code: def doc_to_target(self, doc):
      answer = doc["answer"]
      if isinstance(answer, list):
          answer = ", ".join(answer)
      return " " + answer
  
imports: from collections import Counter
  import re
  import string
  from lm_eval.base import rf, Task
  from lm_eval.metrics import f1_score, mean
label_desc: Use image node_id 5 for calling the QASPER obj's underlying member method code with example usage: obj.doc_to_target(doc) and returns: unknown