title: How do you extract keywords based on surrounding characters
body: <p>Trying to extract keywords from a string in R but so far unable to find a solution</p>
  
  <p>Giving the string</p>
  
  <pre><code>"erj\"abc\"ejwojeowje \"123\"fjoejfoejf" 
  </code></pre>
  
  <p>How to extract the keywords <code>"abc"</code> and <code>"123"</code> into a character vector?
  I tried using <code>strsplit</code> based on <code>\"</code> but it would also return other unnecessary keywords.</p>