title: <listRel:entityId>(.*?)<\/listRel:entityId>
body: <p>Good day.</p>
  
  <p>My work requires me to query and get response from it. I cannot seem to remove the letters or name on this Match group. I need to get just the numbers 917857</p>
  
  <p>I use rubular to check if the match is correct.</p>
  
  <p>917857 James Bond</p>