code: def rouge_score(prediction, reference, **kwargs):
      rouge = Rouge()
      try:
          scores = rouge.get_scores([prediction], [reference], avg=True)
      except:
          return 0.0
      return scores["rouge-l"]["f"]
  
imports: import difflib
  import re
  import string
  from collections import Counter
  import jieba
  from fuzzywuzzy import fuzz
  from rouge import Rouge
label_desc: Use image node_id 19 for calling a global function with example usage: rouge_score(prediction, reference) and returns: scores, int