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      <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" xlink:label="ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" xlink:type="locator"/>
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      <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_ProceedsFromSalesOfIntangibleAssetsClassifiedAsInvestingActivities" xlink:label="ifrs-full_ProceedsFromSalesOfIntangibleAssetsClassifiedAsInvestingActivities" xlink:type="locator"/>
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      <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" xlink:label="ifrs-full_ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" xlink:type="locator"/>
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      <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities" xlink:label="ifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities" xlink:type="locator"/>
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      <link:loc xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" xlink:label="ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" xlink:type="locator"/>
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      <link:loc xlink:href="724500Y5L5UIEYCJCZ03-2021-12-31.xsd#ext_BrxnAdjustmentsForDecreaseIncreaseInRestrictedCash" xlink:label="ext_BrxnAdjustmentsForDecreaseIncreaseInRestrictedCash" xlink:type="locator"/>
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      <link:loc xlink:href="724500Y5L5UIEYCJCZ03-2021-12-31.xsd#ext_BrxnNonControllingInterestsOnAcquisitionOfSubsidiary" xlink:label="ext_BrxnNonControllingInterestsOnAcquisitionOfSubsidiary" xlink:type="locator"/>
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      <link:loc xlink:href="724500Y5L5UIEYCJCZ03-2021-12-31.xsd#ext_BrxnRecognitionOfPutOptionLiability" xlink:label="ext_BrxnRecognitionOfPutOptionLiability" xlink:type="locator"/>
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      <link:loc xlink:href="724500Y5L5UIEYCJCZ03-2021-12-31.xsd#ext_BrxnUnappropriatedResult" xlink:label="ext_BrxnUnappropriatedResult" xlink:type="locator"/>
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