old_contents: import nltk
  
  # Define a grammar, and identify the Noun Pairs and Noun PhRases in the
  # sentences.
  # TODO: Look into using exclusive grammars to discard prepositional
  # phrases, and such.
  _chunk_parser_ = nltk.RegexpParser(r"""
  EMAIL: {<NN><:><JJ>}
  V: {<RB|RBR|RBS>*<VB|VBD|VBN|VBP|VBZ>}
  N: {<NN|NNS|NNP|NNPS|CD|EMAIL>+}
  PPR: {<IN>}
  NP: {<DT|PRP|PRP\$>?<JJ>*<N>?(<,>?<CC>?<N>)*}
  VP: {<V><PPR>?<NP>?}
  INDEP: {(<NP><VP>|<VP><NP>)}
  """)
  
  def identify_constructs(sentences):
      # If we are only given a single sentence, wrap it in a list.
      if len(sentences) > 0 and type(sentences[0]) != list:
          sentences = [sentences]
  
      return [_chunk_parser_.parse(sentence) for sentence in sentences]
  
  def independent_clauses(sentences):
      """Returns a flat list containing all independent clauses."""
      clauses = []
      trees = identify_constructs(sentences)
      for tree in trees:
          clauses.extend(tree.subtrees(lambda t: t.label() == "INDEP"))
  
      print(clauses)
      return clauses
  
new_contents: import nltk
  
  # Define a grammar, and identify the Noun Pairs and Noun PhRases in the
  # sentences.
  # TODO: Look into using exclusive grammars to discard prepositional
  # phrases, and such.
  _chunk_parser_ = nltk.RegexpParser(r"""
  EMAIL: {<NN><:><JJ>}
  V: {<RB|RBR|RBS>*<VB|VBD|VBN|VBP|VBZ>}
  N: {<NN|NNS|NNP|NNPS|CD|EMAIL>+}
  PPR: {<IN>}
  NP: {<DT|PRP|PRP\$>?<JJ>*<N>?(<,>?<CC>?<N>)*}
  VP: {<V><PPR>?<NP>?}
  INDEP: {(<NP><VP>|<VP><NP>)}
  """)
  
  def identify_constructs(sentences):
      # If we are only given a single sentence, wrap it in a list.
      if len(sentences) > 0 and type(sentences[0]) != list:
          sentences = [sentences]
  
      return [_chunk_parser_.parse(sentence) for sentence in sentences]
  
  def independent_clauses(sentences):
      """Returns a flat list containing all independent clauses."""
      clauses = []
      trees = identify_constructs(sentences)
      for tree in trees:
          clauses.extend(tree.subtrees(lambda t: t.label() == "INDEP"))
  
      return clauses
  
subject: Remove debugging print statement