code: def test_get_words(self):
      # test get words
      self.assertEqual(
          [
              "It",
              "'s",
              "the",
              "most",
              "well",
              "-",
              "known",
              "Arab",
              "monument",
              "in",
              "the",
              "world",
              "..",
          ],
          nmt_sample.get_words("source"),
      )
      self.assertEqual(
          [
              "Es",
              "ist",
              "das",
              "bekannteste",
              "arabische",
              "Bauwerk",
              "auf",
              "der",
              "ganzen",
              "Welt",
              "...",
          ],
          nmt_sample.get_words("target"),
      )
  
file_path: textflint/test/input/component/sample/test_nmt_sample.py
imports: import unittest
  from textflint.input.component.sample.nmt_sample import *
label_desc: Use image node_id 2 for calling the TestNMTSample obj's underlying member method code with example usage: obj.test_get_words() without return types