title: What is the available TAGSET pattern for NLTK
body: <p>I know that you can get the set of word with its tag (e.g. for brown text) by using this:</p>
  
  <p><code>brown.tagged_set()</code></p>
  
  <p>And you can also change the pattern of the tagset like this:</p>
  
  <p><code>brown.tagged_set(tagset="universal")</code></p>
  
  <p>What is the available tag pattern that I can use? </p>