code: def sentences(self, nb=3, ext_word_list=None):
          
          return [self.sentence(ext_word_list=ext_word_list)
                  for _ in range(0, nb)]
docs: Generate an array of sentences
          :example ['Lorem ipsum dolor sit amet.', 'Consectetur adipisicing eli.']
  
          Keyword arguments:
          :param nb: how many sentences to return
          :param ext_word_list: a list of words you would like to have instead of
              'Lorem ipsum'.
  
          :rtype: list