code: def _choose_sentence_path(opt):
      build(opt)
      datatype = opt["datatype"].split(":")[0]
      return os.path.join(
          opt["datapath"],
          "rephrase_sentences",
          "choose_sentence_" + datatype + ".txt",
      )
  
imports: from parlai.core.teachers import FbDeprecatedDialogTeacher, FixedDialogTeacher
  from parlai.utils.io import PathManager
  from .build import build
  import copy
  import os
label_desc: Use image node_id 2 for calling a global function with example usage: _choose_sentence_path(opt) and returns: os