code: def _setup_data(self, path):
      super()._setup_data(path)
      if not self.opt["recovery"]:
          for i, ep in enumerate(self.episodes):
              # make the signaling msg the label and remove the recovery msg
              texts = ep[0]["text"].split("\n")
              self.episodes[i][0].force_set(
                  "text", "\n".join(texts[:-1])
              )
              self.episodes[i][0].force_set("labels", [texts[-1]])
  
imports: from typing import Optional
  from parlai.core.params import ParlaiParser
  from parlai.core.opt import Opt
  import os
  import copy
  from parlai.core.teachers import ParlAIDialogTeacher
  from .build import build
label_desc: Use image node_id 3 for calling the SaferDialoguesBADTeacher obj's underlying member method code with example usage: obj._setup_data(path) without return types