title: NLTK - when to normalize the text?
body: <p>I've finished gathering my data I plan to use for my corpus, but I'm a bit confused about whether I should normalize the text. I plan to tag &amp; chunk the corpus in the future. Some of NLTK's corpora are all lower case and others aren't.</p>
  
  <p>Can anyone shed some light on this subject, please?</p>