code: def test_prejudice_score(self):
      score1 = sub._score(
          NLISample(
              {
                  "hypothesis": "A young boy",
                  "premise": "A young girl",
                  "y": "entailment",
              }
          ),
          fields=["hypothesis", "premise"],
      )
      score2 = sub._score(
          NLISample(
              {
                  "hypothesis": "A young boy",
                  "premise": "A young boy",
                  "y": "entailment",
              }
          ),
          fields=["hypothesis", "premise"],
      )
      self.assertEqual(score1, 0)
      self.assertEqual(score2, 1)
  
imports: import unittest
  from textflint.generation.subpopulation.UT import PrejudiceSubPopulation
  from textflint.input.component.sample import NLISample
label_desc: Use image node_id 1 for calling the TestPrejudiceSubPopulation obj's underlying member method code with example usage: obj.test_prejudice_score() without return types