title: List of lists of words clustering
body: <p>Let's say I have a list of lists of words, for example</p>
  
  <pre><code>[['apple','banana'],
   ['apple','orange'],
   ['banana','orange'],
   ['rice','potatoes','orange'],
   ['potatoes','rice']]
  </code></pre>
  
  <p>The set is much bigger. I want to cluster the words that words usually existing together will have the same cluster. So in this case the clusters will be <code>['apple', 'banana', 'orange']</code> and <code>['rice','potatoes']</code>.<br>
  What is the best approach to archive this kind of clustering?</p>