title: List Compherension with sublist
body: <p>Suppose I have a list of sublist:</p>
  
  <pre><code>lst = [ ['A', 'is', 'from', 'B,', '2', 'm', 'from', 'C', '1.2', 'm', 'from', 'D.'], 
          ['0.3', 'm', 'from', 'D.'] ]
  </code></pre>
  
  <p>and I wanted to organize the letters after the word "from" so I want to have </p>
  
  <pre><code>new_lst = [ [B,C,D], [D] ]
  </code></pre>