class_docstr: Yelp MD Gender Teacher.
code: def get(self, episode_idx, entry_idx=0):
      ep = self.data[episode_idx]
      ep["label_candidates"] = self.label_candidates[ep["class_type"]]
      ep["id"] = "Yelp Gender"
      ep["episode_done"] = True
      return Message(ep)
  
imports: from typing import Optional
  from parlai.core.params import ParlaiParser
  from parlai.core.opt import Opt
  from parlai.core.message import Message
  from parlai.core.teachers import FixedDialogTeacher
  from parlai.utils.io import PathManager
  import parlai.tasks.md_gender.utils
  import parlai.utils.logging
  from copy import deepcopy
  import os
  import random
  import sys
label_desc: Use image node_id 6 for calling the YelpTeacher obj's underlying member method code with example usage: obj.get(episode_idx, entry_idx) and returns: Message