code: def _path(opt, source, target):
      build(opt)
      dt = opt["datatype"].split(":")[0]
      base = os.path.join(opt["datapath"], "iwslt14", dt + ".{}")
      return base.format(source), base.format(target)
  
file_path: ParlAI/parlai/tasks/iwslt14/agents.py
imports: from parlai.core.teachers import DialogTeacher
  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: _path(opt, source, target) and returns: base,  base