code: def __getitem__(self, idx):
      sample = super(VQA2OCRDataset, self).__getitem__(idx)
  
      if sample["question_id"] is None:
          sample["question_id"] = -1
      return sample
  
imports: from mmf.datasets.builders.vizwiz import VizWizDataset
  from mmf.utils.text import word_tokenize
label_desc: Use image node_id 3 for calling the VQA2OCRDataset obj's underlying member method code with example usage: obj.__getitem__(idx) and returns: sample