code: def doc_to_text(self, doc):
      return QA_PROMPT + "\n\nQ: " + doc["question"] + "\nA:"
  
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 TruthfulQAMultipleChoice obj's underlying member method code with example usage: obj.doc_to_text(doc) and returns: unknown