code: def normalize_squad(answer):
      """Normalization used in official SQuAD evaluation script."""
      return _normalize_answer(
          answer, punc_chars=string.punctuation, punc_repl=""
      )
  
file_path: text-to-text-transfer-transformer/t5/evaluation/qa_utils.py
imports: import collections
  import re
  import string
  from absl import logging
  import numpy
label_desc: Use image node_id 3 for calling a global function with example usage: normalize_squad(answer) and returns: _normalize_answer