code: def run(self, line):
          
          words = []
          for word in self.clean_unicode(line.lower()).split():
              if word.startswith('http'):
                  continue
              cleaned = self.clean_punctuation(word)
              if len(cleaned) > 1 and cleaned not in self.stopwords:
                  words.append(cleaned)
          return words
docs: Extract words from tweet
  
          1. Remove non-ascii characters
          2. Split line into individual words
          3. Clean up puncuation characters