class_docstr: Stanford Sentiment Treebank, binary version (SST-2).
  
  See https://www.tensorflow.org/datasets/catalog/glue#gluesst2.
  This data is reformatted to serve the language models.
class_docstr_tok: ["Stanford","Sentiment","Treebank",",","binary","version","(","SST-2",")",".","See","https",":","\/\/www.tensorflow.org\/datasets\/catalog\/glue","#","gluesst2",".","This","data","is","reformatted","to","serve","the","language","models","."]
code: def spec(self):
      return {
          "text": lit_types.TextSegment(),
          "label": lit_types.CategoryLabel(vocab=self.LABELS),
      }
  
imports: from typing import Optional
  from lit_nlp.api import dataset
  from lit_nlp.api import types
  from lit_nlp.lib import file_cache
  from lit_nlp.lib import utils
  import pandas
  import tensorflow_datasets
label_desc: Use image node_id 2 for calling the SST2DataForLM obj's underlying member method code with example usage: obj.spec() and returns: dict