code: def setup_data(self, path):
      print("loading: " + path)
      with PathManager.open(path) as data_file:
          data = json.load(data_file)["Data"]
      for datapoint in data:
          question = datapoint["Question"]
          answers = [datapoint["Answer"]["Value"]] + sorted(
              list(set(datapoint["Answer"]["Aliases"]))
          )
          yield (question, answers), True
  
imports: from parlai.core.teachers import DialogTeacher, MultiTaskTeacher
  from parlai.utils.io import PathManager
  from .build import build
  import copy
  import json
  import os
label_desc: Use image node_id 2 for calling the NoEvidenceUnionTeacher obj's underlying member method code with example usage: obj.setup_data(path) without return types