code: def get_features():
      """Defines the context features and example features spec for parsing."""
  
      context_features = [
          struct2tensor_parsing_utils.Feature(QUERY_TOKENS, tf.string)
      ]
  
      example_features = [
          struct2tensor_parsing_utils.Feature(
              DOCUMENT_TOKENS, tf.string
          )
      ]
  
      label = struct2tensor_parsing_utils.Feature(LABEL, tf.int64)
  
      return context_features, example_features, label
  
label_desc: Use image node_id 1 for calling a global function with example usage: get_features() and returns: context_features,  example_features,  label