code: def get_record_pos(self, record):
          
          if self.is_stopword_record(record):
              return '~' + record.pos
          else:
              return record.pos
docs: Given a record, get the word's part of speech.
  
          Here we're going to return MeCab's part of speech (written in
          Japanese), though if it's a stopword we prefix the part of speech
          with '~'.