title: ImportError: No module named simplify
body: <p>I am getting the following error when trying to import <code>simplify_wsj_tag</code>:</p>
  
  <pre><code> File "parser-test2.py", line 2, in &lt;module&gt;
      from nltk.tag.simplify import simplify_wsj_tag
  ImportError: No module named simplify
  </code></pre>
  
  <p>The code is very simple:</p>
  
  <pre><code>import nltk
  from nltk.tag.simplify import simplify_wsj_tag
  </code></pre>
  
  <p>I have <code>nltk</code> installed so I'm not sure why this error is coming up.</p>