title: How to extract sub-string before or after nth character
body: <p>I would like to extract the domain URL and resource identifier using REGEXTRACT.</p>
  
  <p>For example in </p>
  
  <p><code>http://www.examaple.com/identifier</code> </p>
  
  <p>I would like to extract the domain URL</p>
  
  <p><code>http://www.examaple.com</code> </p>
  
  <p>and the resource ID</p>
  
  <p><code>identifier</code> </p>
  
  <p>using the third forward slash <code>/</code> as a pivot.</p>
  
  <p>One cell should read </p>
  
  <p><code>http://www.examaple.com</code> </p>
  
  <p>and another cell should read. </p>
  
  <p><code>identifier</code> </p>