class_docstr: This version of SquAD inherits from the Default Teacher.
  
  The only
  difference is that the 'text' field of an observation will contain
  the title of the article separated by a newline from the paragraph and the
  query.
  Note: The title will contain underscores, as it is the part of the link for
  the Wikipedia page; i.e., the article is at the site:
  https://en.wikipedia.org/wiki/{TITLE}
  Depending on your task, you may wish to remove underscores.
code: def __init__(self, opt, shared=None):
      self.id = "squad_title"
      build(opt)
      super().__init__(opt, shared)
  
imports: from typing import Optional
  from parlai.core.params import ParlaiParser
  from parlai.core.opt import Opt
  from parlai.core.teachers import FixedDialogTeacher, DialogTeacher
  from parlai.utils.io import PathManager
  from .build import build
  import json
  import os
label_desc: Use image node_id 1 to create a new TitleTeacher object from inherited base classes: DefaultTeacher with example: obj = TitleTeacher(opt, shared)