title: classify tweets using NLTK Python
body: <p>is there something we can do to classify the tweets using twitter_samples into : positive , negative ,and neutral , because I found just two files</p>
  <pre><code>positive_tweets = twitter_samples.strings('positive_tweets.json')
  negative_tweets = twitter_samples.strings('negative_tweets.json')
  </code></pre>
  <p>so how can we get score from</p>
  <pre><code>NaiveBayesClassifier.train(train_data).classify()
  </code></pre>
  <p>to classify to another category <strong>neutral</strong></p>