Get specific data group from BI report

Hi,

request := '<?xml version="1.0" encoding="UTF-8"?>

                  <soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope" xmlns:pub="http://xmlns.oracle.com/oxp/service/PublicReportService"> 

      <soap:Header/>

      <soap:Body>

       <pub:runReport>

         <pub:reportRequest>

          <pub:reportAbsolutePath>/Custom/Integrations/Reports/Test_Report.xdo</pub:reportAbsolutePath>

          <pub:sizeOfDataChunkDownload>-1</pub:sizeOfDataChunkDownload>

         </pub:reportRequest>

         <pub:appParams></pub:appParams>

       </pub:runReport>

      </soap:Body>

    </soap:Envelope>';

Using the above SOAP envelope I am able to pull data from Fusion BI report to ADB.

Suppose if there are two data group say G_1 and G_2 how do I refer in the SOAP envelope to pull data from either G_1 or G_2