def METHOD_NAME(ref_file, summarization_file, subword_option=None):
  """Compute ROUGE scores and handling BPE."""
  references = []
  with codecs.getreader("utf-8")(tf.gfile.GFile(ref_file, "rb")) as fh:
    for line in fh:
      references.append(_clean(line, subword_option))
  hypotheses = []
  with codecs.getreader("utf-8")(
      tf.gfile.GFile(summarization_file, "rb")) as fh:
    for line in fh:
      hypotheses.append(_clean(line, subword_option=None))
  rouge_score_map = rouge.rouge(hypotheses, references)
  return 100 * rouge_score_map["rouge_l/f_score"]