title: Why NLTK lemmatization has wrong output even if verb.exc has added right value?
body: <p>When I open verb.exc, I can see</p>
  
  <pre><code>saw see
  </code></pre>
  
  <p>While I use lemmatization in code</p>
  
  <pre><code>&gt;&gt;&gt;print lmtzr.lemmatize('saw', 'v')
  saw
  </code></pre>
  
  <p>How can this happen? Do I misunderstand in revising wordNet?</p>