code: def __getitem__(self, index):
      ann = copy.deepcopy(self.annotation[index])
      audio_path = os.path.join(self.audio_root, ann["file_name"])
      ann["audio"] = self.audio_processor(audio_path)
  
      if ann["audio"].sum() == 0:
          return None
  
      return {
          "text_input": self.text_processor(ann["question"]),
          "question": self.text_processor(ann["question"]),
          "instance_id": ann["instance_id"],
          "text_output": random.choice(ann["answer"]),
          "answer": ann["answer"],
          "answers": ann["answer"],
          "audio": ann["audio"],
          "question_id": ann["instance_id"],
      }
  
file_path: lavis/lavis/datasets/datasets/audio_qa_datasets.py
imports: import copy
  import os
  from lavis.datasets.datasets.audio_captioning_datasets import AudioCapsDataset
  from lavis.datasets.datasets.base_dataset import BaseDataset
  import torch
  import random
  from collections import Counter
label_desc: Use image node_id 2 for calling the ClothoQADataset obj's underlying member method code with example usage: obj.__getitem__(index) and returns: dict, None