code: def test_rank(self):
      QUESTION = "Who bears his memory?"
      answer, start_pos, end_pos, score = self.qa_model.get_answer(
          QUESTION, CONTEXT
      )
      self.assertEqual(answer, "His tender heir")
      self.assertEqual(answer, CONTEXT[start_pos:end_pos])
  
file_path: nboost/tests/unit/test_pt_distilbert_qa_model.py
imports: from nboost.plugins import resolve_plugin
  import unittest
label_desc: Use image node_id 2 for calling the TestPtDistilBertQAModel obj's underlying member method code with example usage: obj.test_rank() without return types