class_docstr: OntoNotes coreference data, from edge probing format.
  
  To get the edge probing data, see instructions at
  https://github.com/nyu-mll/jiant-v1-legacy/tree/master/probing/data#ontonotes
code: def spec(self):
      return {
          "text": lit_types.TextSegment(),
          "tokens": lit_types.Tokens(parent="text"),
          "coref": lit_types.EdgeLabels(align="tokens"),
      }
  
file_path: lit/lit_nlp/examples/coref/datasets/ontonotes.py
imports: import json
  from lit_nlp.api import dataset
  from lit_nlp.api import dtypes
  from lit_nlp.api import types
label_desc: Use image node_id 3 for calling the OntonotesCorefDataset obj's underlying member method code with example usage: obj.spec() and returns: dict