code: def punctuation(cls):
      def context_punctuation(x):
          return (utils.strip_punctuation(x[0]), x[1])
  
      return context_punctuation
  
imports: from typing import Optional, Iterable, Tuple, Union
  import itertools
  import numpy
  from checklist.editor import MunchWithAdd
  from checklist.test_suite import TestSuite
  from checklist.test_types import MFT
  from checklist.perturb import Perturb
  from allennlp.confidence_checks.task_checklists.task_suite import TaskSuite
  from allennlp.confidence_checks.task_checklists import utils
  from allennlp.predictors import Predictor
label_desc: Use image node_id 6 for calling the QuestionAnsweringSuite obj's underlying member method code with example usage: obj.punctuation(cls) and returns: context_punctuation, utils,  x