code: def _process_doc(self, doc):
      out_doc = {
          "query": f"{doc['context']}\nQuestion: {doc['ex_question']}\nAnswer:",
          "choices": [doc["A"], doc["B"], doc["C"], doc["D"]],
          "gold": doc["label"],
      }
      return out_doc
  
file_path: lm-evaluation-harness/lm_eval/tasks/prost.py
imports: from lm_eval.base import MultipleChoiceTask
label_desc: Use image node_id 6 for calling the PROST obj's underlying member method code with example usage: obj._process_doc(doc) and returns: out_doc