XML-Choosing Child Nodes-SQL

I am trying to write the correct SQL code, for a XML to SQL import that will allow me to choose between the below UnitNumber 1, 2, or 3. Please review. Right now When I use x.query I am returning all values for PersonName, which would be all PersonName's for UnitNumber 1,2,or 3 I need to just return the PersonName for Unit 1 then 2 and so on.

 <Units  xmlns="http://ift.tt/15aDqLg">
     <d3p1:VehichleUnit   xmlns:d3p1="http://ift.tt/15aDqLg"d3p1:UnitNumber="1">
    <PersonName>
     <PersonGivenName xmlns="http://ift.tt/1nOCPaB">Jim </PersonGivenName>
     <PersonLastName xmlns="http://ift.tt/1nOCPaB">Brown
      </PersonName>
      <d3p1:VehichleUnit   xmlns:d3p1="http://ift.tt/15aDqLg"d3p1:UnitNumber="2">
      <d3p1:VehichleUnit xmlns:d3p1="http://ift.tt/15aDqLg"d3p1:UnitNumber="3">
       </Units>

   WITH xmlnamespaces (DEFAULT 'http://ift.tt/1tNQ09G',
  'http://ift.tt/ra1lAU' as 
  dop,'http://ift.tt/15aDqLk' as   dop1,'http://ift.tt/1nOCPaB' as dop2, 
  'http://ift.tt/15aDqLg' as     d3p1,'http://ift.tt/1ysjSxT' as dop3)
  INSERT INTO  ACRSVehicle   (LocalCaseNumber,GoingDirection ,ContinueDirection,CitationIssued,AtFault,Citati     onCode,DriverFirstName) 
 SELECT  X.p.query  ('/ACRSReport/d3p1:Units//dop3:Driver/dop3:PersonName/dop2:PersonGivenName').val     ue('.', 'VARCHAR(25)')
 FROM ( SELECT CAST(x AS XML)
 FROM OPENROWSET(BULK 'D:ACRS\MONTGOMERY_acrs_MCP0036000Q.xml',SINGLE_BLOB) 
 AS T(x)) 
 AS T(x)CROSS APPLY x.nodes('/ACRSReport') AS X(p) ;