class_docstr: Sequence of utterances and responses with background knowledge about movies.
  
  From the Holl-E dataset. More information found at
  https://github.com/nikitacs16/Holl-E.
class_docstr_tok: ["Sequence","of","utterances","and","responses","with","background","knowledge","about","movies",".","From","the","Holl-E","dataset",".","More","information","found","at","https",":","\/\/github.com\/nikitacs16\/Holl-E","."]
code: def num_episodes(self):
      return len(self.episodes)
  
imports: from typing import Optional
  from parlai.core.params import ParlaiParser
  from parlai.core.opt import Opt
  from parlai.core.teachers import FixedDialogTeacher
  from parlai.utils.io import PathManager
  from .build import build
  import json
  import os
label_desc: Use image node_id 7 for calling the HollETeacher obj's underlying member method code with example usage: obj.num_episodes() and returns: len