code: def context_features(self, text):
      pos_tags = self._pos(text)
      word_nouns = self.extract_nouns(pos_tags)
      return word_nouns
  
imports: from sematch.utility import FileIO
  from nltk.stem import WordNetLemmatizer
  from nltk.corpus import wordnet
  import nltk
  from collections import Counter
  import itertools
  import string
  import re
label_desc: Use image node_id 6 for calling the FeatureExtractor obj's underlying member method code with example usage: obj.context_features(text) and returns: word_nouns