code: def test_from_json_with_field(tmpdir):
      json_path = json_data_with_field(tmpdir, TEST_JSON_DATA)
      dm = QuestionAnsweringData.from_json(
          question_column_name="question",
          context_column_name="context",
          answer_column_name="answer",
          train_file=json_path,
          field="data",
          batch_size=2,
      )
      batch = next(iter(dm.train_dataloader()))
      assert isinstance(batch["question"][0], str)
      assert isinstance(batch["context"][0], str)
      assert isinstance(batch["answer"], dict)
  
file_path: lightning-flash/tests/text/question_answering/test_data.py
imports: import json
  import os
  from pathlib import Path
  import pandas
  import pytest
  from flash.core.utilities.imports import _TOPIC_TEXT_AVAILABLE
  from flash.text import QuestionAnsweringData
label_desc: Use image node_id 8 for calling a global function with example usage: test_from_json_with_field(tmpdir) without return types