code: def get_data_for_fold(self, fold):
      yield {Q: Q, A: A, R: R}
  
imports: import unittest
  from parlai.core.params import ParlaiParser
  import parlai.utils.testing
  from parlai.tasks.reasoning.base import AbstractQuestionAnswer, AbstractReason, AbstractReasoningTeacher
  from dataclasses import dataclass
label_desc: Use image node_id 4 for calling the DummyAbstractReasoningTeacher obj's underlying member method code with example usage: obj.get_data_for_fold(fold) without return types