code: def download_mwoz_21(destination):
      """Download the dataset repo, unpack it, and remove unnecessary elements.
      Arguments
      ---------
      destination: str
          Place to put dataset.
      """
      mwoz_21_archive = os.path.join(destination, "MultiWOZ_21.zip")
      download_file(MULTIWOZ_21_DATASET_URL, mwoz_21_archive)
      shutil.unpack_archive(mwoz_21_archive, destination)
      shutil.rmtree(os.path.join(destination, "__MACOSX"))
  
      mwoz_21 = os.path.join(destination, "MultiWOZ_21")
      os.makedirs(mwoz_21, exist_ok=True)
  
      mwoz_21_repo = os.path.join(destination, "MultiWOZ_2.1")
      for relevant_file in [
          "data.json",
          "valListFile.txt",
          "testListFile.txt",
      ]:
          shutil.move(
              os.path.join(mwoz_21_repo, relevant_file),
              os.path.join(mwoz_21, relevant_file),
          )
  
      shutil.rmtree(mwoz_21_repo)
  
imports: from itertools import product
  from statistics import mean
  from typing import Any, Dict, List, Optional, Set, Tuple
  import json
  import logging
  import os
  import re
  import shutil
  from tqdm import tqdm
  from speechbrain.utils.data_utils import download_file
label_desc: Use image node_id 3 for calling a global function with example usage: download_mwoz_21(destination) without return types