title: AttributeError: 'function' object has no attribute 'split'
body: <pre><code>cfd = nltk.ConditionalFreqDist(
  (sense, def_word)
  for sense in senses
  for def_word in sense.definition.split()
  if def_word in tweet)
  </code></pre>
  
  <p>Dont know what does that error mean. Please help.</p>