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  <xs:element id="pwp_TsaMember" abstract="true" name="TsaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
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  <xs:element id="pwp_SponsorMember" abstract="true" name="SponsorMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
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  <xs:element id="pwp_MarketConditionSharePriceAchieved" abstract="false" name="MarketConditionSharePriceAchieved" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="num:perShareItemType"/>
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  <xs:element id="pwp_PreferredAndCommonStockSharesAuthorized" abstract="false" name="PreferredAndCommonStockSharesAuthorized" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="pwp_MaximumAmountOfRevolvingCreditFacilityForLettersOfCredit" abstract="false" name="MaximumAmountOfRevolvingCreditFacilityForLettersOfCredit" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="pwp_OperatingLeaseLiabilitiesNetMinimumPaymentsDueAbstract" abstract="true" name="OperatingLeaseLiabilitiesNetMinimumPaymentsDueAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="pwp_PipeInvestorsMember" abstract="true" name="PipeInvestorsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
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  <xs:element id="pwp_OthersMember" abstract="true" name="OthersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="pwp_AmountOfDilutiveSecuritiesOtherUnits" abstract="false" name="AmountOfDilutiveSecuritiesOtherUnits" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="pwp_IncrementalCommonSharesAttributableToExchangeOfOtherUnits" abstract="false" name="IncrementalCommonSharesAttributableToExchangeOfOtherUnits" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="pwp_CommonStockForfeitedValuePerShare" abstract="false" name="CommonStockForfeitedValuePerShare" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="num:perShareItemType"/>
</xs:schema>
