class_docstr:     Teacher which contains the question as the text, the sentences as the label
      candidates, and the label as the sentence containing the answer.
  
      Some punctuation may be removed for tokenization purposes.
  
      If `include_context` is False, the teacher returns action dict in the
      following format:
      {
          'context': <context>,
          'text': <question>,
          'labels': <sentences containing the true answer>,
          'label_candidates': <all sentences in the context>,
          'episode_done': True,
          'answer_starts': <index of start of answer in context>
      }
      Otherwise, the 'text' field contains <context>
  <question> and there is
      no separate context field.
      
class_docstr_tok: ["Teacher","which","contains","the","question","as","the","text",",","the","sentences","as","the","label","candidates",",","and","the","label","as","the","sentence","containing","the","answer",".","Some","punctuation","may","be","removed","for","tokenization","purposes",".","If","`","include_context","`","is","False",",","the","teacher","returns","action","dict","in","the","following","format",":","{","'context","'",":","<","context",">",",","'text","'",":","<","question",">",",","'labels","'",":","<","sentences","containing","the","true","answer",">",",","'label_candidates","'",":","<","all","sentences","in","the","context",">",",","'episode_done","'",":","True",",","'answer_starts","'",":","<","index","of","start","of","answer","in","context",">","}","Otherwise",",","the","'text","'","field","contains","<","context",">","<","question",">","and","there","is","no","separate","context","field","."]
code: def add_cmdline_args(
      cls, parser: ParlaiParser, partial_opt: Optional[Opt] = None
  ) -> ParlaiParser:
      super().add_cmdline_args(parser, partial_opt)
      agent = parser.add_argument_group(
          "SQuAD Fulldoc Sentence Teacher Arguments"
      )
      agent.add_argument(
          "--include-context",
          type="bool",
          default=False,
          help="include context within text instead of as a "
          "separate field",
      )
      return parser
  
imports: import copy
  import json
  import os
  from typing import Optional
  from parlai.core.params import ParlaiParser
  from parlai.core.message import Message
  from parlai.core.opt import Opt
  from parlai.core.teachers import FixedDialogTeacher, DialogTeacher, ParlAIDialogTeacher
  from parlai.tasks.wrapper.agents import AbstractWrapperTeacher
  from parlai.utils.io import PathManager
  from .build import build
label_desc: Use image node_id 2 for calling the FulldocsentenceTeacher obj's underlying member method code with example usage: obj.add_cmdline_args(cls, parser, partial_opt) and returns: parser