code: def example_train_sample(self):
      return {
          "question": "A question",
          "answer": {"text": ["The answer"], "answer_start": [0]},
          "context": "The paragraph of text which contains the answer to the question",
          "id": 0,
      }
  
file_path: lightning-flash/tests/text/question_answering/test_model.py
imports: import collections
  from typing import Any
  import pytest
  import torch
  from flash.core.utilities.imports import _TOPIC_TEXT_AVAILABLE
  from flash.text import QuestionAnsweringTask
  from torch import Tensor
  from tests.helpers.task_tester import TaskTester
label_desc: Use image node_id 3 for calling the TestQuestionAnsweringTask obj's underlying member method code with example usage: obj.example_train_sample() and returns: dict