code: def _setup_data(self):
      self.data = []
  
      def create_entry_single(episode):
          entry = []
          for key in EXISTING_KEYS:
              if key in episode:
                  entry.append(str(episode[key]))
              else:
                  entry.append("N/A")
          return entry
  
      def create_entry_multiple(episode):
          entries = []
  
          for question in episode["questions"]:
              new_episode = dict()
              new_episode["asin"] = episode["asin"]
              new_episode["askerID"] = question["askerID"]
              new_episode["questionTime"] = question["questionTime"]
              new_episode["quesitonType"] = question["questionType"]
              new_episode["question"] = question["questionText"]
  
              for answer in question["answers"]:
                  answer.update(new_episode)
                  answer["answer"] = answer["answerText"]
                  entries.append([create_entry_single(answer)])
  
          return entries
  
      fpath = os.path.join(self.opt["datapath"], "AmazonQA")
      for i, f in enumerate(RESOURCES):
          json_file = f.file_name[:-3]
          file_path = os.path.join(fpath, json_file)
  
          with PathManager.open(file_path, "r") as infile:
              data = infile.read()
              new_data = data.replace("}\n{", "},\n{")
              json_data = json.loads(f"[{new_data}]")
  
          for ep in json_data:
              # First 20 datasets have a different format than those later
              if i < 21:
                  self.data.append([create_entry_single(ep)])
              else:
                  self.data += create_entry_multiple(ep)
  
file_path: ParlAI/parlai/tasks/amazon_qa/agents.py
imports: from parlai.core.teachers import FixedDialogTeacher
  from parlai.utils.io import PathManager
  from .build import build, RESOURCES
  import os
  import json
label_desc: Use image node_id 4 for calling the DefaultTeacher obj's underlying member method code with example usage: obj._setup_data() and returns: entry, entries