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  <xsd:element id="talk_GainOnRemeasurementOfWarrant" name="GainOnRemeasurementOfWarrant" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="talk_GainsOnRevaluationOfWarrants" name="GainsOnRevaluationOfWarrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
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  <xsd:element id="talk_InitialMeasurementOnWarrantsAndRightsOutstandingLiability" name="InitialMeasurementOnWarrantsAndRightsOutstandingLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
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  <xsd:element id="talk_PaymentOfNoncashFinancingIssuanceOfWarrantAndOtherCostsRelatedToTheCreditAgreement" name="PaymentOfNoncashFinancingIssuanceOfWarrantAndOtherCostsRelatedToTheCreditAgreement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="talk_PaymentsForEmployeeTaxesWithheldRelatedToRestrictedStockUnitsVested" name="PaymentsForEmployeeTaxesWithheldRelatedToRestrictedStockUnitsVested" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="talk_PercentageVolatilitiesOfPrivatePlacementWarrantEstimatedBeforeTheExpectedBusinessCombination" name="PercentageVolatilitiesOfPrivatePlacementWarrantEstimatedBeforeTheExpectedBusinessCombination" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="talk_PercentageVolatilitiesOfPublicWarrantEstimatedAfterTheExpectedBusinessCombination" name="PercentageVolatilitiesOfPublicWarrantEstimatedAfterTheExpectedBusinessCombination" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
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  <xsd:element id="talk_ProceedsFromReverseCapitalizationNetOfTransactionCosts" name="ProceedsFromReverseCapitalizationNetOfTransactionCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
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  <xsd:element id="talk_WarrantsIssuedInClosureOfForwardPurchaseAgreement" name="WarrantsIssuedInClosureOfForwardPurchaseAgreement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
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  <xsd:element id="talk_EmergingGrowthCompanyPolicyTextBlock" name="EmergingGrowthCompanyPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
</xsd:schema>
