code: def test_split_into_words():
      sentences1 = PlaintextParser.from_string(
          "One, two two. Two. Three.", Tokenizer("english")
      ).document.sentences
      assert ["One", "two", "two", "Two", "Three"] == _split_into_words(
          sentences1
      )
      sentences2 = PlaintextParser.from_string(
          "two two. Two. Three.", Tokenizer("english")
      ).document.sentences
      assert ["two", "two", "Two", "Three"] == _split_into_words(
          sentences2
      )
  
file_path: sumy/tests/test_evaluation/test_evaluation_rouge.py
imports: from __future__ import absolute_import
  from __future__ import division, print_function, unicode_literals
  from pytest import approx
  from sumy.evaluation import rouge_n, rouge_l_sentence_level, rouge_l_summary_level
  from sumy.evaluation.rouge import _get_ngrams, _split_into_words, _get_word_ngrams, _len_lcs, _recon_lcs, _union_lcs
  from sumy.nlp.tokenizers import Tokenizer
  from sumy.parsers.plaintext import PlaintextParser
label_desc: Use image node_id 2 for calling a global function with example usage: test_split_into_words() without return types