text: import collections
  import nltk.metrics
  from nltk.metrics import precision, recall, f_measure
  from nltk.classify import NaiveBayesClassifier
  from nltk.corpus import movie_reviews
  from nltk.corpus import stopwords
  
  import itertools
  from nltk.collocations import BigramCollocationFinder
  from nltk.metrics import BigramAssocMeasures
  from nltk.probability import FreqDist, ConditionalFreqDist
  
  for word in movie_reviews.words(categories=['pos']):
      print(word)