code: def tokenize(self, tokenizer):
      raise NotImplementedError("SQuaD is weird")
  
imports: import logging
  import numpy
  from dataclasses import dataclass
  from typing import Optional
  from jiant.shared.constants import PHASE
  from jiant.tasks.lib.templates.squad_style import core
  from jiant.utils.python.io import read_json
  from jiant.utils.display import maybe_tqdm
  from jiant.utils.python.datastructures import take_one
label_desc: Use image node_id 1 for calling the Example obj's underlying member method code with example usage: obj.tokenize(tokenizer) without return types