code: def rouge_1(hypotheses, references):
      """
      Calculate ROUGE-1 F1, precision, recall scores
      """
      rouge_1 = [
          rouge_n([hyp], [ref], 1)
          for hyp, ref in zip(hypotheses, references)
      ]
      rouge_1_f, _, _ = map(np.mean, zip(*rouge_1))
      return rouge_1_f
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from __future__ import unicode_literals
  import itertools
  import numpy
label_desc: Use image node_id 13 for calling a global function with example usage: rouge_1(hypotheses, references) and returns: rouge_1_f