code: def test_two_sentences():
      document = build_document(
          ("Já jsem 1. věta", "A já ta 2. vítězná výhra")
      )
      summarizer = LuhnSummarizer()
      summarizer.stop_words = (
          "já",
          "jsem",
          "a",
          "ta",
      )
  
      returned = summarizer(document, 10)
      assert list(map(to_unicode, returned)) == [
          "Já jsem 1. věta",
          "A já ta 2. vítězná výhra",
      ]
  
file_path: sumy/tests/test_summarizers/test_luhn.py
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  from sumy._compat import to_unicode
  from sumy.nlp.stemmers.czech import stem_word
  from sumy.nlp.tokenizers import Tokenizer
  from sumy.parsers.plaintext import PlaintextParser
  from sumy.summarizers.luhn import LuhnSummarizer
  from sumy.utils import get_stop_words
  from ..utils import build_document
label_desc: Use image node_id 3 for calling a global function with example usage: test_two_sentences() without return types