class_docstr: Full Wikipedia teacher that splits the chunks into train/valid/test.
class_docstr_tok: ["Full","Wikipedia","teacher","that","splits","the","chunks","into","train\/valid\/test","."]
code: def share(self):
      shared = super().share()
      shared["chunk_idx_to_file"] = self.chunk_idx_to_file
      return shared
  
imports: from parlai.core.teachers import DialogTeacher, ChunkTeacher, ChunkOutput
  from parlai.utils.io import PathManager
  from parlai.core.message import Message
  from .build import build
  import json
  import os
  from typing import List, Tuple
label_desc: Use image node_id 8 for calling the FullSplitTeacher obj's underlying member method code with example usage: obj.share() and returns: shared