title: Comparison of bigrams between lists
body: <p>I've got 2 lists with bigrams in them. E.g: </p>
  
  <pre><code>List1 = [('bribe charge'), ('brilliant loss'),  ('brisk isolated'), ('brutal divorce')]
  List2 = [['bribe', 'charge'], ['a', 'baby'], ['a', 'shoe'], ['a', 'brisk'], ['the', 'goat']]
  </code></pre>
  
  <p>So I want to check and compare the 2 lists and check for the bigrams that are the same in both lists and output it. 
  So the desired output should be : <code>"bribe charge."</code></p>
  
  <p>Any help would be greatly appreciated</p>