code: def _is_match(sentence, regex):
      return regex.search(sentence)
  
file_path: tensor2tensor/tensor2tensor/data_generators/cleaner_en_xx.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from __future__ import unicode_literals
  import itertools
  import re
  from tensor2tensor.data_generators import text_encoder
  import tensorflow.compat.v1
label_desc: Use image node_id 5 for calling a global function with example usage: _is_match(sentence, regex) and returns: regex