code: def __init__(self, opt, shared=None):
      opt["character"] = "Rachel Green"
      super().__init__(opt, shared)
  
imports: from typing import Optional
  from parlai.core.opt import Opt
  from parlai.core.teachers import DialogTeacher
  from parlai.core.params import ParlaiParser
  from .build import build
  from collections import defaultdict
  import jsonlines
  from parlai.utils.data import DatatypeHelper
  import random
  import copy
  import os
label_desc: Use image node_id 1 to create a new RachelTeacher object from inherited base classes: DefaultTeacher with example: obj = RachelTeacher(opt, shared)