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    <link:label id="lab_fr_OtherRealEstatePartnershipMember_C74153FEF97E35B7249EE3BE1D5106F6_terseLabel_en-US" xlink:label="lab_fr_OtherRealEstatePartnershipMember_B47797A763E355D2AE0DE5E0577B07F6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Real Estate Partnerships</link:label>
    <link:label id="lab_fr_OtherRealEstatePartnershipMember_C74153FEF97E35B7249EE3BE1D5106F6_label_en-US" xlink:label="lab_fr_OtherRealEstatePartnershipMember_B47797A763E355D2AE0DE5E0577B07F6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Real Estate Partnership [Member]</link:label>
    <link:label id="lab_fr_OtherRealEstatePartnershipMember_C74153FEF97E35B7249EE3BE1D5106F6_documentation_en-US" xlink:label="lab_fr_OtherRealEstatePartnershipMember_B47797A763E355D2AE0DE5E0577B07F6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Other real estate partnership.</link:label>
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    <link:label id="lab_fr_JointVentureMember_79A7A77E8E9D3165C8DFE3BE1D510B41_terseLabel_en-US" xlink:label="lab_fr_JointVentureMember_76DF8136CBDD503EA9CFB4E578BB7E2F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Joint Venture</link:label>
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    <link:label id="lab_fr_JointVentureMember_79A7A77E8E9D3165C8DFE3BE1D510B41_documentation_en-US" xlink:label="lab_fr_JointVentureMember_76DF8136CBDD503EA9CFB4E578BB7E2F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Joint Venture [Member]</link:label>
    <link:loc xlink:href="fr-20191231.xsd#fr_JointVentureMember" xlink:label="loc_fr_JointVentureMember_76DF8136CBDD503EA9CFB4E578BB7E2F" xlink:type="locator" />
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    <link:label id="lab_fr_OrganizationAndFormationOfCompanyLineItems_A2C58C9F12D528E1F82FE3BE1D51B87E_terseLabel_en-US" xlink:label="lab_fr_OrganizationAndFormationOfCompanyLineItems_F2D336C7714255F29E64B7050F5D121E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Organization [Line Items]</link:label>
    <link:label id="lab_fr_OrganizationAndFormationOfCompanyLineItems_A2C58C9F12D528E1F82FE3BE1D51B87E_label_en-US" xlink:label="lab_fr_OrganizationAndFormationOfCompanyLineItems_F2D336C7714255F29E64B7050F5D121E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Organization And Formation Of Company [Line Items]</link:label>
    <link:label id="lab_fr_OrganizationAndFormationOfCompanyLineItems_A2C58C9F12D528E1F82FE3BE1D51B87E_documentation_en-US" xlink:label="lab_fr_OrganizationAndFormationOfCompanyLineItems_F2D336C7714255F29E64B7050F5D121E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Organization And Formation Of Company [Line Items]</link:label>
    <link:loc xlink:href="fr-20191231.xsd#fr_OrganizationAndFormationOfCompanyLineItems" xlink:label="loc_fr_OrganizationAndFormationOfCompanyLineItems_F2D336C7714255F29E64B7050F5D121E" xlink:type="locator" />
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    <link:label id="lab_us-gaap_MinorityInterestOwnershipPercentageByParent_E09387491518976119D4E3BE1D518453_terseLabel_en-US" xlink:label="lab_us-gaap_MinorityInterestOwnershipPercentageByParent_46EE12BB37075813A8AE882051967A51" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Company's ownership interest</link:label>
    <link:label id="lab_us-gaap_MinorityInterestOwnershipPercentageByParent_E09387491518976119D4E3BE1D518453_label_en-US" xlink:label="lab_us-gaap_MinorityInterestOwnershipPercentageByParent_46EE12BB37075813A8AE882051967A51" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Noncontrolling Interest, Ownership Percentage by Parent</link:label>
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    <link:label id="lab_fr_NumberOfLimitedPartnership_71E914B1CCA7B78D030AE3BE1D52C20E_terseLabel_en-US" xlink:label="lab_fr_NumberOfLimitedPartnership_81D8B1086EE756959B010C8A9020CEF4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of Other Real Estate Partnerships</link:label>
    <link:label id="lab_fr_NumberOfLimitedPartnership_71E914B1CCA7B78D030AE3BE1D52C20E_label_en-US" xlink:label="lab_fr_NumberOfLimitedPartnership_81D8B1086EE756959B010C8A9020CEF4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">NumberOfLimitedPartnership</link:label>
    <link:label id="lab_fr_NumberOfLimitedPartnership_71E914B1CCA7B78D030AE3BE1D52C20E_documentation_en-US" xlink:label="lab_fr_NumberOfLimitedPartnership_81D8B1086EE756959B010C8A9020CEF4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Number of limited partnerships.</link:label>
    <link:loc xlink:href="fr-20191231.xsd#fr_NumberOfLimitedPartnership" xlink:label="loc_fr_NumberOfLimitedPartnership_81D8B1086EE756959B010C8A9020CEF4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_fr_NumberOfLimitedPartnership_81D8B1086EE756959B010C8A9020CEF4" xlink:to="lab_fr_NumberOfLimitedPartnership_81D8B1086EE756959B010C8A9020CEF4" xlink:type="arc" />
    <link:label id="lab_us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest_2F3B794BA30F8A0C0148E3BE1D527801_terseLabel_en-US" xlink:label="lab_us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest_6E64FFD3C1225ED289BC1FC10DDF67DC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Operating Partnership's minimum ownership interest in the Other Real Estate Partnerships</link:label>
    <link:label id="lab_us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest_2F3B794BA30F8A0C0148E3BE1D527801_label_en-US" xlink:label="lab_us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest_6E64FFD3C1225ED289BC1FC10DDF67DC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest" xlink:label="loc_us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest_6E64FFD3C1225ED289BC1FC10DDF67DC" xlink:type="locator" />
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    <link:label id="lab_us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest_21DA7B35BA4C187F24A9E3BE1D5261AF_terseLabel_en-US" xlink:label="lab_us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest_D8A8EDD4831C543B92440BF7B09555CD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">General partners' minimum ownership interest in the Other Real Estate Partnerships</link:label>
    <link:label id="lab_us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest_21DA7B35BA4C187F24A9E3BE1D5261AF_label_en-US" xlink:label="lab_us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest_D8A8EDD4831C543B92440BF7B09555CD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest</link:label>
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    <link:label id="lab_us-gaap_EquityMethodInvestmentOwnershipPercentage_B6D0444454263C6F4E87E3BE1D52183E_label_en-US" xlink:label="lab_us-gaap_EquityMethodInvestmentOwnershipPercentage_988F7FDBDB29566BAE04160FE59F267E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Method Investment, Ownership Percentage</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:label="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_988F7FDBDB29566BAE04160FE59F267E" xlink:type="locator" />
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    <link:label id="lab_us-gaap_NumberOfRealEstateProperties_BF19771100C32D55E5A7E3BE1D53190C_terseLabel_en-US" xlink:label="lab_us-gaap_NumberOfRealEstateProperties_E4C390FCCAED549BB30688C7DBEB4252" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of industrial properties owned</link:label>
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    <link:label id="lab_us-gaap_NumberOfStatesInWhichEntityOperates_76D0CA7EC881571FC1FAE3BE1D536776_terseLabel_en-US" xlink:label="lab_us-gaap_NumberOfStatesInWhichEntityOperates_FBD0CCCB2374504D98A5D28EDFEB5586" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of states in which industrial properties are located</link:label>
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    <link:label id="lab_us-gaap_AreaOfRealEstateProperty_8A7A19586DE46DA0861BE3BE1D5395A5_terseLabel_en-US" xlink:label="lab_us-gaap_AreaOfRealEstateProperty_1505A85FFAB85C2592B4CFA173FBE33A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gross leasable area (GLA) of industrial properties owned</link:label>
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    <link:label id="lab_fr_TenThousandSevenHundredNineGilroyRoadMember_08872C993F657C530A871D1E49E8D426_documentation_en-US" xlink:label="lab_fr_TenThousandSevenHundredNineGilroyRoadMember_08872C993F657C530A871D1E49E8D426" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Ten thousand seven hundred nine Gilroy Road.</link:label>
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    <link:label id="lab_fr_ThirtyEightLovetonCircleMember_D095386BE92EAD31ED6C1D1E49E99353_terseLabel_en-US" xlink:label="lab_fr_ThirtyEightLovetonCircleMember_D095386BE92EAD31ED6C1D1E49E99353" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">38 Loveton Circle [Member]</link:label>
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    <link:label id="lab_fr_FourHundredOldPostRoadMember_97F139132092C8BF64481D1E49E9289B_terseLabel_en-US" xlink:label="lab_fr_FourHundredOldPostRoadMember_97F139132092C8BF64481D1E49E9289B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">400 Old Post Road [Member]</link:label>
    <link:label id="lab_fr_FourHundredOldPostRoadMember_97F139132092C8BF64481D1E49E9289B_label_en-US" xlink:label="lab_fr_FourHundredOldPostRoadMember_97F139132092C8BF64481D1E49E9289B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Four Hundred Old Post Road [Member]</link:label>
    <link:label id="lab_fr_FourHundredOldPostRoadMember_97F139132092C8BF64481D1E49E9289B_documentation_en-US" xlink:label="lab_fr_FourHundredOldPostRoadMember_97F139132092C8BF64481D1E49E9289B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Four Hundred Old Post Road [Member]</link:label>
    <link:loc xlink:href="fr-20191231.xsd#fr_FourHundredOldPostRoadMember" xlink:label="loc_fr_FourHundredOldPostRoadMember_97F139132092C8BF64481D1E49E9289B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_fr_FourHundredOldPostRoadMember_97F139132092C8BF64481D1E49E9289B" xlink:to="lab_fr_FourHundredOldPostRoadMember_97F139132092C8BF64481D1E49E9289B" xlink:type="arc" />
    <link:label id="lab_fr_FiveHundredOldPostRoadMember_7A7E04F3B86F374200F71D1E49E94B49_terseLabel_en-US" xlink:label="lab_fr_FiveHundredOldPostRoadMember_7A7E04F3B86F374200F71D1E49E94B49" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">500 Old Post Road [Member]</link:label>
    <link:label id="lab_fr_FiveHundredOldPostRoadMember_7A7E04F3B86F374200F71D1E49E94B49_label_en-US" xlink:label="lab_fr_FiveHundredOldPostRoadMember_7A7E04F3B86F374200F71D1E49E94B49" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Five Hundred Old Post Road [Member]</link:label>
    <link:label id="lab_fr_FiveHundredOldPostRoadMember_7A7E04F3B86F374200F71D1E49E94B49_documentation_en-US" xlink:label="lab_fr_FiveHundredOldPostRoadMember_7A7E04F3B86F374200F71D1E49E94B49" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Five Hundred Old Post Road [Member]</link:label>
    <link:loc xlink:href="fr-20191231.xsd#fr_FiveHundredOldPostRoadMember" xlink:label="loc_fr_FiveHundredOldPostRoadMember_7A7E04F3B86F374200F71D1E49E94B49" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_fr_FiveHundredOldPostRoadMember_7A7E04F3B86F374200F71D1E49E94B49" xlink:to="lab_fr_FiveHundredOldPostRoadMember_7A7E04F3B86F374200F71D1E49E94B49" xlink:type="arc" />
    <link:label id="lab_fr_FiveEightOneWelltownRoadTysonBlvdMember_ABC60A9FC3D90FB7A1B21D1E49EA9A48_terseLabel_en-US" xlink:label="lab_fr_FiveEightOneWelltownRoadTysonBlvdMember_ABC60A9FC3D90FB7A1B21D1E49EA9A48" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">581 Welltown Road Tyson Blvd [Member]</link:label>
    <link:label id="lab_fr_FiveEightOneWelltownRoadTysonBlvdMember_ABC60A9FC3D90FB7A1B21D1E49EA9A48_label_en-US" xlink:label="lab_fr_FiveEightOneWelltownRoadTysonBlvdMember_ABC60A9FC3D90FB7A1B21D1E49EA9A48" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Five Eight One Welltown Road Tyson Blvd [Member]</link:label>
    <link:label id="lab_fr_FiveEightOneWelltownRoadTysonBlvdMember_ABC60A9FC3D90FB7A1B21D1E49EA9A48_documentation_en-US" xlink:label="lab_fr_FiveEightOneWelltownRoadTysonBlvdMember_ABC60A9FC3D90FB7A1B21D1E49EA9A48" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Five Eight One Welltown Road Tyson Blvd [Member].</link:label>
    <link:loc xlink:href="fr-20191231.xsd#fr_FiveEightOneWelltownRoadTysonBlvdMember" xlink:label="loc_fr_FiveEightOneWelltownRoadTysonBlvdMember_ABC60A9FC3D90FB7A1B21D1E49EA9A48" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_fr_FiveEightOneWelltownRoadTysonBlvdMember_ABC60A9FC3D90FB7A1B21D1E49EA9A48" xlink:to="lab_fr_FiveEightOneWelltownRoadTysonBlvdMember_ABC60A9FC3D90FB7A1B21D1E49EA9A48" xlink:type="arc" />
    <link:label id="lab_fr_OneThousandTwoHundredAndFourteenBFreedomRoadMember_CC0327D3964DBCE64FAF1D1E49EA4548_terseLabel_en-US" xlink:label="lab_fr_OneThousandTwoHundredAndFourteenBFreedomRoadMember_CC0327D3964DBCE64FAF1D1E49EA4548" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">1214-B Freedom Road [Member]</link:label>
    <link:label id="lab_fr_OneThousandTwoHundredAndFourteenBFreedomRoadMember_CC0327D3964DBCE64FAF1D1E49EA4548_label_en-US" xlink:label="lab_fr_OneThousandTwoHundredAndFourteenBFreedomRoadMember_CC0327D3964DBCE64FAF1D1E49EA4548" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">One Thousand Two Hundred And Fourteen B Freedom Road [Member]</link:label>
    <link:label id="lab_fr_OneThousandTwoHundredAndFourteenBFreedomRoadMember_CC0327D3964DBCE64FAF1D1E49EA4548_documentation_en-US" xlink:label="lab_fr_OneThousandTwoHundredAndFourteenBFreedomRoadMember_CC0327D3964DBCE64FAF1D1E49EA4548" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">One thousand two hundred and fourteen b freedom road.</link:label>
    <link:loc xlink:href="fr-20191231.xsd#fr_OneThousandTwoHundredAndFourteenBFreedomRoadMember" xlink:label="loc_fr_OneThousandTwoHundredAndFourteenBFreedomRoadMember_CC0327D3964DBCE64FAF1D1E49EA4548" xlink:type="locator" />
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    <link:label id="lab_fr_FourHundredOneRussellDriveMember_2E224F97C28A0837F6951D1E49EA34E7_terseLabel_en-US" xlink:label="lab_fr_FourHundredOneRussellDriveMember_2E224F97C28A0837F6951D1E49EA34E7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">401 Russell Drive [Member]</link:label>
    <link:label id="lab_fr_FourHundredOneRussellDriveMember_2E224F97C28A0837F6951D1E49EA34E7_label_en-US" xlink:label="lab_fr_FourHundredOneRussellDriveMember_2E224F97C28A0837F6951D1E49EA34E7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Four Hundred One Russell Drive [Member]</link:label>
    <link:label id="lab_fr_FourHundredOneRussellDriveMember_2E224F97C28A0837F6951D1E49EA34E7_documentation_en-US" xlink:label="lab_fr_FourHundredOneRussellDriveMember_2E224F97C28A0837F6951D1E49EA34E7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Four hundred one Russell Drive.</link:label>
    <link:loc xlink:href="fr-20191231.xsd#fr_FourHundredOneRussellDriveMember" xlink:label="loc_fr_FourHundredOneRussellDriveMember_2E224F97C28A0837F6951D1E49EA34E7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_fr_FourHundredOneRussellDriveMember_2E224F97C28A0837F6951D1E49EA34E7" xlink:to="lab_fr_FourHundredOneRussellDriveMember_2E224F97C28A0837F6951D1E49EA34E7" xlink:type="arc" />
    <link:label id="lab_fr_TwoThousandSevenHundredCommerceDriveMember_2AACFBC656DE1F30C1701D1E49EAD21A_terseLabel_en-US" xlink:label="lab_fr_TwoThousandSevenHundredCommerceDriveMember_2AACFBC656DE1F30C1701D1E49EAD21A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2700 Commerce Drive [Member]</link:label>
    <link:label id="lab_fr_TwoThousandSevenHundredCommerceDriveMember_2AACFBC656DE1F30C1701D1E49EAD21A_label_en-US" xlink:label="lab_fr_TwoThousandSevenHundredCommerceDriveMember_2AACFBC656DE1F30C1701D1E49EAD21A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Two Thousand Seven Hundred Commerce Drive [Member]</link:label>
    <link:label id="lab_fr_TwoThousandSevenHundredCommerceDriveMember_2AACFBC656DE1F30C1701D1E49EAD21A_documentation_en-US" xlink:label="lab_fr_TwoThousandSevenHundredCommerceDriveMember_2AACFBC656DE1F30C1701D1E49EAD21A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Two thousand seven hundred commerce drive.</link:label>
    <link:loc xlink:href="fr-20191231.xsd#fr_TwoThousandSevenHundredCommerceDriveMember" xlink:label="loc_fr_TwoThousandSevenHundredCommerceDriveMember_2AACFBC656DE1F30C1701D1E49EAD21A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_fr_TwoThousandSevenHundredCommerceDriveMember_2AACFBC656DE1F30C1701D1E49EAD21A" xlink:to="lab_fr_TwoThousandSevenHundredCommerceDriveMember_2AACFBC656DE1F30C1701D1E49EAD21A" xlink:type="arc" />
    <link:label id="lab_fr_TwoThousandSevenHundredAndOneCommerceDriveMember_2B0D45B2E0229FFBCA2E1D1E49EAB41D_terseLabel_en-US" xlink:label="lab_fr_TwoThousandSevenHundredAndOneCommerceDriveMember_2B0D45B2E0229FFBCA2E1D1E49EAB41D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2701 Commerce Drive [Member]</link:label>
    <link:label id="lab_fr_TwoThousandSevenHundredAndOneCommerceDriveMember_2B0D45B2E0229FFBCA2E1D1E49EAB41D_label_en-US" xlink:label="lab_fr_TwoThousandSevenHundredAndOneCommerceDriveMember_2B0D45B2E0229FFBCA2E1D1E49EAB41D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Two Thousand Seven Hundred And One Commerce Drive [Member]</link:label>
    <link:label id="lab_fr_TwoThousandSevenHundredAndOneCommerceDriveMember_2B0D45B2E0229FFBCA2E1D1E49EAB41D_documentation_en-US" xlink:label="lab_fr_TwoThousandSevenHundredAndOneCommerceDriveMember_2B0D45B2E0229FFBCA2E1D1E49EAB41D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Two thousand seven hundred and one commerce drive.</link:label>
    <link:loc xlink:href="fr-20191231.xsd#fr_TwoThousandSevenHundredAndOneCommerceDriveMember" xlink:label="loc_fr_TwoThousandSevenHundredAndOneCommerceDriveMember_2B0D45B2E0229FFBCA2E1D1E49EAB41D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_fr_TwoThousandSevenHundredAndOneCommerceDriveMember_2B0D45B2E0229FFBCA2E1D1E49EAB41D" xlink:to="lab_fr_TwoThousandSevenHundredAndOneCommerceDriveMember_2B0D45B2E0229FFBCA2E1D1E49EAB41D" xlink:type="arc" />
    <link:label id="lab_fr_TwoThousandSevenHundredAndEightyCommerceDriveMember_B19F2CC81C8E165EA12F1D1E49EBF8D7_terseLabel_en-US" xlink:label="lab_fr_TwoThousandSevenHundredAndEightyCommerceDriveMember_B19F2CC81C8E165EA12F1D1E49EBF8D7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2780 Commerce Drive [Member]</link:label>
    <link:label id="lab_fr_TwoThousandSevenHundredAndEightyCommerceDriveMember_B19F2CC81C8E165EA12F1D1E49EBF8D7_label_en-US" xlink:label="lab_fr_TwoThousandSevenHundredAndEightyCommerceDriveMember_B19F2CC81C8E165EA12F1D1E49EBF8D7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Two Thousand Seven Hundred And Eighty Commerce Drive [Member]</link:label>
    <link:label id="lab_fr_TwoThousandSevenHundredAndEightyCommerceDriveMember_B19F2CC81C8E165EA12F1D1E49EBF8D7_documentation_en-US" xlink:label="lab_fr_TwoThousandSevenHundredAndEightyCommerceDriveMember_B19F2CC81C8E165EA12F1D1E49EBF8D7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Two thousand seven hundred and eighty commerce drive.</link:label>
    <link:loc xlink:href="fr-20191231.xsd#fr_TwoThousandSevenHundredAndEightyCommerceDriveMember" xlink:label="loc_fr_TwoThousandSevenHundredAndEightyCommerceDriveMember_B19F2CC81C8E165EA12F1D1E49EBF8D7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_fr_TwoThousandSevenHundredAndEightyCommerceDriveMember_B19F2CC81C8E165EA12F1D1E49EBF8D7" xlink:to="lab_fr_TwoThousandSevenHundredAndEightyCommerceDriveMember_B19F2CC81C8E165EA12F1D1E49EBF8D7" xlink:type="arc" />
    <link:label id="lab_fr_ThreeHundredAndFiftyOldSilverSpringRoadMember_89339482BF0E84173C891D1E49EB3B08_terseLabel_en-US" xlink:label="lab_fr_ThreeHundredAndFiftyOldSilverSpringRoadMember_89339482BF0E84173C891D1E49EB3B08" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">350 Old Silver Spring Road [Member]</link:label>
    <link:label id="lab_fr_ThreeHundredAndFiftyOldSilverSpringRoadMember_89339482BF0E84173C891D1E49EB3B08_label_en-US" xlink:label="lab_fr_ThreeHundredAndFiftyOldSilverSpringRoadMember_89339482BF0E84173C891D1E49EB3B08" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Three Hundred And Fifty Old Silver Spring Road [Member]</link:label>
    <link:label id="lab_fr_ThreeHundredAndFiftyOldSilverSpringRoadMember_89339482BF0E84173C891D1E49EB3B08_documentation_en-US" xlink:label="lab_fr_ThreeHundredAndFiftyOldSilverSpringRoadMember_89339482BF0E84173C891D1E49EB3B08" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Three hundred and fifty old silver spring road.</link:label>
    <link:loc xlink:href="fr-20191231.xsd#fr_ThreeHundredAndFiftyOldSilverSpringRoadMember" xlink:label="loc_fr_ThreeHundredAndFiftyOldSilverSpringRoadMember_89339482BF0E84173C891D1E49EB3B08" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_fr_ThreeHundredAndFiftyOldSilverSpringRoadMember_89339482BF0E84173C891D1E49EB3B08" xlink:to="lab_fr_ThreeHundredAndFiftyOldSilverSpringRoadMember_89339482BF0E84173C891D1E49EB3B08" xlink:type="arc" />
    <link:label id="lab_fr_OneFourMcfaddenRoadMember_92C885D43C82C83C39241D1E49EBE775_terseLabel_en-US" xlink:label="lab_fr_OneFourMcfaddenRoadMember_92C885D43C82C83C39241D1E49EBE775" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">14 McFadden Road [Member]</link:label>
    <link:label id="lab_fr_OneFourMcfaddenRoadMember_92C885D43C82C83C39241D1E49EBE775_label_en-US" xlink:label="lab_fr_OneFourMcfaddenRoadMember_92C885D43C82C83C39241D1E49EBE775" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">One Four Mcfadden Road [Member]</link:label>
    <link:label id="lab_fr_OneFourMcfaddenRoadMember_92C885D43C82C83C39241D1E49EBE775_documentation_en-US" xlink:label="lab_fr_OneFourMcfaddenRoadMember_92C885D43C82C83C39241D1E49EBE775" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">One four McFadden Road.</link:label>
    <link:loc xlink:href="fr-20191231.xsd#fr_OneFourMcfaddenRoadMember" xlink:label="loc_fr_OneFourMcfaddenRoadMember_92C885D43C82C83C39241D1E49EBE775" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_fr_OneFourMcfaddenRoadMember_92C885D43C82C83C39241D1E49EBE775" xlink:to="lab_fr_OneFourMcfaddenRoadMember_92C885D43C82C83C39241D1E49EBE775" xlink:type="arc" />
    <link:label id="lab_fr_FourThirtyOneRailroadAvenueMember_9DCC30AFFB46EA1BC0CE1D1E49EBA39A_terseLabel_en-US" xlink:label="lab_fr_FourThirtyOneRailroadAvenueMember_9DCC30AFFB46EA1BC0CE1D1E49EBA39A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">431 Railroad Avenue [Member]</link:label>
    <link:label id="lab_fr_FourThirtyOneRailroadAvenueMember_9DCC30AFFB46EA1BC0CE1D1E49EBA39A_label_en-US" xlink:label="lab_fr_FourThirtyOneRailroadAvenueMember_9DCC30AFFB46EA1BC0CE1D1E49EBA39A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Four Thirty One Railroad Avenue [Member]</link:label>
    <link:label id="lab_fr_FourThirtyOneRailroadAvenueMember_9DCC30AFFB46EA1BC0CE1D1E49EBA39A_documentation_en-US" xlink:label="lab_fr_FourThirtyOneRailroadAvenueMember_9DCC30AFFB46EA1BC0CE1D1E49EBA39A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Four thirty one railroad avenue.</link:label>
    <link:loc xlink:href="fr-20191231.xsd#fr_FourThirtyOneRailroadAvenueMember" xlink:label="loc_fr_FourThirtyOneRailroadAvenueMember_9DCC30AFFB46EA1BC0CE1D1E49EBA39A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_fr_FourThirtyOneRailroadAvenueMember_9DCC30AFFB46EA1BC0CE1D1E49EBA39A" xlink:to="lab_fr_FourThirtyOneRailroadAvenueMember_9DCC30AFFB46EA1BC0CE1D1E49EBA39A" xlink:type="arc" />
    <link:label id="lab_fr_SixThousandNineHundredAndFiftyOneAllentownBlvdMember_1D8AC01178157B115B0D1D1E49EB7250_terseLabel_en-US" xlink:label="lab_fr_SixThousandNineHundredAndFiftyOneAllentownBlvdMember_1D8AC01178157B115B0D1D1E49EB7250" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">6951 Allentown Blvd [Member]</link:label>
    <link:label id="lab_fr_SixThousandNineHundredAndFiftyOneAllentownBlvdMember_1D8AC01178157B115B0D1D1E49EB7250_label_en-US" xlink:label="lab_fr_SixThousandNineHundredAndFiftyOneAllentownBlvdMember_1D8AC01178157B115B0D1D1E49EB7250" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Six Thousand Nine Hundred And Fifty One Allentown Blvd [Member]</link:label>
    <link:label id="lab_fr_SixThousandNineHundredAndFiftyOneAllentownBlvdMember_1D8AC01178157B115B0D1D1E49EB7250_documentation_en-US" xlink:label="lab_fr_SixThousandNineHundredAndFiftyOneAllentownBlvdMember_1D8AC01178157B115B0D1D1E49EB7250" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Six thousand nine hundred and fifty one Allentown Blvd.</link:label>
    <link:loc xlink:href="fr-20191231.xsd#fr_SixThousandNineHundredAndFiftyOneAllentownBlvdMember" xlink:label="loc_fr_SixThousandNineHundredAndFiftyOneAllentownBlvdMember_1D8AC01178157B115B0D1D1E49EB7250" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_fr_SixThousandNineHundredAndFiftyOneAllentownBlvdMember_1D8AC01178157B115B0D1D1E49EB7250" xlink:to="lab_fr_SixThousandNineHundredAndFiftyOneAllentownBlvdMember_1D8AC01178157B115B0D1D1E49EB7250" xlink:type="arc" />
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    <link:label id="lab_fr_TwoHundredFiftyOneAirportRoadMember_574BDDE45967D0252C161D1E49EFE66F_documentation_en-US" xlink:label="lab_fr_TwoHundredFiftyOneAirportRoadMember_574BDDE45967D0252C161D1E49EFE66F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Two hundred fifty one Airport Road.</link:label>
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    <link:label id="lab_fr_FourHundredCrossroadsPkwyMember_92F18207142A7DA45EA91D1E49EF0295_terseLabel_en-US" xlink:label="lab_fr_FourHundredCrossroadsPkwyMember_92F18207142A7DA45EA91D1E49EF0295" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">400 Crossroads Pkwy [Member]</link:label>
    <link:label id="lab_fr_FourHundredCrossroadsPkwyMember_92F18207142A7DA45EA91D1E49EF0295_label_en-US" xlink:label="lab_fr_FourHundredCrossroadsPkwyMember_92F18207142A7DA45EA91D1E49EF0295" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Four Hundred Crossroads Pkwy [Member]</link:label>
    <link:label id="lab_fr_FourHundredCrossroadsPkwyMember_92F18207142A7DA45EA91D1E49EF0295_documentation_en-US" xlink:label="lab_fr_FourHundredCrossroadsPkwyMember_92F18207142A7DA45EA91D1E49EF0295" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Four hundred Crossroads Pkwy.</link:label>
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    <link:label id="lab_fr_SevenThousandEightHundredOneWIndustrialDriveMember_5F811744AA9EB637E7F21D1E49EFDFE6_label_en-US" xlink:label="lab_fr_SevenThousandEightHundredOneWIndustrialDriveMember_5F811744AA9EB637E7F21D1E49EFDFE6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Seven Thousand Eight Hundred One W Industrial Drive [Member]</link:label>
    <link:label id="lab_fr_SevenThousandEightHundredOneWIndustrialDriveMember_5F811744AA9EB637E7F21D1E49EFDFE6_documentation_en-US" xlink:label="lab_fr_SevenThousandEightHundredOneWIndustrialDriveMember_5F811744AA9EB637E7F21D1E49EFDFE6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Seven thousand eight hundred one W Industrial Drive.</link:label>
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    <link:label id="lab_fr_SevenHundredTwentyFiveKimberlyDriveMember_3BDC70312611D2BD225B1D1E49F07396_label_en-US" xlink:label="lab_fr_SevenHundredTwentyFiveKimberlyDriveMember_3BDC70312611D2BD225B1D1E49F07396" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Seven Hundred Twenty Five Kimberly Drive [Member]</link:label>
    <link:label id="lab_fr_SevenHundredTwentyFiveKimberlyDriveMember_3BDC70312611D2BD225B1D1E49F07396_documentation_en-US" xlink:label="lab_fr_SevenHundredTwentyFiveKimberlyDriveMember_3BDC70312611D2BD225B1D1E49F07396" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Seven hundred twenty five Kimberly Drive.</link:label>
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    <link:label id="lab_fr_SeventeenThousandOneSVincennesMember_DDA222AEE4542F7CA9DC1D1E49F02785_terseLabel_en-US" xlink:label="lab_fr_SeventeenThousandOneSVincennesMember_DDA222AEE4542F7CA9DC1D1E49F02785" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">17001 S. Vincennes [Member]</link:label>
    <link:label id="lab_fr_SeventeenThousandOneSVincennesMember_DDA222AEE4542F7CA9DC1D1E49F02785_label_en-US" xlink:label="lab_fr_SeventeenThousandOneSVincennesMember_DDA222AEE4542F7CA9DC1D1E49F02785" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Seventeen Thousand One S Vincennes [Member]</link:label>
    <link:label id="lab_fr_SeventeenThousandOneSVincennesMember_DDA222AEE4542F7CA9DC1D1E49F02785_documentation_en-US" xlink:label="lab_fr_SeventeenThousandOneSVincennesMember_DDA222AEE4542F7CA9DC1D1E49F02785" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Seventeen thousand one S. Vincennes.</link:label>
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    <link:label id="lab_fr_TwoThousandNineHundredWOneHundredSixtySixThStreetMember_689F2AB1EDFE04EE977D1D1E49F00EB8_terseLabel_en-US" xlink:label="lab_fr_TwoThousandNineHundredWOneHundredSixtySixThStreetMember_689F2AB1EDFE04EE977D1D1E49F00EB8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2900 W. 166th Street [Member]</link:label>
    <link:label id="lab_fr_TwoThousandNineHundredWOneHundredSixtySixThStreetMember_689F2AB1EDFE04EE977D1D1E49F00EB8_label_en-US" xlink:label="lab_fr_TwoThousandNineHundredWOneHundredSixtySixThStreetMember_689F2AB1EDFE04EE977D1D1E49F00EB8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Two Thousand Nine Hundred W One Hundred Sixty Six Th Street [Member]</link:label>
    <link:label id="lab_fr_TwoThousandNineHundredWOneHundredSixtySixThStreetMember_689F2AB1EDFE04EE977D1D1E49F00EB8_documentation_en-US" xlink:label="lab_fr_TwoThousandNineHundredWOneHundredSixtySixThStreetMember_689F2AB1EDFE04EE977D1D1E49F00EB8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Two thousand nine hundred W one hundred sixty six th Street.</link:label>
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    <link:label id="lab_fr_FiveHundredFiftyFiveWAlgonquinRdMember_484B185AB62721E8F1DE1D1E49F01259_terseLabel_en-US" xlink:label="lab_fr_FiveHundredFiftyFiveWAlgonquinRdMember_484B185AB62721E8F1DE1D1E49F01259" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">555 W. Algonquin Rd [Member]</link:label>
    <link:label id="lab_fr_FiveHundredFiftyFiveWAlgonquinRdMember_484B185AB62721E8F1DE1D1E49F01259_label_en-US" xlink:label="lab_fr_FiveHundredFiftyFiveWAlgonquinRdMember_484B185AB62721E8F1DE1D1E49F01259" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Five Hundred Fifty Five W Algonquin Rd [Member]</link:label>
    <link:label id="lab_fr_FiveHundredFiftyFiveWAlgonquinRdMember_484B185AB62721E8F1DE1D1E49F01259_documentation_en-US" xlink:label="lab_fr_FiveHundredFiftyFiveWAlgonquinRdMember_484B185AB62721E8F1DE1D1E49F01259" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Five hundred fifty five W Algonquin rd.</link:label>
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    <link:label id="lab_fr_OneThousandFiveHundredOneOaktonStreetMember_8079A277E3188F498CAB1D1E49F168EA_terseLabel_en-US" xlink:label="lab_fr_OneThousandFiveHundredOneOaktonStreetMember_8079A277E3188F498CAB1D1E49F168EA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">1501 Oakton Street [Member]</link:label>
    <link:label id="lab_fr_OneThousandFiveHundredOneOaktonStreetMember_8079A277E3188F498CAB1D1E49F168EA_label_en-US" xlink:label="lab_fr_OneThousandFiveHundredOneOaktonStreetMember_8079A277E3188F498CAB1D1E49F168EA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">One Thousand Five Hundred One Oakton Street [Member]</link:label>
    <link:label id="lab_fr_OneThousandFiveHundredOneOaktonStreetMember_8079A277E3188F498CAB1D1E49F168EA_documentation_en-US" xlink:label="lab_fr_OneThousandFiveHundredOneOaktonStreetMember_8079A277E3188F498CAB1D1E49F168EA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">One thousand five hundred one Oakton Street.</link:label>
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    <link:label id="lab_fr_SixteenThousandFiveHundredWOneHundredThreeRdStreetMember_7442B7AB2EC62967DB841D1E49F15FB7_label_en-US" xlink:label="lab_fr_SixteenThousandFiveHundredWOneHundredThreeRdStreetMember_7442B7AB2EC62967DB841D1E49F15FB7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sixteen Thousand Five Hundred W One Hundred Three Rd Street [Member]</link:label>
    <link:label id="lab_fr_SixteenThousandFiveHundredWOneHundredThreeRdStreetMember_7442B7AB2EC62967DB841D1E49F15FB7_documentation_en-US" xlink:label="lab_fr_SixteenThousandFiveHundredWOneHundredThreeRdStreetMember_7442B7AB2EC62967DB841D1E49F15FB7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Sixteen thousand five hundred W one hundred three rd Street.</link:label>
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    <link:label id="lab_fr_EightFiveZeroFiveFiftyThStreetMember_95B7BEDE9DBDBC8C3E511D1E49F1155B_terseLabel_en-US" xlink:label="lab_fr_EightFiveZeroFiveFiftyThStreetMember_95B7BEDE9DBDBC8C3E511D1E49F1155B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">8505 50th Street [Member]</link:label>
    <link:label id="lab_fr_EightFiveZeroFiveFiftyThStreetMember_95B7BEDE9DBDBC8C3E511D1E49F1155B_label_en-US" xlink:label="lab_fr_EightFiveZeroFiveFiftyThStreetMember_95B7BEDE9DBDBC8C3E511D1E49F1155B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Eight Five Zero Five Fifty Th Street [Member]</link:label>
    <link:label id="lab_fr_EightFiveZeroFiveFiftyThStreetMember_95B7BEDE9DBDBC8C3E511D1E49F1155B_documentation_en-US" xlink:label="lab_fr_EightFiveZeroFiveFiftyThStreetMember_95B7BEDE9DBDBC8C3E511D1E49F1155B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Eight Five Zero Five Fifty Th Street [Member]</link:label>
    <link:loc xlink:href="fr-20191231.xsd#fr_EightFiveZeroFiveFiftyThStreetMember" xlink:label="loc_fr_EightFiveZeroFiveFiftyThStreetMember_95B7BEDE9DBDBC8C3E511D1E49F1155B" xlink:type="locator" />
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    <link:label id="lab_fr_FourThousandOneHundredRockCreekBlvdMember_F326F1C4C2059BE38E3D1D1E49F1F30B_terseLabel_en-US" xlink:label="lab_fr_FourThousandOneHundredRockCreekBlvdMember_F326F1C4C2059BE38E3D1D1E49F1F30B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">4100 Rock Creek Blvd [Member]</link:label>
    <link:label id="lab_fr_FourThousandOneHundredRockCreekBlvdMember_F326F1C4C2059BE38E3D1D1E49F1F30B_label_en-US" xlink:label="lab_fr_FourThousandOneHundredRockCreekBlvdMember_F326F1C4C2059BE38E3D1D1E49F1F30B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Four Thousand One Hundred Rock Creek Blvd [Member]</link:label>
    <link:label id="lab_fr_FourThousandOneHundredRockCreekBlvdMember_F326F1C4C2059BE38E3D1D1E49F1F30B_documentation_en-US" xlink:label="lab_fr_FourThousandOneHundredRockCreekBlvdMember_F326F1C4C2059BE38E3D1D1E49F1F30B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Four Thousand One Hundred Rock Creek Blvd [Member]</link:label>
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    <link:label id="lab_fr_TenThousandOneHundredFiftyEightThPlaceMember_BA0B2F670DB21589261C1D1E49F16D3E_terseLabel_en-US" xlink:label="lab_fr_TenThousandOneHundredFiftyEightThPlaceMember_BA0B2F670DB21589261C1D1E49F16D3E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">10100 58th Place [Member]</link:label>
    <link:label id="lab_fr_TenThousandOneHundredFiftyEightThPlaceMember_BA0B2F670DB21589261C1D1E49F16D3E_label_en-US" xlink:label="lab_fr_TenThousandOneHundredFiftyEightThPlaceMember_BA0B2F670DB21589261C1D1E49F16D3E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ten Thousand One Hundred Fifty Eight Th Place [Member]</link:label>
    <link:label id="lab_fr_TenThousandOneHundredFiftyEightThPlaceMember_BA0B2F670DB21589261C1D1E49F16D3E_documentation_en-US" xlink:label="lab_fr_TenThousandOneHundredFiftyEightThPlaceMember_BA0B2F670DB21589261C1D1E49F16D3E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Ten Thousand One Hundred Fifty Eight Th Place [Member]</link:label>
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    <link:label id="lab_fr_TwoFourZeroOneToTwoFourOneNineWalnutRidgeMember_F7D76D33447A51A9CBA11D1E49F5BB46_documentation_en-US" xlink:label="lab_fr_TwoFourZeroOneToTwoFourOneNineWalnutRidgeMember_F7D76D33447A51A9CBA11D1E49F5BB46" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Two four zero one to two four one nine walnut ridge.</link:label>
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    <link:label id="lab_fr_TwoTwoTwoZeroMerrittDriveMember_D617D99B8DE0920900C11D1E49F67D1D_documentation_en-US" xlink:label="lab_fr_TwoTwoTwoZeroMerrittDriveMember_D617D99B8DE0920900C11D1E49F67D1D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Two two two zero Merritt Drive.</link:label>
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    <link:label id="lab_fr_FourThousandNineHundredFortyAndFourThousandNineHundredFiftyParisMember_72A5DCA059A072EA2BFA1D1E49FF9F02_label_en-US" xlink:label="lab_fr_FourThousandNineHundredFortyAndFourThousandNineHundredFiftyParisMember_72A5DCA059A072EA2BFA1D1E49FF9F02" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Four Thousand Nine Hundred Forty And Four Thousand Nine Hundred Fifty Paris [Member]</link:label>
    <link:label id="lab_fr_FourThousandNineHundredFortyAndFourThousandNineHundredFiftyParisMember_72A5DCA059A072EA2BFA1D1E49FF9F02_documentation_en-US" xlink:label="lab_fr_FourThousandNineHundredFortyAndFourThousandNineHundredFiftyParisMember_72A5DCA059A072EA2BFA1D1E49FF9F02" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Four thousand nine hundred forty and four thousand nine hundred fifty Paris.</link:label>
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    <link:label id="lab_fr_SevenThousandThreeHundredSixtySevenSouthRevereParkwayMember_813E881937B00A2289491D1E49FF50B7_terseLabel_en-US" xlink:label="lab_fr_SevenThousandThreeHundredSixtySevenSouthRevereParkwayMember_813E881937B00A2289491D1E49FF50B7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">7367 South Revere Parkway [Member]</link:label>
    <link:label id="lab_fr_SevenThousandThreeHundredSixtySevenSouthRevereParkwayMember_813E881937B00A2289491D1E49FF50B7_label_en-US" xlink:label="lab_fr_SevenThousandThreeHundredSixtySevenSouthRevereParkwayMember_813E881937B00A2289491D1E49FF50B7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Seven Thousand Three Hundred Sixty Seven South Revere Parkway [Member]</link:label>
    <link:label id="lab_fr_SevenThousandThreeHundredSixtySevenSouthRevereParkwayMember_813E881937B00A2289491D1E49FF50B7_documentation_en-US" xlink:label="lab_fr_SevenThousandThreeHundredSixtySevenSouthRevereParkwayMember_813E881937B00A2289491D1E49FF50B7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Seven thousand three hundred sixty seven South Revere Parkway.</link:label>
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    <link:label id="lab_fr_EightThousandTwoHundredEastParkMeadowsDriveMember_A4FC242C62F33F3A52F71D1E49FF507D_terseLabel_en-US" xlink:label="lab_fr_EightThousandTwoHundredEastParkMeadowsDriveMember_A4FC242C62F33F3A52F71D1E49FF507D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">8200 East Park Meadows Drive [Member]</link:label>
    <link:label id="lab_fr_EightThousandTwoHundredEastParkMeadowsDriveMember_A4FC242C62F33F3A52F71D1E49FF507D_label_en-US" xlink:label="lab_fr_EightThousandTwoHundredEastParkMeadowsDriveMember_A4FC242C62F33F3A52F71D1E49FF507D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Eight Thousand Two Hundred East Park Meadows Drive [Member]</link:label>
    <link:label id="lab_fr_EightThousandTwoHundredEastParkMeadowsDriveMember_A4FC242C62F33F3A52F71D1E49FF507D_documentation_en-US" xlink:label="lab_fr_EightThousandTwoHundredEastParkMeadowsDriveMember_A4FC242C62F33F3A52F71D1E49FF507D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Eight thousand two hundred East Park Meadows Drive.</link:label>
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    <link:label id="lab_fr_ThreeThousandTwoHundredFiftyQuentinMember_8B8D53E476C4ED41F6E11D1E4A003006_label_en-US" xlink:label="lab_fr_ThreeThousandTwoHundredFiftyQuentinMember_8B8D53E476C4ED41F6E11D1E4A003006" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Three Thousand Two Hundred Fifty Quentin [Member]</link:label>
    <link:label id="lab_fr_ThreeThousandTwoHundredFiftyQuentinMember_8B8D53E476C4ED41F6E11D1E4A003006_documentation_en-US" xlink:label="lab_fr_ThreeThousandTwoHundredFiftyQuentinMember_8B8D53E476C4ED41F6E11D1E4A003006" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Three thousand two hundred fifty Quentin.</link:label>
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    <link:label id="lab_fr_EightZeroTwoZeroSouthparkCircleMember_875A845AAB26C9F005961D1E4A000C78_terseLabel_en-US" xlink:label="lab_fr_EightZeroTwoZeroSouthparkCircleMember_875A845AAB26C9F005961D1E4A000C78" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">8020 Southpark Circle [Member]</link:label>
    <link:label id="lab_fr_EightZeroTwoZeroSouthparkCircleMember_875A845AAB26C9F005961D1E4A000C78_label_en-US" xlink:label="lab_fr_EightZeroTwoZeroSouthparkCircleMember_875A845AAB26C9F005961D1E4A000C78" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Eight Zero Two Zero Southpark Circle [Member]</link:label>
    <link:label id="lab_fr_EightZeroTwoZeroSouthparkCircleMember_875A845AAB26C9F005961D1E4A000C78_documentation_en-US" xlink:label="lab_fr_EightZeroTwoZeroSouthparkCircleMember_875A845AAB26C9F005961D1E4A000C78" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Eight Zero Two Zero Southpark Circle</link:label>
    <link:loc xlink:href="fr-20191231.xsd#fr_EightZeroTwoZeroSouthparkCircleMember" xlink:label="loc_fr_EightZeroTwoZeroSouthparkCircleMember_875A845AAB26C9F005961D1E4A000C78" xlink:type="locator" />
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    <link:label id="lab_fr_EightThousandEightHundredTenWestOneHundredSixteenThStreetMember_B0C6B88E0B3BACF2FA2E1D1E4A00EC98_label_en-US" xlink:label="lab_fr_EightThousandEightHundredTenWestOneHundredSixteenThStreetMember_B0C6B88E0B3BACF2FA2E1D1E4A00EC98" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Eight Thousand Eight Hundred Ten West One Hundred Sixteen Th Street [Member]</link:label>
    <link:label id="lab_fr_EightThousandEightHundredTenWestOneHundredSixteenThStreetMember_B0C6B88E0B3BACF2FA2E1D1E4A00EC98_documentation_en-US" xlink:label="lab_fr_EightThousandEightHundredTenWestOneHundredSixteenThStreetMember_B0C6B88E0B3BACF2FA2E1D1E4A00EC98" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Eight Thousand Eight Hundred Ten West One Hundred Sixteen Th Street [Member]</link:label>
    <link:loc xlink:href="fr-20191231.xsd#fr_EightThousandEightHundredTenWestOneHundredSixteenThStreetMember" xlink:label="loc_fr_EightThousandEightHundredTenWestOneHundredSixteenThStreetMember_B0C6B88E0B3BACF2FA2E1D1E4A00EC98" xlink:type="locator" />
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    <link:label id="lab_fr_EightThousandEightHundredTwentyWOneHundredSixteenThStreetMember_455ACC1446EA6C7781751D1E4A00CA1E_terseLabel_en-US" xlink:label="lab_fr_EightThousandEightHundredTwentyWOneHundredSixteenThStreetMember_455ACC1446EA6C7781751D1E4A00CA1E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">8820 W. 116th Circle [Member]</link:label>
    <link:label id="lab_fr_EightThousandEightHundredTwentyWOneHundredSixteenThStreetMember_455ACC1446EA6C7781751D1E4A00CA1E_label_en-US" xlink:label="lab_fr_EightThousandEightHundredTwentyWOneHundredSixteenThStreetMember_455ACC1446EA6C7781751D1E4A00CA1E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Eight Thousand Eight Hundred Twenty W One Hundred Sixteen Th Street [Member]</link:label>
    <link:label id="lab_fr_EightThousandEightHundredTwentyWOneHundredSixteenThStreetMember_455ACC1446EA6C7781751D1E4A00CA1E_documentation_en-US" xlink:label="lab_fr_EightThousandEightHundredTwentyWOneHundredSixteenThStreetMember_455ACC1446EA6C7781751D1E4A00CA1E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Eight thousand eight hundred twenty W one hundred sixteen th Street.</link:label>
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    <link:label id="lab_fr_EightThousandEightHundredThirtyFiveWOneHundredSixteenThStreetMember_878C35297CBBA47446B81D1E4A0093B0_label_en-US" xlink:label="lab_fr_EightThousandEightHundredThirtyFiveWOneHundredSixteenThStreetMember_878C35297CBBA47446B81D1E4A0093B0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Eight Thousand Eight Hundred Thirty Five W One Hundred Sixteen Th Street [Member]</link:label>
    <link:label id="lab_fr_EightThousandEightHundredThirtyFiveWOneHundredSixteenThStreetMember_878C35297CBBA47446B81D1E4A0093B0_documentation_en-US" xlink:label="lab_fr_EightThousandEightHundredThirtyFiveWOneHundredSixteenThStreetMember_878C35297CBBA47446B81D1E4A0093B0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Eight thousand eight hundred thirty five W one hundred sixteen th Street.</link:label>
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    <link:label id="lab_fr_EighteenThousandOneHundredFiftyEThirtyTwoNdStreetMember_1E3CABDE6785ECC1B3381D1E4A004047_terseLabel_en-US" xlink:label="lab_fr_EighteenThousandOneHundredFiftyEThirtyTwoNdStreetMember_1E3CABDE6785ECC1B3381D1E4A004047" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">18150 E. 32nd Place [Member]</link:label>
    <link:label id="lab_fr_EighteenThousandOneHundredFiftyEThirtyTwoNdStreetMember_1E3CABDE6785ECC1B3381D1E4A004047_label_en-US" xlink:label="lab_fr_EighteenThousandOneHundredFiftyEThirtyTwoNdStreetMember_1E3CABDE6785ECC1B3381D1E4A004047" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Eighteen Thousand One Hundred Fifty E Thirty Two Nd Street [Member]</link:label>
    <link:label id="lab_fr_EighteenThousandOneHundredFiftyEThirtyTwoNdStreetMember_1E3CABDE6785ECC1B3381D1E4A004047_documentation_en-US" xlink:label="lab_fr_EighteenThousandOneHundredFiftyEThirtyTwoNdStreetMember_1E3CABDE6785ECC1B3381D1E4A004047" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Eighteen thousand one hundred fifty E thirty two nd Street.</link:label>
    <link:loc xlink:href="fr-20191231.xsd#fr_EighteenThousandOneHundredFiftyEThirtyTwoNdStreetMember" xlink:label="loc_fr_EighteenThousandOneHundredFiftyEThirtyTwoNdStreetMember_1E3CABDE6785ECC1B3381D1E4A004047" xlink:type="locator" />
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    <link:label id="lab_fr_ThreeThousandFourHundredFraserStreetMember_A662C14A1076BE10AD2B1D1E4A01677E_terseLabel_en-US" xlink:label="lab_fr_ThreeThousandFourHundredFraserStreetMember_A662C14A1076BE10AD2B1D1E4A01677E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">3400 Fraser Street [Member]</link:label>
    <link:label id="lab_fr_ThreeThousandFourHundredFraserStreetMember_A662C14A1076BE10AD2B1D1E4A01677E_label_en-US" xlink:label="lab_fr_ThreeThousandFourHundredFraserStreetMember_A662C14A1076BE10AD2B1D1E4A01677E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Three Thousand Four Hundred Fraser Street [Member]</link:label>
    <link:label id="lab_fr_ThreeThousandFourHundredFraserStreetMember_A662C14A1076BE10AD2B1D1E4A01677E_documentation_en-US" xlink:label="lab_fr_ThreeThousandFourHundredFraserStreetMember_A662C14A1076BE10AD2B1D1E4A01677E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Three thousand four hundred Fraser Street.</link:label>
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    <link:label id="lab_fr_OneEightTwoSixNorthwoodDriveMember_3E8BA21D9C98697224881D1E4A03457C_documentation_en-US" xlink:label="lab_fr_OneEightTwoSixNorthwoodDriveMember_3E8BA21D9C98697224881D1E4A03457C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">One eight two six Northwood Drive.</link:label>
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    <link:loc xlink:href="fr-20191231.xsd#fr_TwoEightSevenZeroTechnologyDriveMember" xlink:label="loc_fr_TwoEightSevenZeroTechnologyDriveMember_48D54B75D24DCF770C231D1E4A04AEC5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_fr_TwoEightSevenZeroTechnologyDriveMember_48D54B75D24DCF770C231D1E4A04AEC5" xlink:to="lab_fr_TwoEightSevenZeroTechnologyDriveMember_48D54B75D24DCF770C231D1E4A04AEC5" xlink:type="arc" />
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    <link:label id="lab_fr_TwoNineZeroZeroTechnologyDriveMember_29D7F0494BCE8A05EDF31D1E4A041604_documentation_en-US" xlink:label="lab_fr_TwoNineZeroZeroTechnologyDriveMember_29D7F0494BCE8A05EDF31D1E4A041604" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Two nine zero zero technology drive.</link:label>
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    <link:label id="lab_fr_TwoNineThreeZeroTechnologyDriveMember_BB121B6F38287B4B41F21D1E4A04DD40_terseLabel_en-US" xlink:label="lab_fr_TwoNineThreeZeroTechnologyDriveMember_BB121B6F38287B4B41F21D1E4A04DD40" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2930 Technology Drive [Member]</link:label>
    <link:label id="lab_fr_TwoNineThreeZeroTechnologyDriveMember_BB121B6F38287B4B41F21D1E4A04DD40_label_en-US" xlink:label="lab_fr_TwoNineThreeZeroTechnologyDriveMember_BB121B6F38287B4B41F21D1E4A04DD40" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Two Nine Three Zero Technology Drive [Member]</link:label>
    <link:label id="lab_fr_TwoNineThreeZeroTechnologyDriveMember_BB121B6F38287B4B41F21D1E4A04DD40_documentation_en-US" xlink:label="lab_fr_TwoNineThreeZeroTechnologyDriveMember_BB121B6F38287B4B41F21D1E4A04DD40" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Two nine three zero technology drive.</link:label>
    <link:loc xlink:href="fr-20191231.xsd#fr_TwoNineThreeZeroTechnologyDriveMember" xlink:label="loc_fr_TwoNineThreeZeroTechnologyDriveMember_BB121B6F38287B4B41F21D1E4A04DD40" xlink:type="locator" />
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    <link:label id="lab_fr_TwoNineFiveZeroTechnologyDriveMember_E23EBC24D03A24BC3F091D1E4A04775C_label_en-US" xlink:label="lab_fr_TwoNineFiveZeroTechnologyDriveMember_E23EBC24D03A24BC3F091D1E4A04775C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Two Nine Five Zero Technology Drive [Member]</link:label>
    <link:label id="lab_fr_TwoNineFiveZeroTechnologyDriveMember_E23EBC24D03A24BC3F091D1E4A04775C_documentation_en-US" xlink:label="lab_fr_TwoNineFiveZeroTechnologyDriveMember_E23EBC24D03A24BC3F091D1E4A04775C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Two nine five zero technology drive.</link:label>
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    <link:label id="lab_fr_ThreeEightZeroOneToThreeEightFiveOneYaleStMember_8C0714157D573D0167281D1E4A09115D_documentation_en-US" xlink:label="lab_fr_ThreeEightZeroOneToThreeEightFiveOneYaleStMember_8C0714157D573D0167281D1E4A09115D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Three Eight Zero One To Three Eight Five One Yale St [Member]</link:label>
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    <link:label id="lab_fr_ThreeThreeThreeSevenAndThreeThreeFourSevenRauchStreetMember_9014CC043D9A7F979D201D1E4A094AD8_terseLabel_en-US" xlink:label="lab_fr_ThreeThreeThreeSevenAndThreeThreeFourSevenRauchStreetMember_9014CC043D9A7F979D201D1E4A094AD8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">3337-3347 Rauch Street [Member]</link:label>
    <link:label id="lab_fr_ThreeThreeThreeSevenAndThreeThreeFourSevenRauchStreetMember_9014CC043D9A7F979D201D1E4A094AD8_label_en-US" xlink:label="lab_fr_ThreeThreeThreeSevenAndThreeThreeFourSevenRauchStreetMember_9014CC043D9A7F979D201D1E4A094AD8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Three Three Three Seven And Three Three Four Seven Rauch Street [Member]</link:label>
    <link:label id="lab_fr_ThreeThreeThreeSevenAndThreeThreeFourSevenRauchStreetMember_9014CC043D9A7F979D201D1E4A094AD8_documentation_en-US" xlink:label="lab_fr_ThreeThreeThreeSevenAndThreeThreeFourSevenRauchStreetMember_9014CC043D9A7F979D201D1E4A094AD8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Three three three seven and three three four seven Rauch Street.</link:label>
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    <link:label id="lab_fr_EightFiveZeroFiveNLoopEastMember_9A5CE188E3DD4E5940AE1D1E4A09C911_terseLabel_en-US" xlink:label="lab_fr_EightFiveZeroFiveNLoopEastMember_9A5CE188E3DD4E5940AE1D1E4A09C911" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">8505 N Loop East [Member]</link:label>
    <link:label id="lab_fr_EightFiveZeroFiveNLoopEastMember_9A5CE188E3DD4E5940AE1D1E4A09C911_label_en-US" xlink:label="lab_fr_EightFiveZeroFiveNLoopEastMember_9A5CE188E3DD4E5940AE1D1E4A09C911" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Eight Five Zero Five N Loop East [Member]</link:label>
    <link:label id="lab_fr_EightFiveZeroFiveNLoopEastMember_9A5CE188E3DD4E5940AE1D1E4A09C911_documentation_en-US" xlink:label="lab_fr_EightFiveZeroFiveNLoopEastMember_9A5CE188E3DD4E5940AE1D1E4A09C911" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Eight five zero five N Loop East.</link:label>
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    <link:label id="lab_fr_FourSevenFourNinetoFourSevenNineNineEastparkDrMember_A1879A132A62F70BD5F41D1E4A0AC632_terseLabel_en-US" xlink:label="lab_fr_FourSevenFourNinetoFourSevenNineNineEastparkDrMember_A1879A132A62F70BD5F41D1E4A0AC632" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">4749-4799 Eastpark Dr [Member]</link:label>
    <link:label id="lab_fr_FourSevenFourNinetoFourSevenNineNineEastparkDrMember_A1879A132A62F70BD5F41D1E4A0AC632_label_en-US" xlink:label="lab_fr_FourSevenFourNinetoFourSevenNineNineEastparkDrMember_A1879A132A62F70BD5F41D1E4A0AC632" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Four Seven Four Nine to Four Seven Nine Nine Eastpark Dr [Member]</link:label>
    <link:label id="lab_fr_FourSevenFourNinetoFourSevenNineNineEastparkDrMember_A1879A132A62F70BD5F41D1E4A0AC632_documentation_en-US" xlink:label="lab_fr_FourSevenFourNinetoFourSevenNineNineEastparkDrMember_A1879A132A62F70BD5F41D1E4A0AC632" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Four seven four nine to four seven nine nine Eastpark Dr.</link:label>
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    <link:label id="lab_fr_FourEightFiveOneHomesteadRoadMember_9CCD6B537B9B652F5D4A1D1E4A0AE6A7_terseLabel_en-US" xlink:label="lab_fr_FourEightFiveOneHomesteadRoadMember_9CCD6B537B9B652F5D4A1D1E4A0AE6A7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">4851 Homestead Road [Member]</link:label>
    <link:label id="lab_fr_FourEightFiveOneHomesteadRoadMember_9CCD6B537B9B652F5D4A1D1E4A0AE6A7_label_en-US" xlink:label="lab_fr_FourEightFiveOneHomesteadRoadMember_9CCD6B537B9B652F5D4A1D1E4A0AE6A7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Four Eight Five One Homestead Road [Member]</link:label>
    <link:label id="lab_fr_FourEightFiveOneHomesteadRoadMember_9CCD6B537B9B652F5D4A1D1E4A0AE6A7_documentation_en-US" xlink:label="lab_fr_FourEightFiveOneHomesteadRoadMember_9CCD6B537B9B652F5D4A1D1E4A0AE6A7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Four eight five one Homestead Road.</link:label>
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    <link:label id="lab_fr_ThreeThreeSixFivetoThreeThreeEightFiveRauchStreetMember_3FC374EB648C8DFDA3791D1E4A0A49DD_label_en-US" xlink:label="lab_fr_ThreeThreeSixFivetoThreeThreeEightFiveRauchStreetMember_3FC374EB648C8DFDA3791D1E4A0A49DD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Three Three Six Five to Three Three Eight Five Rauch Street [Member]</link:label>
    <link:label id="lab_fr_ThreeThreeSixFivetoThreeThreeEightFiveRauchStreetMember_3FC374EB648C8DFDA3791D1E4A0A49DD_documentation_en-US" xlink:label="lab_fr_ThreeThreeSixFivetoThreeThreeEightFiveRauchStreetMember_3FC374EB648C8DFDA3791D1E4A0A49DD" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Three three six five to three three eight five Rauch Street.</link:label>
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    <link:label id="lab_fr_FiveZeroFiveZeroCampbellRoadMember_9808568170794CCC89441D1E4A0AEDC7_terseLabel_en-US" xlink:label="lab_fr_FiveZeroFiveZeroCampbellRoadMember_9808568170794CCC89441D1E4A0AEDC7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">5050 Campbell Road [Member]</link:label>
    <link:label id="lab_fr_FiveZeroFiveZeroCampbellRoadMember_9808568170794CCC89441D1E4A0AEDC7_label_en-US" xlink:label="lab_fr_FiveZeroFiveZeroCampbellRoadMember_9808568170794CCC89441D1E4A0AEDC7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Five Zero Five Zero Campbell Road [Member]</link:label>
    <link:label id="lab_fr_FiveZeroFiveZeroCampbellRoadMember_9808568170794CCC89441D1E4A0AEDC7_documentation_en-US" xlink:label="lab_fr_FiveZeroFiveZeroCampbellRoadMember_9808568170794CCC89441D1E4A0AEDC7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Five zero five zero Campbell Road.</link:label>
    <link:loc xlink:href="fr-20191231.xsd#fr_FiveZeroFiveZeroCampbellRoadMember" xlink:label="loc_fr_FiveZeroFiveZeroCampbellRoadMember_9808568170794CCC89441D1E4A0AEDC7" xlink:type="locator" />
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    <link:label id="lab_fr_FourThreeZeroZeroPineTimbersMember_B67A9678A0C4A7DFEB021D1E4A0A73DC_terseLabel_en-US" xlink:label="lab_fr_FourThreeZeroZeroPineTimbersMember_B67A9678A0C4A7DFEB021D1E4A0A73DC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">4300 Pine Timbers [Member]</link:label>
    <link:label id="lab_fr_FourThreeZeroZeroPineTimbersMember_B67A9678A0C4A7DFEB021D1E4A0A73DC_label_en-US" xlink:label="lab_fr_FourThreeZeroZeroPineTimbersMember_B67A9678A0C4A7DFEB021D1E4A0A73DC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Four Three Zero Zero Pine Timbers [Member]</link:label>
    <link:label id="lab_fr_FourThreeZeroZeroPineTimbersMember_B67A9678A0C4A7DFEB021D1E4A0A73DC_documentation_en-US" xlink:label="lab_fr_FourThreeZeroZeroPineTimbersMember_B67A9678A0C4A7DFEB021D1E4A0A73DC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Four three zero zero Pine Timbers.</link:label>
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    <link:label id="lab_fr_TwoFiveZeroZerotoTwoFiveThreeZeroFairwayParkDriveMember_0B5273AF5165B26C8E7D1D1E4A0B0A6F_terseLabel_en-US" xlink:label="lab_fr_TwoFiveZeroZerotoTwoFiveThreeZeroFairwayParkDriveMember_0B5273AF5165B26C8E7D1D1E4A0B0A6F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2500-2530 Fairway Park Drive [Member]</link:label>
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    <link:label id="lab_fr_TwoFiveZeroZerotoTwoFiveThreeZeroFairwayParkDriveMember_0B5273AF5165B26C8E7D1D1E4A0B0A6F_documentation_en-US" xlink:label="lab_fr_TwoFiveZeroZerotoTwoFiveThreeZeroFairwayParkDriveMember_0B5273AF5165B26C8E7D1D1E4A0B0A6F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Two five zero zero to two five three zero Fairway Park Drive.</link:label>
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    <link:label id="lab_fr_SixFiveFiveZeroLongpointeMember_18FF7719D1955D0F3CBB1D1E4A0B5361_documentation_en-US" xlink:label="lab_fr_SixFiveFiveZeroLongpointeMember_18FF7719D1955D0F3CBB1D1E4A0B5361" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Six five five zero Longpointe.</link:label>
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    <link:label id="lab_fr_OneEightOneFiveTurningBasinDrMember_19C2F2484B9B5A57770B1D1E4A0BBCBC_documentation_en-US" xlink:label="lab_fr_OneEightOneFiveTurningBasinDrMember_19C2F2484B9B5A57770B1D1E4A0BBCBC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">One eight one five Turning Basin Dr.</link:label>
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