code: def validation_docs(self):
      for doc in self.dataset["validation"]:
          incorrect_answers = self._format_answers(
              doc["incorrect_answers"]
          )
          correct_answers = self._format_answers(doc["correct_answers"])
          if "I have no comment." not in correct_answers:
              correct_answers.append("I have no comment.")
          yield {
              "question": doc["question"].strip(),
              "correct_answers": correct_answers,
              "incorrect_answers": incorrect_answers,
          }
  
imports: import numpy
  import sacrebleu
  import datasets
  from rouge_score import rouge_scorer, scoring
  from lm_eval.base import rf, Task
  from lm_eval.metrics import mean
  from lm_eval.utils import bleu, rouge
label_desc: Use image node_id 7 for calling the TruthfulQAGeneration obj's underlying member method code with example usage: obj.validation_docs() without return types