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    <link:label id="lab_us-gaap_AssetsLeasedToOthersMember_0BA850E27627CA629A649E04A8A48E92_terseLabel_en-US" xlink:label="lab_us-gaap_AssetsLeasedToOthersMember_0BA850E27627CA629A649E04A8A48E92" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Assets Leased to Others</link:label>
    <link:label id="lab_us-gaap_AssetsLeasedToOthersMember_0BA850E27627CA629A649E04A8A48E92_label_en-US" xlink:label="lab_us-gaap_AssetsLeasedToOthersMember_0BA850E27627CA629A649E04A8A48E92" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets Leased to Others [Member]</link:label>
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    <link:label id="lab_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_C103C557F7DB7453A3499E04A8A4893E_terseLabel_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_C103C557F7DB7453A3499E04A8A4893E" 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_C103C557F7DB7453A3499E04A8A4893E_label_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_C103C557F7DB7453A3499E04A8A4893E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Related Party [Axis]</link:label>
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    <link:label id="lab_us-gaap_RelatedPartyDomain_A03A965889F44859FC249E04A8A4F659_terseLabel_en-US" xlink:label="lab_us-gaap_RelatedPartyDomain_A03A965889F44859FC249E04A8A4F659" 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_A03A965889F44859FC249E04A8A4F659_label_en-US" xlink:label="lab_us-gaap_RelatedPartyDomain_A03A965889F44859FC249E04A8A4F659" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Related Party [Domain]</link:label>
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    <link:label id="lab_dei_EntityInformationLineItems_7C2F07D188AF4115E20D9E04A8A45335_terseLabel_en-US" xlink:label="lab_dei_EntityInformationLineItems_7C2F07D188AF4115E20D9E04A8A45335" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Information [Line Items]</link:label>
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    <link:label id="lab_us-gaap_NumberOfRealEstateProperties_A481FD4BC86017DDA2B99E04A8A4C5C8_terseLabel_en-US" xlink:label="lab_us-gaap_NumberOfRealEstateProperties_A481FD4BC86017DDA2B99E04A8A4C5C8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of real estate properties</link:label>
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    <link:label id="lab_us-gaap_AreaOfRealEstateProperty_FBF4D4BD2BDC8FCE7C9E9E04A8A4B332_verboseLabel_en-US" xlink:label="lab_us-gaap_AreaOfRealEstateProperty_FBF4D4BD2BDC8FCE7C9E9E04A8A4B332" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Square footage of asset</link:label>
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    <link:label id="lab_ivtp_RealEstatePropertySquareFootageOccupiedPercent_B6EF53A8E41DE9B94B199E04A8A4D6FC_terseLabel_en-US" xlink:label="lab_ivtp_RealEstatePropertySquareFootageOccupiedPercent_B6EF53A8E41DE9B94B199E04A8A4D6FC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Square footage occupied</link:label>
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    <link:loc xlink:href="ivtp-20170930.xsd#ivtp_RealEstatePropertySquareFootageOccupiedPercent" xlink:label="loc_ivtp_RealEstatePropertySquareFootageOccupiedPercent_B6EF53A8E41DE9B94B199E04A8A4D6FC" xlink:type="locator" />
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    <link:label id="lab_ivtp_NumberOfJointVentures_3BAF3391084B336D03939E04A8A447CE_terseLabel_en-US" xlink:label="lab_ivtp_NumberOfJointVentures_3BAF3391084B336D03939E04A8A447CE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of operating real estate joint ventures</link:label>
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    <link:label id="lab_us-gaap_BusinessCombinationsAbstract_A661A103E71443B48C1C50A0F05FD93C_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationsAbstract_A661A103E71443B48C1C50A0F05FD93C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combinations [Abstract]</link:label>
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    <link:label id="lab_us-gaap_AwardTypeAxis_443AA5C24442DB0E2AB54FCE1AB63301_terseLabel_en-US" xlink:label="lab_us-gaap_AwardTypeAxis_443AA5C24442DB0E2AB54FCE1AB63301" 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_443AA5C24442DB0E2AB54FCE1AB63301_label_en-US" xlink:label="lab_us-gaap_AwardTypeAxis_443AA5C24442DB0E2AB54FCE1AB63301" 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/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_443AA5C24442DB0E2AB54FCE1AB63301" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_D96ACD71D3D97CB463834FCE1AB65A16_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_D96ACD71D3D97CB463834FCE1AB65A16" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity Award [Domain]</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_D96ACD71D3D97CB463834FCE1AB65A16_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_D96ACD71D3D97CB463834FCE1AB65A16" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Award [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_D96ACD71D3D97CB463834FCE1AB65A16" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_D96ACD71D3D97CB463834FCE1AB65A16" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_D96ACD71D3D97CB463834FCE1AB65A16" xlink:type="arc" />
    <link:label id="lab_us-gaap_RestrictedStockUnitsRSUMember_9B21249233596BA52FBC4FCE1AB6DFD3_terseLabel_en-US" xlink:label="lab_us-gaap_RestrictedStockUnitsRSUMember_9B21249233596BA52FBC4FCE1AB6DFD3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Restricted Stock Units</link:label>
    <link:label id="lab_us-gaap_RestrictedStockUnitsRSUMember_9B21249233596BA52FBC4FCE1AB6DFD3_label_en-US" xlink:label="lab_us-gaap_RestrictedStockUnitsRSUMember_9B21249233596BA52FBC4FCE1AB6DFD3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Restricted Stock Units (RSUs) [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_9B21249233596BA52FBC4FCE1AB6DFD3" xlink:type="locator" />
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    <link:label id="lab_us-gaap_AwardDateAxis_4D9E30D552D90071778B4FCE1AB684E8_terseLabel_en-US" xlink:label="lab_us-gaap_AwardDateAxis_4D9E30D552D90071778B4FCE1AB684E8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Award Date [Axis]</link:label>
    <link:label id="lab_us-gaap_AwardDateAxis_4D9E30D552D90071778B4FCE1AB684E8_label_en-US" xlink:label="lab_us-gaap_AwardDateAxis_4D9E30D552D90071778B4FCE1AB684E8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Award Date [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AwardDateAxis" xlink:label="loc_us-gaap_AwardDateAxis_4D9E30D552D90071778B4FCE1AB684E8" xlink:type="locator" />
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    <link:label id="lab_us-gaap_AwardDateDomain_AC074402F23D3566D7644FCE1AB6082A_terseLabel_en-US" xlink:label="lab_us-gaap_AwardDateDomain_AC074402F23D3566D7644FCE1AB6082A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Award Date [Domain]</link:label>
    <link:label id="lab_us-gaap_AwardDateDomain_AC074402F23D3566D7644FCE1AB6082A_label_en-US" xlink:label="lab_us-gaap_AwardDateDomain_AC074402F23D3566D7644FCE1AB6082A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Award Date [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AwardDateDomain" xlink:label="loc_us-gaap_AwardDateDomain_AC074402F23D3566D7644FCE1AB6082A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AwardDateDomain_AC074402F23D3566D7644FCE1AB6082A" xlink:to="lab_us-gaap_AwardDateDomain_AC074402F23D3566D7644FCE1AB6082A" xlink:type="arc" />
    <link:label id="lab_ivtp_Grantedin2015Member_B011EDE275358768BE9C4FCE1AB6656A_terseLabel_en-US" xlink:label="lab_ivtp_Grantedin2015Member_B011EDE275358768BE9C4FCE1AB6656A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Granted in 2015</link:label>
    <link:label id="lab_ivtp_Grantedin2015Member_B011EDE275358768BE9C4FCE1AB6656A_label_en-US" xlink:label="lab_ivtp_Grantedin2015Member_B011EDE275358768BE9C4FCE1AB6656A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Granted in 2015 [Member]</link:label>
    <link:label id="lab_ivtp_Grantedin2015Member_B011EDE275358768BE9C4FCE1AB6656A_documentation_en-US" xlink:label="lab_ivtp_Grantedin2015Member_B011EDE275358768BE9C4FCE1AB6656A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Granted in 2015 [Member]</link:label>
    <link:loc xlink:href="ivtp-20170930.xsd#ivtp_Grantedin2015Member" xlink:label="loc_ivtp_Grantedin2015Member_B011EDE275358768BE9C4FCE1AB6656A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ivtp_Grantedin2015Member_B011EDE275358768BE9C4FCE1AB6656A" xlink:to="lab_ivtp_Grantedin2015Member_B011EDE275358768BE9C4FCE1AB6656A" xlink:type="arc" />
    <link:label id="lab_ivtp_Grantedin2016Member_01872BB906B61BB789584FCE1AB6C8A2_terseLabel_en-US" xlink:label="lab_ivtp_Grantedin2016Member_01872BB906B61BB789584FCE1AB6C8A2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Granted in 2016</link:label>
    <link:label id="lab_ivtp_Grantedin2016Member_01872BB906B61BB789584FCE1AB6C8A2_label_en-US" xlink:label="lab_ivtp_Grantedin2016Member_01872BB906B61BB789584FCE1AB6C8A2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Granted in 2016 [Member]</link:label>
    <link:label id="lab_ivtp_Grantedin2016Member_01872BB906B61BB789584FCE1AB6C8A2_documentation_en-US" xlink:label="lab_ivtp_Grantedin2016Member_01872BB906B61BB789584FCE1AB6C8A2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Granted in 2016 [Member]</link:label>
    <link:loc xlink:href="ivtp-20170930.xsd#ivtp_Grantedin2016Member" xlink:label="loc_ivtp_Grantedin2016Member_01872BB906B61BB789584FCE1AB6C8A2" xlink:type="locator" />
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    <link:label id="lab_ivtp_Grantedin2017Member_397945F92836AFCE7A804FCE1AB6F35B_terseLabel_en-US" xlink:label="lab_ivtp_Grantedin2017Member_397945F92836AFCE7A804FCE1AB6F35B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Granted in 2017</link:label>
    <link:label id="lab_ivtp_Grantedin2017Member_397945F92836AFCE7A804FCE1AB6F35B_label_en-US" xlink:label="lab_ivtp_Grantedin2017Member_397945F92836AFCE7A804FCE1AB6F35B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Granted in 2017 [Member]</link:label>
    <link:label id="lab_ivtp_Grantedin2017Member_397945F92836AFCE7A804FCE1AB6F35B_documentation_en-US" xlink:label="lab_ivtp_Grantedin2017Member_397945F92836AFCE7A804FCE1AB6F35B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Granted in 2017 [Member]</link:label>
    <link:loc xlink:href="ivtp-20170930.xsd#ivtp_Grantedin2017Member" xlink:label="loc_ivtp_Grantedin2017Member_397945F92836AFCE7A804FCE1AB6F35B" xlink:type="locator" />
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    <link:label id="lab_us-gaap_VestingAxis_616A3B4EC22DE951FFCE4FCE1AB637A3_label_en-US" xlink:label="lab_us-gaap_VestingAxis_616A3B4EC22DE951FFCE4FCE1AB637A3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Vesting [Axis]</link:label>
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    <link:label id="lab_us-gaap_VestingDomain_F60B709865CA2CE0BE464FCE1AB662A2_label_en-US" xlink:label="lab_us-gaap_VestingDomain_F60B709865CA2CE0BE464FCE1AB662A2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Vesting [Domain]</link:label>
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    <link:label id="lab_ivtp_AwardsGrantedGroup1Member_B2D23CE0C500ED79CA8E50088D37DA6A_terseLabel_en-US" xlink:label="lab_ivtp_AwardsGrantedGroup1Member_B2D23CE0C500ED79CA8E50088D37DA6A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Awards granted, group 1</link:label>
    <link:label id="lab_ivtp_AwardsGrantedGroup1Member_B2D23CE0C500ED79CA8E50088D37DA6A_label_en-US" xlink:label="lab_ivtp_AwardsGrantedGroup1Member_B2D23CE0C500ED79CA8E50088D37DA6A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Awards Granted, Group 1 [Member]</link:label>
    <link:label id="lab_ivtp_AwardsGrantedGroup1Member_B2D23CE0C500ED79CA8E50088D37DA6A_documentation_en-US" xlink:label="lab_ivtp_AwardsGrantedGroup1Member_B2D23CE0C500ED79CA8E50088D37DA6A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Awards Granted, Group 1 [Member]</link:label>
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    <link:label id="lab_ivtp_AwardsGrantedGroup2Member_35417F9A9153BADA28025008E7801C91_terseLabel_en-US" xlink:label="lab_ivtp_AwardsGrantedGroup2Member_35417F9A9153BADA28025008E7801C91" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Awards granted, group 2</link:label>
    <link:label id="lab_ivtp_AwardsGrantedGroup2Member_35417F9A9153BADA28025008E7801C91_label_en-US" xlink:label="lab_ivtp_AwardsGrantedGroup2Member_35417F9A9153BADA28025008E7801C91" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Awards Granted, Group 2 [Member]</link:label>
    <link:label id="lab_ivtp_AwardsGrantedGroup2Member_35417F9A9153BADA28025008E7801C91_documentation_en-US" xlink:label="lab_ivtp_AwardsGrantedGroup2Member_35417F9A9153BADA28025008E7801C91" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Awards Granted, Group 2 [Member]</link:label>
    <link:loc xlink:href="ivtp-20170930.xsd#ivtp_AwardsGrantedGroup2Member" xlink:label="loc_ivtp_AwardsGrantedGroup2Member_35417F9A9153BADA28025008E7801C91" xlink:type="locator" />
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    <link:label id="lab_ivtp_SharebasedCompensationAwardTrancheFourMember_74095F049E2C29CC90224FCE1AB69CF6_terseLabel_en-US" xlink:label="lab_ivtp_SharebasedCompensationAwardTrancheFourMember_74095F049E2C29CC90224FCE1AB69CF6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Awards granted, vested in 2017, group 1</link:label>
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    <link:label id="lab_ivtp_SharebasedCompensationAwardTrancheFiveMember_4D78BA537D40F8CCA99D4FCE1AB6A82E_terseLabel_en-US" xlink:label="lab_ivtp_SharebasedCompensationAwardTrancheFiveMember_4D78BA537D40F8CCA99D4FCE1AB6A82E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Awards granted, vested in 2017, group 2</link:label>
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    <link:label id="lab_ivtp_A5YearTrancheMember_AAC374EA5935401FC1EB9E23EBE11CA9_terseLabel_en-US" xlink:label="lab_ivtp_A5YearTrancheMember_AAC374EA5935401FC1EB9E23EBE11CA9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">5-Year Tranche</link:label>
    <link:label id="lab_ivtp_A5YearTrancheMember_AAC374EA5935401FC1EB9E23EBE11CA9_label_en-US" xlink:label="lab_ivtp_A5YearTrancheMember_AAC374EA5935401FC1EB9E23EBE11CA9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">5-Year Tranche [Member]</link:label>
    <link:label id="lab_ivtp_A5YearTrancheMember_AAC374EA5935401FC1EB9E23EBE11CA9_documentation_en-US" xlink:label="lab_ivtp_A5YearTrancheMember_AAC374EA5935401FC1EB9E23EBE11CA9" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">5-Year Tranche [Member]</link:label>
    <link:loc xlink:href="ivtp-20170930.xsd#ivtp_A5YearTrancheMember" xlink:label="loc_ivtp_A5YearTrancheMember_AAC374EA5935401FC1EB9E23EBE11CA9" xlink:type="locator" />
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    <link:label id="lab_ivtp_A7YearTrancheMember_6B02C245AEAB619FE21A9E23EBE20604_terseLabel_en-US" xlink:label="lab_ivtp_A7YearTrancheMember_6B02C245AEAB619FE21A9E23EBE20604" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">7-Year Tranche</link:label>
    <link:label id="lab_ivtp_A7YearTrancheMember_6B02C245AEAB619FE21A9E23EBE20604_label_en-US" xlink:label="lab_ivtp_A7YearTrancheMember_6B02C245AEAB619FE21A9E23EBE20604" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">7-Year Tranche [Member]</link:label>
    <link:label id="lab_ivtp_A7YearTrancheMember_6B02C245AEAB619FE21A9E23EBE20604_documentation_en-US" xlink:label="lab_ivtp_A7YearTrancheMember_6B02C245AEAB619FE21A9E23EBE20604" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">7-Year Tranche [Member]</link:label>
    <link:loc xlink:href="ivtp-20170930.xsd#ivtp_A7YearTrancheMember" xlink:label="loc_ivtp_A7YearTrancheMember_6B02C245AEAB619FE21A9E23EBE20604" xlink:type="locator" />
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    <link:label id="lab_us-gaap_VariableRateAxis_6B401354B6549290691E9E23EBE2D0E5_terseLabel_en-US" xlink:label="lab_us-gaap_VariableRateAxis_6B401354B6549290691E9E23EBE2D0E5" 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_6B401354B6549290691E9E23EBE2D0E5_label_en-US" xlink:label="lab_us-gaap_VariableRateAxis_6B401354B6549290691E9E23EBE2D0E5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Variable Rate [Axis]</link:label>
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    <link:label id="lab_us-gaap_VariableRateDomain_B5EBB64693A13CECD7D49E23EBE21DCC_terseLabel_en-US" xlink:label="lab_us-gaap_VariableRateDomain_B5EBB64693A13CECD7D49E23EBE21DCC" 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_B5EBB64693A13CECD7D49E23EBE21DCC_label_en-US" xlink:label="lab_us-gaap_VariableRateDomain_B5EBB64693A13CECD7D49E23EBE21DCC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Variable Rate [Domain]</link:label>
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    <link:label id="lab_us-gaap_LondonInterbankOfferedRateLIBORMember_97A88F76BABAFDE5B6379E23EBE2D800_terseLabel_en-US" xlink:label="lab_us-gaap_LondonInterbankOfferedRateLIBORMember_97A88F76BABAFDE5B6379E23EBE2D800" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">One-month LIBOR</link:label>
    <link:label id="lab_us-gaap_LondonInterbankOfferedRateLIBORMember_97A88F76BABAFDE5B6379E23EBE2D800_label_en-US" xlink:label="lab_us-gaap_LondonInterbankOfferedRateLIBORMember_97A88F76BABAFDE5B6379E23EBE2D800" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">London Interbank Offered Rate (LIBOR) [Member]</link:label>
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    <link:label id="lab_us-gaap_MortgageLoansOnRealEstateNumberOfLoans_63F08D5081BF27F305709E23EBE3E97F_verboseLabel_en-US" xlink:label="lab_us-gaap_MortgageLoansOnRealEstateNumberOfLoans_63F08D5081BF27F305709E23EBE3E97F" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Number of mortgage loans on real estate in default</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MortgageLoansOnRealEstateNumberOfLoans" xlink:label="loc_us-gaap_MortgageLoansOnRealEstateNumberOfLoans_63F08D5081BF27F305709E23EBE3E97F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MortgageLoansOnRealEstateNumberOfLoans_63F08D5081BF27F305709E23EBE3E97F" xlink:to="lab_us-gaap_MortgageLoansOnRealEstateNumberOfLoans_63F08D5081BF27F305709E23EBE3E97F" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtDefaultLongtermDebtAmount_B94C004A67C6E7351D2A9E23EBE39A82_terseLabel_en-US" xlink:label="lab_us-gaap_DebtDefaultLongtermDebtAmount_B94C004A67C6E7351D2A9E23EBE39A82" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aggregate carrying value of loans in default</link:label>
    <link:label id="lab_us-gaap_DebtDefaultLongtermDebtAmount_B94C004A67C6E7351D2A9E23EBE39A82_label_en-US" xlink:label="lab_us-gaap_DebtDefaultLongtermDebtAmount_B94C004A67C6E7351D2A9E23EBE39A82" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Debt Default, Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtDefaultLongtermDebtAmount" xlink:label="loc_us-gaap_DebtDefaultLongtermDebtAmount_B94C004A67C6E7351D2A9E23EBE39A82" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtDefaultLongtermDebtAmount_B94C004A67C6E7351D2A9E23EBE39A82" xlink:to="lab_us-gaap_DebtDefaultLongtermDebtAmount_B94C004A67C6E7351D2A9E23EBE39A82" xlink:type="arc" />
    <link:label id="lab_ivtp_RecourseDebt_F3D515F77A5456E7B1729E23EBE3A362_terseLabel_en-US" xlink:label="lab_ivtp_RecourseDebt_F3D515F77A5456E7B1729E23EBE3A362" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Recourse debt</link:label>
    <link:label id="lab_ivtp_RecourseDebt_F3D515F77A5456E7B1729E23EBE3A362_label_en-US" xlink:label="lab_ivtp_RecourseDebt_F3D515F77A5456E7B1729E23EBE3A362" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Recourse Debt</link:label>
    <link:label id="lab_ivtp_RecourseDebt_F3D515F77A5456E7B1729E23EBE3A362_documentation_en-US" xlink:label="lab_ivtp_RecourseDebt_F3D515F77A5456E7B1729E23EBE3A362" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Recourse Debt</link:label>
    <link:loc xlink:href="ivtp-20170930.xsd#ivtp_RecourseDebt" xlink:label="loc_ivtp_RecourseDebt_F3D515F77A5456E7B1729E23EBE3A362" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ivtp_RecourseDebt_F3D515F77A5456E7B1729E23EBE3A362" xlink:to="lab_ivtp_RecourseDebt_F3D515F77A5456E7B1729E23EBE3A362" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansAssumed1_C4BE45BD202BEBC5966C9E23EBE3CED4_terseLabel_en-US" xlink:label="lab_us-gaap_LoansAssumed1_C4BE45BD202BEBC5966C9E23EBE3CED4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Assumption of mortgage debt upon acquisition of investment property</link:label>
    <link:label id="lab_us-gaap_LoansAssumed1_C4BE45BD202BEBC5966C9E23EBE3CED4_label_en-US" xlink:label="lab_us-gaap_LoansAssumed1_C4BE45BD202BEBC5966C9E23EBE3CED4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Assumed</link:label>
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    <link:label id="lab_us-gaap_NumberOfBusinessesAcquired_574C923499FAA75608769E23EBE3A09B_verboseLabel_en-US" xlink:label="lab_us-gaap_NumberOfBusinessesAcquired_574C923499FAA75608769E23EBE3A09B" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Number of acquisitions</link:label>
    <link:label id="lab_us-gaap_NumberOfBusinessesAcquired_574C923499FAA75608769E23EBE3A09B_label_en-US" xlink:label="lab_us-gaap_NumberOfBusinessesAcquired_574C923499FAA75608769E23EBE3A09B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number of Businesses Acquired</link:label>
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    <link:label id="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_B94C0619BD32532D253F9E23EBE4DF0E_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_B94C0619BD32532D253F9E23EBE4DF0E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Line of credit facility, maximum borrowing capacity</link:label>
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    <link:label id="lab_ivtp_NumberofLenders_999DD3423B76AA00D8779E23EBE41664_terseLabel_en-US" xlink:label="lab_ivtp_NumberofLenders_999DD3423B76AA00D8779E23EBE41664" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of lenders</link:label>
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    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_AD52AF30A23094FC2D579E23EBE484D8" xlink:to="lab_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_AD52AF30A23094FC2D579E23EBE484D8" xlink:type="arc" />
    <link:label id="lab_ivtp_Numberoftranchesinloancreditfacility_37C7D1416B115D4D609B9E23EBE4E53D_terseLabel_en-US" xlink:label="lab_ivtp_Numberoftranchesinloancreditfacility_37C7D1416B115D4D609B9E23EBE4E53D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of tranches in loan credit facility</link:label>
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    <link:loc xlink:href="ivtp-20170930.xsd#ivtp_Numberoftranchesinloancreditfacility" xlink:label="loc_ivtp_Numberoftranchesinloancreditfacility_37C7D1416B115D4D609B9E23EBE4E53D" xlink:type="locator" />
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    <link:loc xlink:href="ivtp-20170930.xsd#ivtp_DisposalGroupIncludingDiscontinuedOperationsInterestIncomeTaxExpenseandOtherExpenseIncome" xlink:label="loc_ivtp_DisposalGroupIncludingDiscontinuedOperationsInterestIncomeTaxExpenseandOtherExpenseIncome_E38AF99CBD8A90862295A1C1599C35C9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ivtp_DisposalGroupIncludingDiscontinuedOperationsInterestIncomeTaxExpenseandOtherExpenseIncome_E38AF99CBD8A90862295A1C1599C35C9" xlink:to="lab_ivtp_DisposalGroupIncludingDiscontinuedOperationsInterestIncomeTaxExpenseandOtherExpenseIncome_E38AF99CBD8A90862295A1C1599C35C9" xlink:type="arc" />
    <link:label id="lab_ivtp_DisposalGroupIncludingDiscontinuedOperationsIncomeLossFromEquityInvestments_DE42ABD8239EF253FD19A1C1599CB026_terseLabel_en-US" xlink:label="lab_ivtp_DisposalGroupIncludingDiscontinuedOperationsIncomeLossFromEquityInvestments_DE42ABD8239EF253FD19A1C1599CB026" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity in earnings of unconsolidated entity</link:label>
    <link:label id="lab_ivtp_DisposalGroupIncludingDiscontinuedOperationsIncomeLossFromEquityInvestments_DE42ABD8239EF253FD19A1C1599CB026_label_en-US" xlink:label="lab_ivtp_DisposalGroupIncludingDiscontinuedOperationsIncomeLossFromEquityInvestments_DE42ABD8239EF253FD19A1C1599CB026" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disposal Group, Including Discontinued Operations, Income (Loss) From Equity Investments</link:label>
    <link:label id="lab_ivtp_DisposalGroupIncludingDiscontinuedOperationsIncomeLossFromEquityInvestments_DE42ABD8239EF253FD19A1C1599CB026_documentation_en-US" xlink:label="lab_ivtp_DisposalGroupIncludingDiscontinuedOperationsIncomeLossFromEquityInvestments_DE42ABD8239EF253FD19A1C1599CB026" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Disposal Group, Including Discontinued Operations, Income (Loss) From Equity Investments</link:label>
    <link:loc xlink:href="ivtp-20170930.xsd#ivtp_DisposalGroupIncludingDiscontinuedOperationsIncomeLossFromEquityInvestments" xlink:label="loc_ivtp_DisposalGroupIncludingDiscontinuedOperationsIncomeLossFromEquityInvestments_DE42ABD8239EF253FD19A1C1599CB026" xlink:type="locator" />
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    <link:label id="lab_ivtp_DisposalGroupIncludingDiscontinuedOperationGainOnSaleOfInvestment_6C7A3EFBE4474A83370DA1C1599CF7AC_terseLabel_en-US" xlink:label="lab_ivtp_DisposalGroupIncludingDiscontinuedOperationGainOnSaleOfInvestment_6C7A3EFBE4474A83370DA1C1599CF7AC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gain on sale of investment in unconsolidated entity</link:label>
    <link:label id="lab_ivtp_DisposalGroupIncludingDiscontinuedOperationGainOnSaleOfInvestment_6C7A3EFBE4474A83370DA1C1599CF7AC_label_en-US" xlink:label="lab_ivtp_DisposalGroupIncludingDiscontinuedOperationGainOnSaleOfInvestment_6C7A3EFBE4474A83370DA1C1599CF7AC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disposal Group, Including Discontinued Operation, Gain On Sale Of Investment</link:label>
    <link:label id="lab_ivtp_DisposalGroupIncludingDiscontinuedOperationGainOnSaleOfInvestment_6C7A3EFBE4474A83370DA1C1599CF7AC_documentation_en-US" xlink:label="lab_ivtp_DisposalGroupIncludingDiscontinuedOperationGainOnSaleOfInvestment_6C7A3EFBE4474A83370DA1C1599CF7AC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Disposal Group, Including Discontinued Operation, Gain On Sale Of Investment</link:label>
    <link:loc xlink:href="ivtp-20170930.xsd#ivtp_DisposalGroupIncludingDiscontinuedOperationGainOnSaleOfInvestment" xlink:label="loc_ivtp_DisposalGroupIncludingDiscontinuedOperationGainOnSaleOfInvestment_6C7A3EFBE4474A83370DA1C1599CF7AC" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax_7D60136CB1079AB93BE7A1C1599C41E0_verboseLabel_en-US" xlink:label="lab_us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax_7D60136CB1079AB93BE7A1C1599C41E0" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Gain on sale of properties, net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax" xlink:label="loc_us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax_7D60136CB1079AB93BE7A1C1599C41E0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax_7D60136CB1079AB93BE7A1C1599C41E0" xlink:to="lab_us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax_7D60136CB1079AB93BE7A1C1599C41E0" xlink:type="arc" />
    <link:label id="lab_ivtp_DisposalGroupIncludingDiscontinuedOperationLossOnExtinguishmentOfDebt_F80375BB0DF6559B48E5A1C1599C77D4_negatedTerseLabel_en-US" xlink:label="lab_ivtp_DisposalGroupIncludingDiscontinuedOperationLossOnExtinguishmentOfDebt_F80375BB0DF6559B48E5A1C1599C77D4" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Loss on extinguishment of debt</link:label>
    <link:label id="lab_ivtp_DisposalGroupIncludingDiscontinuedOperationLossOnExtinguishmentOfDebt_F80375BB0DF6559B48E5A1C1599C77D4_label_en-US" xlink:label="lab_ivtp_DisposalGroupIncludingDiscontinuedOperationLossOnExtinguishmentOfDebt_F80375BB0DF6559B48E5A1C1599C77D4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disposal Group, Including Discontinued Operation, Loss On Extinguishment Of Debt</link:label>
    <link:label id="lab_ivtp_DisposalGroupIncludingDiscontinuedOperationLossOnExtinguishmentOfDebt_F80375BB0DF6559B48E5A1C1599C77D4_documentation_en-US" xlink:label="lab_ivtp_DisposalGroupIncludingDiscontinuedOperationLossOnExtinguishmentOfDebt_F80375BB0DF6559B48E5A1C1599C77D4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Disposal Group, Including Discontinued Operation, Loss On Extinguishment Of Debt</link:label>
    <link:loc xlink:href="ivtp-20170930.xsd#ivtp_DisposalGroupIncludingDiscontinuedOperationLossOnExtinguishmentOfDebt" xlink:label="loc_ivtp_DisposalGroupIncludingDiscontinuedOperationLossOnExtinguishmentOfDebt_F80375BB0DF6559B48E5A1C1599C77D4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ivtp_DisposalGroupIncludingDiscontinuedOperationLossOnExtinguishmentOfDebt_F80375BB0DF6559B48E5A1C1599C77D4" xlink:to="lab_ivtp_DisposalGroupIncludingDiscontinuedOperationLossOnExtinguishmentOfDebt_F80375BB0DF6559B48E5A1C1599C77D4" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity_1ABFE5AE38FF48298DC9A1C1599CCF0A_totalLabel_en-US" xlink:label="lab_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity_1ABFE5AE38FF48298DC9A1C1599CCF0A" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net income from discontinued operations</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity" xlink:label="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity_1ABFE5AE38FF48298DC9A1C1599CCF0A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity_1ABFE5AE38FF48298DC9A1C1599CCF0A" xlink:to="lab_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity_1ABFE5AE38FF48298DC9A1C1599CCF0A" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_0F8DE22305714686A0E68CD62BD4BD3A_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_0F8DE22305714686A0E68CD62BD4BD3A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash flows from operating activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_0F8DE22305714686A0E68CD62BD4BD3A_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_0F8DE22305714686A0E68CD62BD4BD3A" 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/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_0F8DE22305714686A0E68CD62BD4BD3A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_0F8DE22305714686A0E68CD62BD4BD3A" xlink:to="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_0F8DE22305714686A0E68CD62BD4BD3A" xlink:type="arc" />
    <link:label id="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_5C9C239A0EAF21B3441D8CD62BD4416F_terseLabel_en-US" xlink:label="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_5C9C239A0EAF21B3441D8CD62BD4416F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Adjustments to reconcile net income to net cash provided by operating activities:</link:label>
    <link:label id="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_5C9C239A0EAF21B3441D8CD62BD4416F_label_en-US" xlink:label="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_5C9C239A0EAF21B3441D8CD62BD4416F" 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/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_5C9C239A0EAF21B3441D8CD62BD4416F" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DepreciationDepletionAndAmortization_7B2ED20ED3F79E78B3348CD62BD5AE9F_terseLabel_en-US" xlink:label="lab_us-gaap_DepreciationDepletionAndAmortization_7B2ED20ED3F79E78B3348CD62BD5AE9F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Depreciation and amortization</link:label>
    <link:label id="lab_us-gaap_DepreciationDepletionAndAmortization_7B2ED20ED3F79E78B3348CD62BD5AE9F_label_en-US" xlink:label="lab_us-gaap_DepreciationDepletionAndAmortization_7B2ED20ED3F79E78B3348CD62BD5AE9F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Depreciation, Depletion and Amortization</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_7B2ED20ED3F79E78B3348CD62BD5AE9F" xlink:type="locator" />
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    <link:label id="lab_us-gaap_AmortizationOfAboveAndBelowMarketLeases_C36BDA5B1B38DAD11D848CD62BD5F469_terseLabel_en-US" xlink:label="lab_us-gaap_AmortizationOfAboveAndBelowMarketLeases_C36BDA5B1B38DAD11D848CD62BD5F469" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amortization of above and below market leases, net</link:label>
    <link:label id="lab_us-gaap_AmortizationOfAboveAndBelowMarketLeases_C36BDA5B1B38DAD11D848CD62BD5F469_label_en-US" xlink:label="lab_us-gaap_AmortizationOfAboveAndBelowMarketLeases_C36BDA5B1B38DAD11D848CD62BD5F469" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Amortization of above and below Market Leases</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AmortizationOfAboveAndBelowMarketLeases" xlink:label="loc_us-gaap_AmortizationOfAboveAndBelowMarketLeases_C36BDA5B1B38DAD11D848CD62BD5F469" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AmortizationOfAboveAndBelowMarketLeases_C36BDA5B1B38DAD11D848CD62BD5F469" xlink:to="lab_us-gaap_AmortizationOfAboveAndBelowMarketLeases_C36BDA5B1B38DAD11D848CD62BD5F469" xlink:type="arc" />
    <link:label id="lab_us-gaap_AmortizationOfDebtDiscountPremium_EEA8BA4A3D2A51B4F4AB8CD62BD57CBA_terseLabel_en-US" xlink:label="lab_us-gaap_AmortizationOfDebtDiscountPremium_EEA8BA4A3D2A51B4F4AB8CD62BD57CBA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amortization of debt premiums, discounts and financing costs</link:label>
    <link:label id="lab_us-gaap_AmortizationOfDebtDiscountPremium_EEA8BA4A3D2A51B4F4AB8CD62BD57CBA_label_en-US" xlink:label="lab_us-gaap_AmortizationOfDebtDiscountPremium_EEA8BA4A3D2A51B4F4AB8CD62BD57CBA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Amortization of Debt Discount (Premium)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AmortizationOfDebtDiscountPremium" xlink:label="loc_us-gaap_AmortizationOfDebtDiscountPremium_EEA8BA4A3D2A51B4F4AB8CD62BD57CBA" xlink:type="locator" />
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    <link:label id="lab_us-gaap_StraightLineRent_38AEEC4147EA451196928CD62BD54FFE_negatedLabel_en-US" xlink:label="lab_us-gaap_StraightLineRent_38AEEC4147EA451196928CD62BD54FFE" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Straight-line rental income</link:label>
    <link:label id="lab_us-gaap_StraightLineRent_38AEEC4147EA451196928CD62BD54FFE_label_en-US" xlink:label="lab_us-gaap_StraightLineRent_38AEEC4147EA451196928CD62BD54FFE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Straight Line Rent</link:label>
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    <link:label id="lab_ivtp_ProvisionforAssetImpairment_64B833FE3FA53914278D8CD62BD53F75_verboseLabel_en-US" xlink:label="lab_ivtp_ProvisionforAssetImpairment_64B833FE3FA53914278D8CD62BD53F75" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Provision for asset impairment</link:label>
    <link:label id="lab_ivtp_ProvisionforAssetImpairment_64B833FE3FA53914278D8CD62BD53F75_label_en-US" xlink:label="lab_ivtp_ProvisionforAssetImpairment_64B833FE3FA53914278D8CD62BD53F75" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Provision for Asset Impairment</link:label>
    <link:label id="lab_ivtp_ProvisionforAssetImpairment_64B833FE3FA53914278D8CD62BD53F75_documentation_en-US" xlink:label="lab_ivtp_ProvisionforAssetImpairment_64B833FE3FA53914278D8CD62BD53F75" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The charge against earnings resulting from the aggregate write down of assets from their carrying value to their fair value.  Includes charges from both continued and discontinued operations.</link:label>
    <link:loc xlink:href="ivtp-20170930.xsd#ivtp_ProvisionforAssetImpairment" xlink:label="loc_ivtp_ProvisionforAssetImpairment_64B833FE3FA53914278D8CD62BD53F75" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ivtp_ProvisionforAssetImpairment_64B833FE3FA53914278D8CD62BD53F75" xlink:to="lab_ivtp_ProvisionforAssetImpairment_64B833FE3FA53914278D8CD62BD53F75" xlink:type="arc" />
    <link:label id="lab_us-gaap_GainLossOnSaleOfProperties_FAC1A39E8955C159656B8CD62BD57B77_negatedLabel_en-US" xlink:label="lab_us-gaap_GainLossOnSaleOfProperties_FAC1A39E8955C159656B8CD62BD57B77" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Gain on sale of investment properties, net</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsToAcquireIntangibleAssets" xlink:label="loc_us-gaap_PaymentsToAcquireIntangibleAssets_BB6313CAD4340E6967198CD62BD681F4" xlink:type="locator" />
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    <link:label id="lab_us-gaap_PaymentsForCapitalImprovements_6EA7F895AF13EEEC810B8CD62BD6C40C_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsForCapitalImprovements_6EA7F895AF13EEEC810B8CD62BD6C40C" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Capital expenditures and tenant improvements</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsForCapitalImprovements" xlink:label="loc_us-gaap_PaymentsForCapitalImprovements_6EA7F895AF13EEEC810B8CD62BD6C40C" xlink:type="locator" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsToDevelopRealEstateAssets" xlink:label="loc_us-gaap_PaymentsToDevelopRealEstateAssets_5A7E5CC65866B70851498CD62BD6D87B" xlink:type="locator" />
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    <link:label id="lab_ivtp_EquityMethodInvestmentDividendsOrDistributionsReturnOfInvestment_F61D93556A19ED20297F8CD62BD63E94_terseLabel_en-US" xlink:label="lab_ivtp_EquityMethodInvestmentDividendsOrDistributionsReturnOfInvestment_F61D93556A19ED20297F8CD62BD63E94" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Distributions from unconsolidated entities</link:label>
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    <link:loc xlink:href="ivtp-20170930.xsd#ivtp_EquityMethodInvestmentDividendsOrDistributionsReturnOfInvestment" xlink:label="loc_ivtp_EquityMethodInvestmentDividendsOrDistributionsReturnOfInvestment_F61D93556A19ED20297F8CD62BD63E94" xlink:type="locator" />
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    <link:label id="lab_ivtp_IncreaseDecreaseinLeaseAcquisitionCostsandFranchiseFees_DC5BE1CF6C0EA26A20A58CD62BD6693D_negatedLabel_en-US" xlink:label="lab_ivtp_IncreaseDecreaseinLeaseAcquisitionCostsandFranchiseFees_DC5BE1CF6C0EA26A20A58CD62BD6693D" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Lease commissions and other leasing costs</link:label>
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    <link:label id="lab_us-gaap_PaymentsForProceedsFromProductiveAssets_105C1E681986FF205A398CD62BD65C5C_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromProductiveAssets_105C1E681986FF205A398CD62BD65C5C" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Other assets</link:label>
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    <link:label id="lab_ivtp_IncreaseDecreaseinTenderOfferPurchasePrice_B4D24F9A1305CAF4EE2A8CD62BD61633_terseLabel_en-US" xlink:label="lab_ivtp_IncreaseDecreaseinTenderOfferPurchasePrice_B4D24F9A1305CAF4EE2A8CD62BD61633" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Refund of excess funds associated with 2016 tender offer</link:label>
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    <link:label id="lab_ivtp_IncreaseDecreaseinTenderOfferPurchasePrice_B4D24F9A1305CAF4EE2A8CD62BD61633_documentation_en-US" xlink:label="lab_ivtp_IncreaseDecreaseinTenderOfferPurchasePrice_B4D24F9A1305CAF4EE2A8CD62BD61633" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Tender Offer Purchase Price</link:label>
    <link:loc xlink:href="ivtp-20170930.xsd#ivtp_IncreaseDecreaseinTenderOfferPurchasePrice" xlink:label="loc_ivtp_IncreaseDecreaseinTenderOfferPurchasePrice_B4D24F9A1305CAF4EE2A8CD62BD61633" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfSecuredDebt_D25A86DD6021C1F7B6B98CD62BD63889_verboseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfSecuredDebt_D25A86DD6021C1F7B6B98CD62BD63889" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from debt</link:label>
    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfSecuredDebt_D25A86DD6021C1F7B6B98CD62BD63889_label_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfSecuredDebt_D25A86DD6021C1F7B6B98CD62BD63889" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Issuance of Secured Debt</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromIssuanceOfSecuredDebt" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfSecuredDebt_D25A86DD6021C1F7B6B98CD62BD63889" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromIssuanceOfSecuredDebt_D25A86DD6021C1F7B6B98CD62BD63889" xlink:to="lab_us-gaap_ProceedsFromIssuanceOfSecuredDebt_D25A86DD6021C1F7B6B98CD62BD63889" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromRepaymentsOfSecuredDebt_1CC4DF76482E129784A78CD62BD6D9D5_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromRepaymentsOfSecuredDebt_1CC4DF76482E129784A78CD62BD6D9D5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Payoffs of debt</link:label>
    <link:label id="lab_us-gaap_ProceedsFromRepaymentsOfSecuredDebt_1CC4DF76482E129784A78CD62BD6D9D5_label_en-US" xlink:label="lab_us-gaap_ProceedsFromRepaymentsOfSecuredDebt_1CC4DF76482E129784A78CD62BD6D9D5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from (Repayments of) Secured Debt</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromRepaymentsOfSecuredDebt" xlink:label="loc_us-gaap_ProceedsFromRepaymentsOfSecuredDebt_1CC4DF76482E129784A78CD62BD6D9D5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromRepaymentsOfSecuredDebt_1CC4DF76482E129784A78CD62BD6D9D5" xlink:to="lab_us-gaap_ProceedsFromRepaymentsOfSecuredDebt_1CC4DF76482E129784A78CD62BD6D9D5" xlink:type="arc" />
    <link:label id="lab_us-gaap_RepaymentsOfSecuredDebt_03DA95070E30C931FDD58CD62BD7AFB4_negatedLabel_en-US" xlink:label="lab_us-gaap_RepaymentsOfSecuredDebt_03DA95070E30C931FDD58CD62BD7AFB4" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Principal payments of mortgage debt</link:label>
    <link:label id="lab_us-gaap_RepaymentsOfSecuredDebt_03DA95070E30C931FDD58CD62BD7AFB4_label_en-US" xlink:label="lab_us-gaap_RepaymentsOfSecuredDebt_03DA95070E30C931FDD58CD62BD7AFB4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Repayments of Secured Debt</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RepaymentsOfSecuredDebt" xlink:label="loc_us-gaap_RepaymentsOfSecuredDebt_03DA95070E30C931FDD58CD62BD7AFB4" xlink:type="locator" />
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    <link:label id="lab_us-gaap_PaymentsOfLoanCosts_424F113EE35679B117888CD62BD7CB87_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfLoanCosts_424F113EE35679B117888CD62BD7CB87" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Payment of loan fees and deposits</link:label>
    <link:label id="lab_us-gaap_PaymentsOfLoanCosts_424F113EE35679B117888CD62BD7CB87_label_en-US" xlink:label="lab_us-gaap_PaymentsOfLoanCosts_424F113EE35679B117888CD62BD7CB87" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments of Loan Costs</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsOfLoanCosts" xlink:label="loc_us-gaap_PaymentsOfLoanCosts_424F113EE35679B117888CD62BD7CB87" xlink:type="locator" />
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    <link:label id="lab_ivtp_ContributionOfCashToSpinoff_C77A2FA6A4FC4D76DD628CD62BD70809_negatedTerseLabel_en-US" xlink:label="lab_ivtp_ContributionOfCashToSpinoff_C77A2FA6A4FC4D76DD628CD62BD70809" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Cash contributed to Highlands REIT, Inc.</link:label>
    <link:label id="lab_ivtp_ContributionOfCashToSpinoff_C77A2FA6A4FC4D76DD628CD62BD70809_label_en-US" xlink:label="lab_ivtp_ContributionOfCashToSpinoff_C77A2FA6A4FC4D76DD628CD62BD70809" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contribution Of Cash To Spinoff</link:label>
    <link:label id="lab_ivtp_ContributionOfCashToSpinoff_C77A2FA6A4FC4D76DD628CD62BD70809_documentation_en-US" xlink:label="lab_ivtp_ContributionOfCashToSpinoff_C77A2FA6A4FC4D76DD628CD62BD70809" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Contribution Of Cash To Spinoff</link:label>
    <link:loc xlink:href="ivtp-20170930.xsd#ivtp_ContributionOfCashToSpinoff" xlink:label="loc_ivtp_ContributionOfCashToSpinoff_C77A2FA6A4FC4D76DD628CD62BD70809" xlink:type="locator" />
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_23FAFA0BED92997BE66B8CD62BD71C30_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_23FAFA0BED92997BE66B8CD62BD71C30" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash used in financing activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_23FAFA0BED92997BE66B8CD62BD71C30_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_23FAFA0BED92997BE66B8CD62BD71C30" 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/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_23FAFA0BED92997BE66B8CD62BD71C30" xlink:type="locator" />
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    <link:label id="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_9B2F8E54E8FA96F2E89B8CD62BD7BF8C_totalLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_9B2F8E54E8FA96F2E89B8CD62BD7BF8C" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net (decrease) increase in cash and cash equivalents</link:label>
    <link:label id="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_9B2F8E54E8FA96F2E89B8CD62BD7BF8C_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_9B2F8E54E8FA96F2E89B8CD62BD7BF8C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash and Cash Equivalents, Period Increase (Decrease)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_9B2F8E54E8FA96F2E89B8CD62BD7BF8C" xlink:type="locator" />
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    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations_0FDA8A76241C2DACEC798CD62BD7DC7A_periodStartLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations_0FDA8A76241C2DACEC798CD62BD7DC7A" 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_CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations_0FDA8A76241C2DACEC798CD62BD7DC7A_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations_0FDA8A76241C2DACEC798CD62BD7DC7A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash and Cash Equivalents, at Carrying Value, Including Discontinued Operations</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValueIncludingDiscontinuedOperations_0FDA8A76241C2DACEC798CD62BD7DC7A" xlink:type="locator" />
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    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_7E5E229D615D633829228CD62BD7A1B7_periodEndLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_7E5E229D615D633829228CD62BD7A1B7" 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>
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    <link:label id="lab_us-gaap_SupplementalCashFlowInformationAbstract_C0EA22D6280BCBCF0F678CD62BD71B59_terseLabel_en-US" xlink:label="lab_us-gaap_SupplementalCashFlowInformationAbstract_C0EA22D6280BCBCF0F678CD62BD71B59" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Supplemental disclosure of cash flow information</link:label>
    <link:label id="lab_us-gaap_SupplementalCashFlowInformationAbstract_C0EA22D6280BCBCF0F678CD62BD71B59_label_en-US" xlink:label="lab_us-gaap_SupplementalCashFlowInformationAbstract_C0EA22D6280BCBCF0F678CD62BD71B59" 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/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SupplementalCashFlowInformationAbstract" xlink:label="loc_us-gaap_SupplementalCashFlowInformationAbstract_C0EA22D6280BCBCF0F678CD62BD71B59" xlink:type="locator" />
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    <link:label id="lab_us-gaap_InterestPaidNet_7029F77146A8D42C289C8CD62BD7ED41_terseLabel_en-US" xlink:label="lab_us-gaap_InterestPaidNet_7029F77146A8D42C289C8CD62BD7ED41" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash paid for interest, net of capitalized interest of $0 and $1,147</link:label>
    <link:label id="lab_us-gaap_InterestPaidNet_7029F77146A8D42C289C8CD62BD7ED41_label_en-US" xlink:label="lab_us-gaap_InterestPaidNet_7029F77146A8D42C289C8CD62BD7ED41" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Paid, Net</link:label>
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    <link:label id="lab_us-gaap_IncomeTaxesPaidNet_FB41460858DA4735F1CB8CD62BD73A3B_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxesPaidNet_FB41460858DA4735F1CB8CD62BD73A3B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash paid for income taxes, net of refunds of $509 and $1,344</link:label>
    <link:label id="lab_us-gaap_IncomeTaxesPaidNet_FB41460858DA4735F1CB8CD62BD73A3B_label_en-US" xlink:label="lab_us-gaap_IncomeTaxesPaidNet_FB41460858DA4735F1CB8CD62BD73A3B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Taxes Paid, Net</link:label>
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    <link:label id="lab_ivtp_NetAssetsTransferredatSaleofRealEstateInvestments_F8E50C325DD76691B06C8CD62BD8719F_terseLabel_en-US" xlink:label="lab_ivtp_NetAssetsTransferredatSaleofRealEstateInvestments_F8E50C325DD76691B06C8CD62BD8719F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net assets transferred at sale of real estate investments</link:label>
    <link:label id="lab_ivtp_NetAssetsTransferredatSaleofRealEstateInvestments_F8E50C325DD76691B06C8CD62BD8719F_label_en-US" xlink:label="lab_ivtp_NetAssetsTransferredatSaleofRealEstateInvestments_F8E50C325DD76691B06C8CD62BD8719F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Assets Transferred at Sale of Real Estate Investments</link:label>
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    <link:label id="lab_us-gaap_NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired1_69773B4996AA7AAFB0588CD62BD84863_terseLabel_en-US" xlink:label="lab_us-gaap_NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired1_69773B4996AA7AAFB0588CD62BD84863" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net assets acquired at purchase of real estate investments</link:label>
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    <link:label id="lab_us-gaap_TransferOfOtherRealEstate_F9EAE583793A313634E58CD62BD9CB00_terseLabel_en-US" xlink:label="lab_us-gaap_TransferOfOtherRealEstate_F9EAE583793A313634E58CD62BD9CB00" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Property surrendered in extinguishment of debt</link:label>
    <link:label id="lab_us-gaap_TransferOfOtherRealEstate_F9EAE583793A313634E58CD62BD9CB00_label_en-US" xlink:label="lab_us-gaap_TransferOfOtherRealEstate_F9EAE583793A313634E58CD62BD9CB00" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Real Estate Owned, Transfer from Real Estate Owned</link:label>
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    <link:label id="lab_us-gaap_EscrowDepositsRelatedToPropertySales_C1F373086C90B7DA2F678CD62BD98985_terseLabel_en-US" xlink:label="lab_us-gaap_EscrowDepositsRelatedToPropertySales_C1F373086C90B7DA2F678CD62BD98985" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Assumption of lender held escrows through acquisition of investment property</link:label>
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    <link:label id="lab_ivtp_NetAssetsDistributedToSpinoff_77B588AFB1EC431AAA288CD62BD96008_terseLabel_en-US" xlink:label="lab_ivtp_NetAssetsDistributedToSpinoff_77B588AFB1EC431AAA288CD62BD96008" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net equity distributed to Highlands REIT, Inc. (net of cash contributed)</link:label>
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    <link:label id="lab_ivtp_MortgagesAssumedByBuyerUponDispositionOfProperty_C3924D26BEFF0C33D5678CD62BD93594_terseLabel_en-US" xlink:label="lab_ivtp_MortgagesAssumedByBuyerUponDispositionOfProperty_C3924D26BEFF0C33D5678CD62BD93594" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Mortgage assumed by buyer through disposition of investment properties</link:label>
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    <link:loc xlink:href="ivtp-20170930.xsd#ivtp_MortgagesAssumedByBuyerUponDispositionOfProperty" xlink:label="loc_ivtp_MortgagesAssumedByBuyerUponDispositionOfProperty_C3924D26BEFF0C33D5678CD62BD93594" xlink:type="locator" />
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    <link:label id="lab_ivtp_LikeKindExchangeOfRealEstateAbstract_D043FA54810E1B33635F8CD62BD9C57E_terseLabel_en-US" xlink:label="lab_ivtp_LikeKindExchangeOfRealEstateAbstract_D043FA54810E1B33635F8CD62BD9C57E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Like-kind exchange of real estate:</link:label>
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    <link:label id="lab_ivtp_RestrictedCashFromPurchaseofInvestmentProperties_D6EDB120179CAE6F09C68CD62BD9BD32_terseLabel_en-US" xlink:label="lab_ivtp_RestrictedCashFromPurchaseofInvestmentProperties_D6EDB120179CAE6F09C68CD62BD9BD32" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Restricted cash used in purchase of investment properties</link:label>
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    <link:label id="lab_ivtp_RestrictedCashProceedsFromSaleOfInvestmentProperties_A88952B0E35733A769638CD62BD94057_terseLabel_en-US" xlink:label="lab_ivtp_RestrictedCashProceedsFromSaleOfInvestmentProperties_A88952B0E35733A769638CD62BD94057" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Restricted cash proceeds from sale of investment properties</link:label>
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    <link:label id="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisAbstract_48FED83BA9E7EC34482F9E23EBBCD9D9_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisAbstract_48FED83BA9E7EC34482F9E23EBBCD9D9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]</link:label>
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    <link:label id="lab_us-gaap_RealEstateMember_4727874492971EF7C10F9E23EBBCEA85_terseLabel_en-US" xlink:label="lab_us-gaap_RealEstateMember_4727874492971EF7C10F9E23EBBCEA85" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Real Estate</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfRealEstatePropertiesTable" xlink:label="loc_us-gaap_ScheduleOfRealEstatePropertiesTable_73C4E5B754348BCFA8F350A0F0556271" xlink:type="locator" />
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    <link:label id="lab_ivtp_CampusMarketplaceSanMarcosCAMember_153DB2AB28ADF0DAA14D50A0F05544BC_terseLabel_en-US" xlink:label="lab_ivtp_CampusMarketplaceSanMarcosCAMember_153DB2AB28ADF0DAA14D50A0F05544BC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Campus Marketplace, San Marcos, CA</link:label>
    <link:label id="lab_ivtp_CampusMarketplaceSanMarcosCAMember_153DB2AB28ADF0DAA14D50A0F05544BC_label_en-US" xlink:label="lab_ivtp_CampusMarketplaceSanMarcosCAMember_153DB2AB28ADF0DAA14D50A0F05544BC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Campus Marketplace, San Marcos, CA [Member]</link:label>
    <link:label id="lab_ivtp_CampusMarketplaceSanMarcosCAMember_153DB2AB28ADF0DAA14D50A0F05544BC_documentation_en-US" xlink:label="lab_ivtp_CampusMarketplaceSanMarcosCAMember_153DB2AB28ADF0DAA14D50A0F05544BC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Campus Marketplace, San Marcos, CA [Member]</link:label>
    <link:loc xlink:href="ivtp-20170930.xsd#ivtp_CampusMarketplaceSanMarcosCAMember" xlink:label="loc_ivtp_CampusMarketplaceSanMarcosCAMember_153DB2AB28ADF0DAA14D50A0F05544BC" xlink:type="locator" />
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    <link:label id="lab_ivtp_ParaisoParcandWestforkPlazaPembrokePinesFLMember_D8BAEE62D1E51B71B30F50A0F055EE9E_terseLabel_en-US" xlink:label="lab_ivtp_ParaisoParcandWestforkPlazaPembrokePinesFLMember_D8BAEE62D1E51B71B30F50A0F055EE9E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Paraiso Parc and Westfork Plaza, Pembroke Pines, FL</link:label>
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    <link:label id="lab_ivtp_ParaisoParcandWestforkPlazaPembrokePinesFLMember_D8BAEE62D1E51B71B30F50A0F055EE9E_documentation_en-US" xlink:label="lab_ivtp_ParaisoParcandWestforkPlazaPembrokePinesFLMember_D8BAEE62D1E51B71B30F50A0F055EE9E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Paraiso Parc and Westfork Plaza, Pembroke Pines, FL [Member]</link:label>
    <link:loc xlink:href="ivtp-20170930.xsd#ivtp_ParaisoParcandWestforkPlazaPembrokePinesFLMember" xlink:label="loc_ivtp_ParaisoParcandWestforkPlazaPembrokePinesFLMember_D8BAEE62D1E51B71B30F50A0F055EE9E" xlink:type="locator" />
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    <link:label id="lab_ivtp_TheShopsatTownCenterGermantownMDMember_5E168737091CA4CE7BCC50A0F055B336_terseLabel_en-US" xlink:label="lab_ivtp_TheShopsatTownCenterGermantownMDMember_5E168737091CA4CE7BCC50A0F055B336" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">The Shops at Town Center, Germantown, MD</link:label>
    <link:label id="lab_ivtp_TheShopsatTownCenterGermantownMDMember_5E168737091CA4CE7BCC50A0F055B336_label_en-US" xlink:label="lab_ivtp_TheShopsatTownCenterGermantownMDMember_5E168737091CA4CE7BCC50A0F055B336" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">The Shops at Town Center, Germantown, MD [Member]</link:label>
    <link:label id="lab_ivtp_TheShopsatTownCenterGermantownMDMember_5E168737091CA4CE7BCC50A0F055B336_documentation_en-US" xlink:label="lab_ivtp_TheShopsatTownCenterGermantownMDMember_5E168737091CA4CE7BCC50A0F055B336" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The Shops at Town Center, Germantown, MD [Member]</link:label>
    <link:loc xlink:href="ivtp-20170930.xsd#ivtp_TheShopsatTownCenterGermantownMDMember" xlink:label="loc_ivtp_TheShopsatTownCenterGermantownMDMember_5E168737091CA4CE7BCC50A0F055B336" xlink:type="locator" />
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    <link:label id="lab_ivtp_CaryParkTownCenterCaryNCMember_E19CA8B1E53A0A96490B50A0F05512FD_terseLabel_en-US" xlink:label="lab_ivtp_CaryParkTownCenterCaryNCMember_E19CA8B1E53A0A96490B50A0F05512FD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cary Park Town Center, Cary, NC</link:label>
    <link:label id="lab_ivtp_CaryParkTownCenterCaryNCMember_E19CA8B1E53A0A96490B50A0F05512FD_label_en-US" xlink:label="lab_ivtp_CaryParkTownCenterCaryNCMember_E19CA8B1E53A0A96490B50A0F05512FD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cary Park Town Center, Cary, NC [Member]</link:label>
    <link:label id="lab_ivtp_CaryParkTownCenterCaryNCMember_E19CA8B1E53A0A96490B50A0F05512FD_documentation_en-US" xlink:label="lab_ivtp_CaryParkTownCenterCaryNCMember_E19CA8B1E53A0A96490B50A0F05512FD" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Cary Park Town Center, Cary, NC [Member]</link:label>
    <link:loc xlink:href="ivtp-20170930.xsd#ivtp_CaryParkTownCenterCaryNCMember" xlink:label="loc_ivtp_CaryParkTownCenterCaryNCMember_E19CA8B1E53A0A96490B50A0F05512FD" xlink:type="locator" />
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    <link:label id="lab_ivtp_TheParkeCedarParkTXMember_CC6AED4F6AD835C15A7C50A0F05568FB_terseLabel_en-US" xlink:label="lab_ivtp_TheParkeCedarParkTXMember_CC6AED4F6AD835C15A7C50A0F05568FB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">The Parke, Cedar Park, TX</link:label>
    <link:loc xlink:href="ivtp-20170930.xsd#ivtp_TheParkeCedarParkTXMember" xlink:label="loc_ivtp_TheParkeCedarParkTXMember_CC6AED4F6AD835C15A7C50A0F05568FB" xlink:type="locator" />
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    <link:label id="lab_ivtp_RiverOaksSantaClaritaCAMember_88F790C76A27A193859150A0F0560FCE_terseLabel_en-US" xlink:label="lab_ivtp_RiverOaksSantaClaritaCAMember_88F790C76A27A193859150A0F0560FCE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">River Oaks, Santa Clarita, CA</link:label>
    <link:label id="lab_ivtp_RiverOaksSantaClaritaCAMember_88F790C76A27A193859150A0F0560FCE_label_en-US" xlink:label="lab_ivtp_RiverOaksSantaClaritaCAMember_88F790C76A27A193859150A0F0560FCE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">River Oaks, Santa Clarita, CA [Member]</link:label>
    <link:label id="lab_ivtp_RiverOaksSantaClaritaCAMember_88F790C76A27A193859150A0F0560FCE_documentation_en-US" xlink:label="lab_ivtp_RiverOaksSantaClaritaCAMember_88F790C76A27A193859150A0F0560FCE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">River Oaks, Santa Clarita, CA [Member]</link:label>
    <link:loc xlink:href="ivtp-20170930.xsd#ivtp_RiverOaksSantaClaritaCAMember" xlink:label="loc_ivtp_RiverOaksSantaClaritaCAMember_88F790C76A27A193859150A0F0560FCE" xlink:type="locator" />
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    <link:label id="lab_ivtp_KyleMarketplaceKyleTXMember_12B20A097E811433B39350A0F0561280_terseLabel_en-US" xlink:label="lab_ivtp_KyleMarketplaceKyleTXMember_12B20A097E811433B39350A0F0561280" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Kyle Marketplace, Kyle, TX</link:label>
    <link:label id="lab_ivtp_KyleMarketplaceKyleTXMember_12B20A097E811433B39350A0F0561280_label_en-US" xlink:label="lab_ivtp_KyleMarketplaceKyleTXMember_12B20A097E811433B39350A0F0561280" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Kyle Marketplace, Kyle, TX [Member]</link:label>
    <link:label id="lab_ivtp_KyleMarketplaceKyleTXMember_12B20A097E811433B39350A0F0561280_documentation_en-US" xlink:label="lab_ivtp_KyleMarketplaceKyleTXMember_12B20A097E811433B39350A0F0561280" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Kyle Marketplace, Kyle, TX [Member]</link:label>
    <link:loc xlink:href="ivtp-20170930.xsd#ivtp_KyleMarketplaceKyleTXMember" xlink:label="loc_ivtp_KyleMarketplaceKyleTXMember_12B20A097E811433B39350A0F0561280" xlink:type="locator" />
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    <link:label id="lab_ivtp_ShopsatGalleriaHoustonTXMember_794648B9D5E43F897D3C50A0F0563087_terseLabel_en-US" xlink:label="lab_ivtp_ShopsatGalleriaHoustonTXMember_794648B9D5E43F897D3C50A0F0563087" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Shops at Galleria Houston, TX</link:label>
    <link:label id="lab_ivtp_ShopsatGalleriaHoustonTXMember_794648B9D5E43F897D3C50A0F0563087_label_en-US" xlink:label="lab_ivtp_ShopsatGalleriaHoustonTXMember_794648B9D5E43F897D3C50A0F0563087" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Shops at Galleria Houston, TX [Member]</link:label>
    <link:label id="lab_ivtp_ShopsatGalleriaHoustonTXMember_794648B9D5E43F897D3C50A0F0563087_documentation_en-US" xlink:label="lab_ivtp_ShopsatGalleriaHoustonTXMember_794648B9D5E43F897D3C50A0F0563087" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Shops at Galleria Houston, TX [Member]</link:label>
    <link:loc xlink:href="ivtp-20170930.xsd#ivtp_ShopsatGalleriaHoustonTXMember" xlink:label="loc_ivtp_ShopsatGalleriaHoustonTXMember_794648B9D5E43F897D3C50A0F0563087" xlink:type="locator" />
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    <link:label id="lab_ivtp_RenaissanceCenterDurhamNCMember_935F3C3E120F7A5B082B50A0F056B269_terseLabel_en-US" xlink:label="lab_ivtp_RenaissanceCenterDurhamNCMember_935F3C3E120F7A5B082B50A0F056B269" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Renaissance Center Durham, NC</link:label>
    <link:label id="lab_ivtp_RenaissanceCenterDurhamNCMember_935F3C3E120F7A5B082B50A0F056B269_label_en-US" xlink:label="lab_ivtp_RenaissanceCenterDurhamNCMember_935F3C3E120F7A5B082B50A0F056B269" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Renaissance Center Durham, NC [Member]</link:label>
    <link:label id="lab_ivtp_RenaissanceCenterDurhamNCMember_935F3C3E120F7A5B082B50A0F056B269_documentation_en-US" xlink:label="lab_ivtp_RenaissanceCenterDurhamNCMember_935F3C3E120F7A5B082B50A0F056B269" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Renaissance Center Durham, NC [Member]</link:label>
    <link:loc xlink:href="ivtp-20170930.xsd#ivtp_RenaissanceCenterDurhamNCMember" xlink:label="loc_ivtp_RenaissanceCenterDurhamNCMember_935F3C3E120F7A5B082B50A0F056B269" xlink:type="locator" />
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    <link:label id="lab_ivtp_StevensonRanchStevensonRanchCAMember_EA300B0245FEE242F0B050A0F056B4F5_terseLabel_en-US" xlink:label="lab_ivtp_StevensonRanchStevensonRanchCAMember_EA300B0245FEE242F0B050A0F056B4F5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stevenson Ranch, Stevenson Ranch, CA</link:label>
    <link:label id="lab_ivtp_StevensonRanchStevensonRanchCAMember_EA300B0245FEE242F0B050A0F056B4F5_label_en-US" xlink:label="lab_ivtp_StevensonRanchStevensonRanchCAMember_EA300B0245FEE242F0B050A0F056B4F5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stevenson Ranch, Stevenson Ranch, CA [Member]</link:label>
    <link:label id="lab_ivtp_StevensonRanchStevensonRanchCAMember_EA300B0245FEE242F0B050A0F056B4F5_documentation_en-US" xlink:label="lab_ivtp_StevensonRanchStevensonRanchCAMember_EA300B0245FEE242F0B050A0F056B4F5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Stevenson Ranch, Stevenson Ranch, CA [Member]</link:label>
    <link:loc xlink:href="ivtp-20170930.xsd#ivtp_StevensonRanchStevensonRanchCAMember" xlink:label="loc_ivtp_StevensonRanchStevensonRanchCAMember_EA300B0245FEE242F0B050A0F056B4F5" xlink:type="locator" />
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    <link:label id="lab_ivtp_ThePointeAtCreedmooreRaleighNCMember_F7BB8D9B43CB4BF2FFA650A0F0565C24_terseLabel_en-US" xlink:label="lab_ivtp_ThePointeAtCreedmooreRaleighNCMember_F7BB8D9B43CB4BF2FFA650A0F0565C24" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">The Pointe At Creedmoore, Raleigh, NC</link:label>
    <link:label id="lab_ivtp_ThePointeAtCreedmooreRaleighNCMember_F7BB8D9B43CB4BF2FFA650A0F0565C24_label_en-US" xlink:label="lab_ivtp_ThePointeAtCreedmooreRaleighNCMember_F7BB8D9B43CB4BF2FFA650A0F0565C24" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">The Pointe At Creedmoore, Raleigh, NC [Member]</link:label>
    <link:label id="lab_ivtp_ThePointeAtCreedmooreRaleighNCMember_F7BB8D9B43CB4BF2FFA650A0F0565C24_documentation_en-US" xlink:label="lab_ivtp_ThePointeAtCreedmooreRaleighNCMember_F7BB8D9B43CB4BF2FFA650A0F0565C24" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The Pointe At Creedmoore, Raleigh, NC [Member]</link:label>
    <link:loc xlink:href="ivtp-20170930.xsd#ivtp_ThePointeAtCreedmooreRaleighNCMember" xlink:label="loc_ivtp_ThePointeAtCreedmooreRaleighNCMember_F7BB8D9B43CB4BF2FFA650A0F0565C24" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ivtp_ThePointeAtCreedmooreRaleighNCMember_F7BB8D9B43CB4BF2FFA650A0F0565C24" xlink:to="lab_ivtp_ThePointeAtCreedmooreRaleighNCMember_F7BB8D9B43CB4BF2FFA650A0F0565C24" xlink:type="arc" />
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