title: Regex to extract string between two symbols
body: <p>I have a string like this</p>
  
  <blockquote>
    <p>Affiliation / Facility Name = Provider 1069860 # Admissions = 1 #
    Potentially Avoidable = 0</p>
  </blockquote>
  
  <p>I want a Regex Expression to extract the value Provider 1069860 from it. </p>
  
  <p>I tried "= [a-zA-Z]+ #" but it is giving a blank result</p>