B2F2A38C08D8C01124223FB6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_81151EA5B2F2A38C08D8C01124223FB6" xlink:to="lab_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_81151EA5B2F2A38C08D8C01124223FB6" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_D7A0E67AFD10F8B932ACC0112422B62F_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_D7A0E67AFD10F8B932ACC0112422B62F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Weighted average discount rate - Operating leases</link:label>
    <link:label id="lab_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_D7A0E67AFD10F8B932ACC0112422B62F_label_en-US" xlink:label="lab_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_D7A0E67AFD10F8B932ACC0112422B62F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Lease, Weighted Average Discount Rate, Percent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_D7A0E67AFD10F8B932ACC0112422B62F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_D7A0E67AFD10F8B932ACC0112422B62F" xlink:to="lab_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_D7A0E67AFD10F8B932ACC0112422B62F" xlink:type="arc" />
    <link:label id="lab_us-gaap_LeaseCostTableTextBlock_F81BFDAAB5D5B76C2EACC011242873C2_terseLabel_en-US" xlink:label="lab_us-gaap_LeaseCostTableTextBlock_F81BFDAAB5D5B76C2EACC011242873C2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Lease Costs and Other Quantitative Information</link:label>
    <link:label id="lab_us-gaap_LeaseCostTableTextBlock_F81BFDAAB5D5B76C2EACC011242873C2_label_en-US" xlink:label="lab_us-gaap_LeaseCostTableTextBlock_F81BFDAAB5D5B76C2EACC011242873C2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lease, Cost [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LeaseCostTableTextBlock" xlink:label="loc_us-gaap_LeaseCostTableTextBlock_F81BFDAAB5D5B76C2EACC011242873C2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LeaseCostTableTextBlock_F81BFDAAB5D5B76C2EACC011242873C2" xlink:to="lab_us-gaap_LeaseCostTableTextBlock_F81BFDAAB5D5B76C2EACC011242873C2" xlink:type="arc" />
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_F7826DC9EE3C88B431BDC0112428297D_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_F7826DC9EE3C88B431BDC0112428297D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Minimum Future Rental Payments</link:label>
    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_F7826DC9EE3C88B431BDC0112428297D_label_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_F7826DC9EE3C88B431BDC0112428297D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lessee, Operating Lease, Liability, Maturity [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_F7826DC9EE3C88B431BDC0112428297D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_F7826DC9EE3C88B431BDC0112428297D" xlink:to="lab_us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_F7826DC9EE3C88B431BDC0112428297D" xlink:type="arc" />
    <link:label id="lab_dei_CoverAbstract_0BD32223A88D6D86B5FDC011252E4BAA_label_en-US" xlink:label="lab_dei_CoverAbstract_0BD32223A88D6D86B5FDC011252E4BAA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cover [Abstract]</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_CoverAbstract" xlink:label="loc_dei_CoverAbstract_0BD32223A88D6D86B5FDC011252E4BAA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_CoverAbstract_0BD32223A88D6D86B5FDC011252E4BAA" xlink:to="lab_dei_CoverAbstract_0BD32223A88D6D86B5FDC011252E4BAA" xlink:type="arc" />
    <link:label id="lab_dei_EntitiesTable_159E66480B32E160B7F3C011252FBE44_terseLabel_en-US" xlink:label="lab_dei_EntitiesTable_159E66480B32E160B7F3C011252FBE44" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entities [Table]</link:label>
    <link:label id="lab_dei_EntitiesTable_159E66480B32E160B7F3C011252FBE44_label_en-US" xlink:label="lab_dei_EntitiesTable_159E66480B32E160B7F3C011252FBE44" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entities [Table]</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntitiesTable" xlink:label="loc_dei_EntitiesTable_159E66480B32E160B7F3C011252FBE44" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntitiesTable_159E66480B32E160B7F3C011252FBE44" xlink:to="lab_dei_EntitiesTable_159E66480B32E160B7F3C011252FBE44" xlink:type="arc" />
    <link:label id="lab_dei_EntityInformationLineItems_0E0795C8E3033F755C20C011253011F6_terseLabel_en-US" xlink:label="lab_dei_EntityInformationLineItems_0E0795C8E3033F755C20C011253011F6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Information [Line Items]</link:label>
    <link:label id="lab_dei_EntityInformationLineItems_0E0795C8E3033F755C20C011253011F6_label_en-US" xlink:label="lab_dei_EntityInformationLineItems_0E0795C8E3033F755C20C011253011F6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Information [Line Items]</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityInformationLineItems" xlink:label="loc_dei_EntityInformationLineItems_0E0795C8E3033F755C20C011253011F6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityInformationLineItems_0E0795C8E3033F755C20C011253011F6" xlink:to="lab_dei_EntityInformationLineItems_0E0795C8E3033F755C20C011253011F6" xlink:type="arc" />
    <link:label id="lab_dei_DocumentType_1CC4AB0560187ACF2951C0112530C19F_terseLabel_en-US" xlink:label="lab_dei_DocumentType_1CC4AB0560187ACF2951C0112530C19F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Type</link:label>
    <link:label id="lab_dei_DocumentType_1CC4AB0560187ACF2951C0112530C19F_label_en-US" xlink:label="lab_dei_DocumentType_1CC4AB0560187ACF2951C0112530C19F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Type</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentType" xlink:label="loc_dei_DocumentType_1CC4AB0560187ACF2951C0112530C19F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentType_1CC4AB0560187ACF2951C0112530C19F" xlink:to="lab_dei_DocumentType_1CC4AB0560187ACF2951C0112530C19F" xlink:type="arc" />
    <link:label id="lab_dei_DocumentQuarterlyReport_8571D9A271114432B248C0112530EEDE_terseLabel_en-US" xlink:label="lab_dei_DocumentQuarterlyReport_8571D9A271114432B248C0112530EEDE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Quarterly Report</link:label>
    <link:label id="lab_dei_DocumentQuarterlyReport_8571D9A271114432B248C0112530EEDE_label_en-US" xlink:label="lab_dei_DocumentQuarterlyReport_8571D9A271114432B248C0112530EEDE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Quarterly Report</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentQuarterlyReport" xlink:label="loc_dei_DocumentQuarterlyReport_8571D9A271114432B248C0112530EEDE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentQuarterlyReport_8571D9A271114432B248C0112530EEDE" xlink:to="lab_dei_DocumentQuarterlyReport_8571D9A271114432B248C0112530EEDE" xlink:type="arc" />
    <link:label id="lab_dei_DocumentPeriodEndDate_389EB70D1261F3B2FED5C011253023D0_terseLabel_en-US" xlink:label="lab_dei_DocumentPeriodEndDate_389EB70D1261F3B2FED5C011253023D0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Period End Date</link:label>
    <link:label id="lab_dei_DocumentPeriodEndDate_389EB70D1261F3B2FED5C011253023D0_label_en-US" xlink:label="lab_dei_DocumentPeriodEndDate_389EB70D1261F3B2FED5C011253023D0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Period End Date</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentPeriodEndDate" xlink:label="loc_dei_DocumentPeriodEndDate_389EB70D1261F3B2FED5C011253023D0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentPeriodEndDate_389EB70D1261F3B2FED5C011253023D0" xlink:to="lab_dei_DocumentPeriodEndDate_389EB70D1261F3B2FED5C011253023D0" xlink:type="arc" />
    <link:label id="lab_dei_DocumentTransitionReport_632B826E649ED145DB7CC01125316294_terseLabel_en-US" xlink:label="lab_dei_DocumentTransitionReport_632B826E649ED145DB7CC01125316294" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Transition Report</link:label>
    <link:label id="lab_dei_DocumentTransitionReport_632B826E649ED145DB7CC01125316294_label_en-US" xlink:label="lab_dei_DocumentTransitionReport_632B826E649ED145DB7CC01125316294" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Transition Report</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentTransitionReport" xlink:label="loc_dei_DocumentTransitionReport_632B826E649ED145DB7CC01125316294" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentTransitionReport_632B826E649ED145DB7CC01125316294" xlink:to="lab_dei_DocumentTransitionReport_632B826E649ED145DB7CC01125316294" xlink:type="arc" />
    <link:label id="lab_dei_EntityFileNumber_8CE3954EBDF690A4F4D8C0112531166C_terseLabel_en-US" xlink:label="lab_dei_EntityFileNumber_8CE3954EBDF690A4F4D8C0112531166C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity File Number</link:label>
    <link:label id="lab_dei_EntityFileNumber_8CE3954EBDF690A4F4D8C0112531166C_label_en-US" xlink:label="lab_dei_EntityFileNumber_8CE3954EBDF690A4F4D8C0112531166C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity File Number</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityFileNumber" xlink:label="loc_dei_EntityFileNumber_8CE3954EBDF690A4F4D8C0112531166C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityFileNumber_8CE3954EBDF690A4F4D8C0112531166C" xlink:to="lab_dei_EntityFileNumber_8CE3954EBDF690A4F4D8C0112531166C" xlink:type="arc" />
    <link:label id="lab_dei_EntityRegistrantName_8CA747B51BEC6C2860BCC0112531E81E_terseLabel_en-US" xlink:label="lab_dei_EntityRegistrantName_8CA747B51BEC6C2860BCC0112531E81E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Registrant Name</link:label>
    <link:label id="lab_dei_EntityRegistrantName_8CA747B51BEC6C2860BCC0112531E81E_label_en-US" xlink:label="lab_dei_EntityRegistrantName_8CA747B51BEC6C2860BCC0112531E81E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Registrant Name</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityRegistrantName" xlink:label="loc_dei_EntityRegistrantName_8CA747B51BEC6C2860BCC0112531E81E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityRegistrantName_8CA747B51BEC6C2860BCC0112531E81E" xlink:to="lab_dei_EntityRegistrantName_8CA747B51BEC6C2860BCC0112531E81E" xlink:type="arc" />
    <link:label id="lab_dei_EntityIncorporationStateCountryCode_377D81C04EB9A8B779E5C01125312C3B_terseLabel_en-US" xlink:label="lab_dei_EntityIncorporationStateCountryCode_377D81C04EB9A8B779E5C01125312C3B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Incorporation, State or Country Code</link:label>
    <link:label id="lab_dei_EntityIncorporationStateCountryCode_377D81C04EB9A8B779E5C01125312C3B_label_en-US" xlink:label="lab_dei_EntityIncorporationStateCountryCode_377D81C04EB9A8B779E5C01125312C3B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Incorporation, State or Country Code</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityIncorporationStateCountryCode" xlink:label="loc_dei_EntityIncorporationStateCountryCode_377D81C04EB9A8B779E5C01125312C3B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityIncorporationStateCountryCode_377D81C04EB9A8B779E5C01125312C3B" xlink:to="lab_dei_EntityIncorporationStateCountryCode_377D81C04EB9A8B779E5C01125312C3B" xlink:type="arc" />
    <link:label id="lab_dei_EntityTaxIdentificationNumber_A6DDF23815D52A1E188EC0112531CF15_terseLabel_en-US" xlink:label="lab_dei_EntityTaxIdentificationNumber_A6DDF23815D52A1E188EC0112531CF15" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Tax Identification Number</link:label>
    <link:label id="lab_dei_EntityTaxIdentificationNumber_A6DDF23815D52A1E188EC0112531CF15_label_en-US" xlink:label="lab_dei_EntityTaxIdentificationNumber_A6DDF23815D52A1E188EC0112531CF15" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Tax Identification Number</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityTaxIdentificationNumber" xlink:label="loc_dei_EntityTaxIdentificationNumber_A6DDF23815D52A1E188EC0112531CF15" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityTaxIdentificationNumber_A6DDF23815D52A1E188EC0112531CF15" xlink:to="lab_dei_EntityTaxIdentificationNumber_A6DDF23815D52A1E188EC0112531CF15" xlink:type="arc" />
    <link:label id="lab_dei_EntityAddressAddressLine1_D35CAA23FA1A4DF196A7C0112531C883_terseLabel_en-US" xlink:label="lab_dei_EntityAddressAddressLine1_D35CAA23FA1A4DF196A7C0112531C883" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Address, Address Line One</link:label>
    <link:label id="lab_dei_EntityAddressAddressLine1_D35CAA23FA1A4DF196A7C0112531C883_label_en-US" xlink:label="lab_dei_EntityAddressAddressLine1_D35CAA23FA1A4DF196A7C0112531C883" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Address, Address Line One</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressAddressLine1" xlink:label="loc_dei_EntityAddressAddressLine1_D35CAA23FA1A4DF196A7C0112531C883" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressAddressLine1_D35CAA23FA1A4DF196A7C0112531C883" xlink:to="lab_dei_EntityAddressAddressLine1_D35CAA23FA1A4DF196A7C0112531C883" xlink:type="arc" />
    <link:label id="lab_dei_EntityAddressCityOrTown_097D66CB20A09C652C0CC0112532B536_terseLabel_en-US" xlink:label="lab_dei_EntityAddressCityOrTown_097D66CB20A09C652C0CC0112532B536" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Address, City or Town</link:label>
    <link:label id="lab_dei_EntityAddressCityOrTown_097D66CB20A09C652C0CC0112532B536_label_en-US" xlink:label="lab_dei_EntityAddressCityOrTown_097D66CB20A09C652C0CC0112532B536" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Address, City or Town</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressCityOrTown" xlink:label="loc_dei_EntityAddressCityOrTown_097D66CB20A09C652C0CC0112532B536" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressCityOrTown_097D66CB20A09C652C0CC0112532B536" xlink:to="lab_dei_EntityAddressCityOrTown_097D66CB20A09C652C0CC0112532B536" xlink:type="arc" />
    <link:label id="lab_dei_EntityAddressStateOrProvince_5B76D6702C53D5B88D12C0112532DE15_terseLabel_en-US" xlink:label="lab_dei_EntityAddressStateOrProvince_5B76D6702C53D5B88D12C0112532DE15" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Address, State or Province</link:label>
    <link:label id="lab_dei_EntityAddressStateOrProvince_5B76D6702C53D5B88D12C0112532DE15_label_en-US" xlink:label="lab_dei_EntityAddressStateOrProvince_5B76D6702C53D5B88D12C0112532DE15" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Address, State or Province</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressStateOrProvince" xlink:label="loc_dei_EntityAddressStateOrProvince_5B76D6702C53D5B88D12C0112532DE15" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressStateOrProvince_5B76D6702C53D5B88D12C0112532DE15" xlink:to="lab_dei_EntityAddressStateOrProvince_5B76D6702C53D5B88D12C0112532DE15" xlink:type="arc" />
    <link:label id="lab_dei_EntityAddressPostalZipCode_96692BCBAC713C447280C011253201E3_terseLabel_en-US" xlink:label="lab_dei_EntityAddressPostalZipCode_96692BCBAC713C447280C011253201E3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Address, Postal Zip Code</link:label>
    <link:label id="lab_dei_EntityAddressPostalZipCode_96692BCBAC713C447280C011253201E3_label_en-US" xlink:label="lab_dei_EntityAddressPostalZipCode_96692BCBAC713C447280C011253201E3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Address, Postal Zip Code</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressPostalZipCode" xlink:label="loc_dei_EntityAddressPostalZipCode_96692BCBAC713C447280C011253201E3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityAddressPostalZipCode_96692BCBAC713C447280C011253201E3" xlink:to="lab_dei_EntityAddressPostalZipCode_96692BCBAC713C447280C011253201E3" xlink:type="arc" />
    <link:label id="lab_dei_CityAreaCode_7C503471C71E2111BC40C011253209E6_terseLabel_en-US" xlink:label="lab_dei_CityAreaCode_7C503471C71E2111BC40C011253209E6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">City Area Code</link:label>
    <link:label id="lab_dei_CityAreaCode_7C503471C71E2111BC40C011253209E6_label_en-US" xlink:label="lab_dei_CityAreaCode_7C503471C71E2111BC40C011253209E6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">City Area Code</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_CityAreaCode" xlink:label="loc_dei_CityAreaCode_7C503471C71E2111BC40C011253209E6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_CityAreaCode_7C503471C71E2111BC40C011253209E6" xlink:to="lab_dei_CityAreaCode_7C503471C71E2111BC40C011253209E6" xlink:type="arc" />
    <link:label id="lab_dei_LocalPhoneNumber_85F1EE645DC441874B79C01125336CBE_terseLabel_en-US" xlink:label="lab_dei_LocalPhoneNumber_85F1EE645DC441874B79C01125336CBE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Local Phone Number</link:label>
    <link:label id="lab_dei_LocalPhoneNumber_85F1EE645DC441874B79C01125336CBE_label_en-US" xlink:label="lab_dei_LocalPhoneNumber_85F1EE645DC441874B79C01125336CBE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Local Phone Number</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LocalPhoneNumber" xlink:label="loc_dei_LocalPhoneNumber_85F1EE645DC441874B79C01125336CBE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_LocalPhoneNumber_85F1EE645DC441874B79C01125336CBE" xlink:to="lab_dei_LocalPhoneNumber_85F1EE645DC441874B79C01125336CBE" xlink:type="arc" />
    <link:label id="lab_dei_Security12bTitle_6B160C893163471B950FC0112533E0FE_terseLabel_en-US" xlink:label="lab_dei_Security12bTitle_6B160C893163471B950FC0112533E0FE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Title of 12(b) Security</link:label>
    <link:label id="lab_dei_Security12bTitle_6B160C893163471B950FC0112533E0FE_label_en-US" xlink:label="lab_dei_Security12bTitle_6B160C893163471B950FC0112533E0FE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Title of 12(b) Security</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_Security12bTitle" xlink:label="loc_dei_Security12bTitle_6B160C893163471B950FC0112533E0FE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_Security12bTitle_6B160C893163471B950FC0112533E0FE" xlink:to="lab_dei_Security12bTitle_6B160C893163471B950FC0112533E0FE" xlink:type="arc" />
    <link:label id="lab_dei_TradingSymbol_BAAE53F41AB1B16C628FC011253313E2_terseLabel_en-US" xlink:label="lab_dei_TradingSymbol_BAAE53F41AB1B16C628FC011253313E2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Trading Symbol</link:label>
    <link:label id="lab_dei_TradingSymbol_BAAE53F41AB1B16C628FC011253313E2_label_en-US" xlink:label="lab_dei_TradingSymbol_BAAE53F41AB1B16C628FC011253313E2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Trading Symbol</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_TradingSymbol" xlink:label="loc_dei_TradingSymbol_BAAE53F41AB1B16C628FC011253313E2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_TradingSymbol_BAAE53F41AB1B16C628FC011253313E2" xlink:to="lab_dei_TradingSymbol_BAAE53F41AB1B16C628FC011253313E2" xlink:type="arc" />
    <link:label id="lab_dei_SecurityExchangeName_2AFE81F6A72B2A04CB9BC01125333E02_terseLabel_en-US" xlink:label="lab_dei_SecurityExchangeName_2AFE81F6A72B2A04CB9BC01125333E02" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Security Exchange Name</link:label>
    <link:label id="lab_dei_SecurityExchangeName_2AFE81F6A72B2A04CB9BC01125333E02_label_en-US" xlink:label="lab_dei_SecurityExchangeName_2AFE81F6A72B2A04CB9BC01125333E02" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Security Exchange Name</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_SecurityExchangeName" xlink:label="loc_dei_SecurityExchangeName_2AFE81F6A72B2A04CB9BC01125333E02" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_SecurityExchangeName_2AFE81F6A72B2A04CB9BC01125333E02" xlink:to="lab_dei_SecurityExchangeName_2AFE81F6A72B2A04CB9BC01125333E02" xlink:type="arc" />
    <link:label id="lab_dei_EntityCurrentReportingStatus_5DE78CF5878FAFC3EE56C0112533B6D8_terseLabel_en-US" xlink:label="lab_dei_EntityCurrentReportingStatus_5DE78CF5878FAFC3EE56C0112533B6D8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Current Reporting Status</link:label>
    <link:label id="lab_dei_EntityCurrentReportingStatus_5DE78CF5878FAFC3EE56C0112533B6D8_label_en-US" xlink:label="lab_dei_EntityCurrentReportingStatus_5DE78CF5878FAFC3EE56C0112533B6D8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Current Reporting Status</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityCurrentReportingStatus" xlink:label="loc_dei_EntityCurrentReportingStatus_5DE78CF5878FAFC3EE56C0112533B6D8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityCurrentReportingStatus_5DE78CF5878FAFC3EE56C0112533B6D8" xlink:to="lab_dei_EntityCurrentReportingStatus_5DE78CF5878FAFC3EE56C0112533B6D8" xlink:type="arc" />
    <link:label id="lab_dei_EntityInteractiveDataCurrent_1BE4F25EF80461CE128CC01125340646_terseLabel_en-US" xlink:label="lab_dei_EntityInteractiveDataCurrent_1BE4F25EF80461CE128CC01125340646" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Interactive Data Current</link:label>
    <link:label id="lab_dei_EntityInteractiveDataCurrent_1BE4F25EF80461CE128CC01125340646_label_en-US" xlink:label="lab_dei_EntityInteractiveDataCurrent_1BE4F25EF80461CE128CC01125340646" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Interactive Data Current</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityInteractiveDataCurrent" xlink:label="loc_dei_EntityInteractiveDataCurrent_1BE4F25EF80461CE128CC01125340646" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityInteractiveDataCurrent_1BE4F25EF80461CE128CC01125340646" xlink:to="lab_dei_EntityInteractiveDataCurrent_1BE4F25EF80461CE128CC01125340646" xlink:type="arc" />
    <link:label id="lab_dei_EntityFilerCategory_C08425399AB6CD3C47A4C011253434FB_terseLabel_en-US" xlink:label="lab_dei_EntityFilerCategory_C08425399AB6CD3C47A4C011253434FB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Filer Category</link:label>
    <link:label id="lab_dei_EntityFilerCategory_C08425399AB6CD3C47A4C011253434FB_label_en-US" xlink:label="lab_dei_EntityFilerCategory_C08425399AB6CD3C47A4C011253434FB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Filer Category</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityFilerCategory" xlink:label="loc_dei_EntityFilerCategory_C08425399AB6CD3C47A4C011253434FB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityFilerCategory_C08425399AB6CD3C47A4C011253434FB" xlink:to="lab_dei_EntityFilerCategory_C08425399AB6CD3C47A4C011253434FB" xlink:type="arc" />
    <link:label id="lab_dei_EntitySmallBusiness_34EE944568B6D31FF9D5C011253414A1_terseLabel_en-US" xlink:label="lab_dei_EntitySmallBusiness_34EE944568B6D31FF9D5C011253414A1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Small Business</link:label>
    <link:label id="lab_dei_EntitySmallBusiness_34EE944568B6D31FF9D5C011253414A1_label_en-US" xlink:label="lab_dei_EntitySmallBusiness_34EE944568B6D31FF9D5C011253414A1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Small Business</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntitySmallBusiness" xlink:label="loc_dei_EntitySmallBusiness_34EE944568B6D31FF9D5C011253414A1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntitySmallBusiness_34EE944568B6D31FF9D5C011253414A1" xlink:to="lab_dei_EntitySmallBusiness_34EE944568B6D31FF9D5C011253414A1" xlink:type="arc" />
    <link:label id="lab_dei_EntityEmergingGrowthCompany_1FC5F8E7A3246E3DD5AEC01125345ED1_terseLabel_en-US" xlink:label="lab_dei_EntityEmergingGrowthCompany_1FC5F8E7A3246E3DD5AEC01125345ED1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Emerging Growth Company</link:label>
    <link:label id="lab_dei_EntityEmergingGrowthCompany_1FC5F8E7A3246E3DD5AEC01125345ED1_label_en-US" xlink:label="lab_dei_EntityEmergingGrowthCompany_1FC5F8E7A3246E3DD5AEC01125345ED1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Emerging Growth Company</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityEmergingGrowthCompany" xlink:label="loc_dei_EntityEmergingGrowthCompany_1FC5F8E7A3246E3DD5AEC01125345ED1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityEmergingGrowthCompany_1FC5F8E7A3246E3DD5AEC01125345ED1" xlink:to="lab_dei_EntityEmergingGrowthCompany_1FC5F8E7A3246E3DD5AEC01125345ED1" xlink:type="arc" />
    <link:label id="lab_dei_EntityShellCompany_3AD6B654AAA77DD78C4FC0112534ACF5_terseLabel_en-US" xlink:label="lab_dei_EntityShellCompany_3AD6B654AAA77DD78C4FC0112534ACF5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Shell Company</link:label>
    <link:label id="lab_dei_EntityShellCompany_3AD6B654AAA77DD78C4FC0112534ACF5_label_en-US" xlink:label="lab_dei_EntityShellCompany_3AD6B654AAA77DD78C4FC0112534ACF5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Shell Company</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityShellCompany" xlink:label="loc_dei_EntityShellCompany_3AD6B654AAA77DD78C4FC0112534ACF5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityShellCompany_3AD6B654AAA77DD78C4FC0112534ACF5" xlink:to="lab_dei_EntityShellCompany_3AD6B654AAA77DD78C4FC0112534ACF5" xlink:type="arc" />
    <link:label id="lab_dei_EntityCommonStockSharesOutstanding_E27391FCA6FEFD6574A3C01125343E27_terseLabel_en-US" xlink:label="lab_dei_EntityCommonStockSharesOutstanding_E27391FCA6FEFD6574A3C01125343E27" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Common Stock, Shares Outstanding</link:label>
    <link:label id="lab_dei_EntityCommonStockSharesOutstanding_E27391FCA6FEFD6574A3C01125343E27_label_en-US" xlink:label="lab_dei_EntityCommonStockSharesOutstanding_E27391FCA6FEFD6574A3C01125343E27" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Common Stock, Shares Outstanding</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityCommonStockSharesOutstanding" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_E27391FCA6FEFD6574A3C01125343E27" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityCommonStockSharesOutstanding_E27391FCA6FEFD6574A3C01125343E27" xlink:to="lab_dei_EntityCommonStockSharesOutstanding_E27391FCA6FEFD6574A3C01125343E27" xlink:type="arc" />
    <link:label id="lab_dei_EntityCentralIndexKey_A209F05741737C1C94D1C01125355906_terseLabel_en-US" xlink:label="lab_dei_EntityCentralIndexKey_A209F05741737C1C94D1C01125355906" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Central Index Key</link:label>
    <link:label id="lab_dei_EntityCentralIndexKey_A209F05741737C1C94D1C01125355906_label_en-US" xlink:label="lab_dei_EntityCentralIndexKey_A209F05741737C1C94D1C01125355906" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Central Index Key</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityCentralIndexKey" xlink:label="loc_dei_EntityCentralIndexKey_A209F05741737C1C94D1C01125355906" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityCentralIndexKey_A209F05741737C1C94D1C01125355906" xlink:to="lab_dei_EntityCentralIndexKey_A209F05741737C1C94D1C01125355906" xlink:type="arc" />
    <link:label id="lab_dei_CurrentFiscalYearEndDate_09EFD4DBC190B4DF8384C01125350074_terseLabel_en-US" xlink:label="lab_dei_CurrentFiscalYearEndDate_09EFD4DBC190B4DF8384C01125350074" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Current Fiscal Year End Date</link:label>
    <link:label id="lab_dei_CurrentFiscalYearEndDate_09EFD4DBC190B4DF8384C01125350074_label_en-US" xlink:label="lab_dei_CurrentFiscalYearEndDate_09EFD4DBC190B4DF8384C01125350074" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Current Fiscal Year End Date</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_CurrentFiscalYearEndDate" xlink:label="loc_dei_CurrentFiscalYearEndDate_09EFD4DBC190B4DF8384C01125350074" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_CurrentFiscalYearEndDate_09EFD4DBC190B4DF8384C01125350074" xlink:to="lab_dei_CurrentFiscalYearEndDate_09EFD4DBC190B4DF8384C01125350074" xlink:type="arc" />
    <link:label id="lab_dei_DocumentFiscalYearFocus_118117496CF47D0E7A1EC0112535A5B9_terseLabel_en-US" xlink:label="lab_dei_DocumentFiscalYearFocus_118117496CF47D0E7A1EC0112535A5B9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Fiscal Year Focus</link:label>
    <link:label id="lab_dei_DocumentFiscalYearFocus_118117496CF47D0E7A1EC0112535A5B9_label_en-US" xlink:label="lab_dei_DocumentFiscalYearFocus_118117496CF47D0E7A1EC0112535A5B9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Fiscal Year Focus</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentFiscalYearFocus" xlink:label="loc_dei_DocumentFiscalYearFocus_118117496CF47D0E7A1EC0112535A5B9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentFiscalYearFocus_118117496CF47D0E7A1EC0112535A5B9" xlink:to="lab_dei_DocumentFiscalYearFocus_118117496CF47D0E7A1EC0112535A5B9" xlink:type="arc" />
    <link:label id="lab_dei_DocumentFiscalPeriodFocus_B85A36F17990B4CE1B15C0112535E902_terseLabel_en-US" xlink:label="lab_dei_DocumentFiscalPeriodFocus_B85A36F17990B4CE1B15C0112535E902" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Fiscal Period Focus</link:label>
    <link:label id="lab_dei_DocumentFiscalPeriodFocus_B85A36F17990B4CE1B15C0112535E902_label_en-US" xlink:label="lab_dei_DocumentFiscalPeriodFocus_B85A36F17990B4CE1B15C0112535E902" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Fiscal Period Focus</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="loc_dei_DocumentFiscalPeriodFocus_B85A36F17990B4CE1B15C0112535E902" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentFiscalPeriodFocus_B85A36F17990B4CE1B15C0112535E902" xlink:to="lab_dei_DocumentFiscalPeriodFocus_B85A36F17990B4CE1B15C0112535E902" xlink:type="arc" />
    <link:label id="lab_dei_AmendmentFlag_142568A87682A3223A99C01125352F21_terseLabel_en-US" xlink:label="lab_dei_AmendmentFlag_142568A87682A3223A99C01125352F21" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amendment Flag</link:label>
    <link:label id="lab_dei_AmendmentFlag_142568A87682A3223A99C01125352F21_label_en-US" xlink:label="lab_dei_AmendmentFlag_142568A87682A3223A99C01125352F21" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Amendment Flag</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_AmendmentFlag" xlink:label="loc_dei_AmendmentFlag_142568A87682A3223A99C01125352F21" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_AmendmentFlag_142568A87682A3223A99C01125352F21" xlink:to="lab_dei_AmendmentFlag_142568A87682A3223A99C01125352F21" xlink:type="arc" />
  </link:labelLink>
</link:linkbase>
