code: def rouge_l(hypotheses, references):
      
      rouge_l = [
          rouge_l_sentence_level([hyp], [ref])
          for hyp, ref in zip(hypotheses, references)
      ]
      rouge_l_f, _, _ = map(np.mean, zip(*rouge_l))
      return rouge_l_f
docs: Calculate ROUGE-L F1, precision, recall scores