class_docstr: Problem spec for CoNLL2002 Dutch named entity task.
class_docstr_tok: ["Problem","spec","for","CoNLL2002","Dutch","named","entity","task","."]
code: def source_data_files(self, dataset_split):
      is_training = dataset_split == problem.DatasetSplit.TRAIN
      return self.TRAIN_FILES if is_training else self.EVAL_FILES
  
file_path: tensor2tensor/tensor2tensor/data_generators/conll_ner.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  import zipfile
  from tensor2tensor.data_generators import generator_utils
  from tensor2tensor.data_generators import problem
  from tensor2tensor.data_generators import text_problems
  from tensor2tensor.utils import registry
  import tensorflow.compat.v1
label_desc: Use image node_id 1 for calling the Conll2002NlNer obj's underlying member method code with example usage: obj.source_data_files(dataset_split) and returns: unknown