def extend_columns(sentences, columns):
  """Extend column to list of sentences
  
  Args:
      sentences (list): 
        Sentences is a list of sentences.
        Sentence is a list of token information.
        Token information is in format: [token, feature_1, ..., feature_n, tag_label] 
      columns (list): Same format as sentence
  
  Returns:
      new_sentences: same format as sentences
  """
  new_sentences = []
  for sentence, column in zip(sentences, columns):
    new_sentences.append(
        [tup + col for tup, col in zip(sentence, column)]
    )
  return new_sentences