class_docstr: Basic dialogue teacher where label is human.
class_docstr_tok: ["Basic","dialogue","teacher","where","label","is","human","."]
code: def _teacher_type(self):
      return Teachers.BB3_DATA_HUMAN_TEACHER
  
imports: import os
  import json
  from copy import deepcopy
  from parlai.core.message import Message
  from parlai.utils.data import DatatypeHelper
  from parlai.core.teachers import ChunkTeacher
  from .build import build
label_desc: Use image node_id 2 for calling the BB3DataHumanTeacher obj's underlying member method code with example usage: obj._teacher_type() and returns: Teachers