docs: def crude_tokenizer(line):
      """This is a very crude tokenizer from pynlpl"""
      tokens = []
      buffer = ''
      for c in line.strip():
          if c == ' ' or c in string.punctuation:
              if buffer:
                  tokens.append(buffer)
                  buffer = ''
          else:
              buffer += c
      if buffer: tokens.append(buffer)
      return tokens