old_contents: from chainer.datasets import cifar
  from chainer.datasets import dict_dataset
  from chainer.datasets import image_dataset
  from chainer.datasets import mnist
  from chainer.datasets import ptb
  from chainer.datasets import sub_dataset
  from chainer.datasets import tuple_dataset
  
  
  DictDataset = dict_dataset.DictDataset
  ImageDataset = image_dataset.ImageDataset
  SubDataset = sub_dataset.SubDataset
  TupleDataset = tuple_dataset.TupleDataset
  
  get_cross_validation_datasets = sub_dataset.get_cross_validation_datasets
  get_cross_validation_datasets_random = (
      sub_dataset.get_cross_validation_datasets_random)
  
  split_dataset = sub_dataset.split_dataset
  split_dataset_random = sub_dataset.split_dataset_random
  
  
  # examples
  
  get_cifar10 = cifar.get_cifar10
  get_cifar100 = cifar.get_cifar100
  get_mnist = mnist.get_mnist
  get_ptb_words = ptb.get_ptb_words
  get_ptb_words_vocabulary = ptb.get_ptb_words_vocabulary
  
new_contents: from chainer.datasets import cifar
  from chainer.datasets import dict_dataset
  from chainer.datasets import image_dataset
  from chainer.datasets import mnist
  from chainer.datasets import ptb
  from chainer.datasets import sub_dataset
  from chainer.datasets import tuple_dataset
  
  
  DictDataset = dict_dataset.DictDataset
  ImageDataset = image_dataset.ImageDataset
  LabeledImageDataset = image_dataset.LabeledImageDataset
  SubDataset = sub_dataset.SubDataset
  TupleDataset = tuple_dataset.TupleDataset
  
  get_cross_validation_datasets = sub_dataset.get_cross_validation_datasets
  get_cross_validation_datasets_random = (
      sub_dataset.get_cross_validation_datasets_random)
  
  split_dataset = sub_dataset.split_dataset
  split_dataset_random = sub_dataset.split_dataset_random
  
  
  # examples
  
  get_cifar10 = cifar.get_cifar10
  get_cifar100 = cifar.get_cifar100
  get_mnist = mnist.get_mnist
  get_ptb_words = ptb.get_ptb_words
  get_ptb_words_vocabulary = ptb.get_ptb_words_vocabulary
  
subject: Add LabeledImageDataset to datasets module