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"]))
          )
          evidence_list = datapoint["EntityPages"]
  
          if self.no_evidence:
              yield (question, answers), True
          else:
              if len(evidence_list) == 0:
                  continue
  
              evidence = ""
              for evidence_item in evidence_list:
                  evidence_file_path = os.path.join(
                      self.evidence_dir,
                      "wikipedia",
                      evidence_item["Filename"],
                  )
                  with PathManager.open(
                      evidence_file_path
                  ) as evidence_file:
                      evidence += "Title: %s\n" % evidence_item["Title"]
                      evidence += evidence_file.read() + "\n\n"
  
              yield (evidence + 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 WikipediaTeacher obj's underlying member method code with example usage: obj.setup_data(path) without return types