code: def rouge_1(hypotheses, references):
      
      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
docs: Calculate ROUGE-1 F1, precision, recall scores