class_docstr: prompt template is taken from [ChatGPT vs BERT: どちらが日本語をより理解できるのか?](https://fintan.jp/page/9126/)
code: def training_docs(self):
      if self._training_docs is None:
          self._training_docs = list(
              map(self._process_doc, self.dataset["train"])
          )
      return self._training_docs
  
imports: import os
  from lm_eval.base import BalancedMultipleChoiceTask, rf
label_desc: Use image node_id 4 for calling the MARCJaWithFintanPrompt obj's underlying member method code with example usage: obj.training_docs() and returns: self