class_docstr: CLEAR Base Dataset for downloading / loading metadata
code: def __getitem__(self, index):
      img_path, target = self.samples[index]
      return str(self.root / img_path), target
  
imports: from pathlib import Path
  from typing import Optional, Sequence, Tuple, Union, List
  import json
  import os
  import torch
  from torchvision.datasets.folder import default_loader
  from avalanche.benchmarks.datasets import DownloadableDataset, default_dataset_location
  from avalanche.benchmarks.utils import default_flist_reader
  from avalanche.benchmarks.datasets.clear import clear_data
label_desc: Use image node_id 7 for calling the CLEARDataset obj's underlying member method code with example usage: obj.__getitem__(index) and returns: str,  target