code: def __getitem__(self, item):
      audio, sample_rate, text, _, _, _ = self.dataset[item]
      assert sample_rate == 16000
      return pad_or_trim_tensor(audio[0]), text
  
imports: import unittest
  import torch
  import tqdm
  import torchaudio
  import pathlib
  import jiwer
  import os
  import numpy
  from whisper.normalizers import EnglishTextNormalizer
  from examples.whisper import init_whisper, transcribe_waveform
label_desc: Use image node_id 3 for calling the LibriSpeech obj's underlying member method code with example usage: obj.__getitem__(item) and returns: pad_or_trim_tensor,  text