title: Python Sequential Dictionary
body: <p>How do you create a dictionary (e.g. food_dictionary) with the keys being the unique words in 'word_list' and the value being the list of words immediately following it (i.e. for words that have a word immediately following it)?</p>
  
  <pre><code>word_list = [ ['always', 'want', 'pizza' ], ['we', 'want', 'potato', 'chips' ] ]
  
  food_dictionary = { 'always' : ['want'], 'want': ['pizza', 'potato'], 'we': ['want'], potato': ['chips'] }
  </code></pre>