code: def _is_divider(line: str) -> bool:
      empty_line = line.strip() == ""
      if empty_line:
          return True
      else:
          first_token = line.split()[0]
          if first_token == "-DOCSTART-":
              return True
          else:
              return False
  
file_path: allennlp/allennlp/data/dataset_readers/conll2003.py
imports: from typing import Dict, List, Optional, Sequence, Iterable
  import itertools
  import logging
  import warnings
  from allennlp.common.checks import ConfigurationError
  from allennlp.common.file_utils import cached_path
  from allennlp.data.dataset_readers.dataset_reader import DatasetReader, PathOrStr
  from allennlp.data.dataset_readers.dataset_utils import to_bioul
  from allennlp.data.fields import TextField, SequenceLabelField, Field, MetadataField
  from allennlp.data.instance import Instance
  from allennlp.data.token_indexers import TokenIndexer, SingleIdTokenIndexer
  from allennlp.data.tokenizers import Token
label_desc: Use image node_id 1 for calling a global function with example usage: _is_divider(line) and returns: True, True, False