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The number of objects in a scene are used as label.
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root (str or ``pathlib.Path``): Root directory of dataset where directory ``root/clevr`` exists or will be saved to if download is
set to True.
split (string, optional): The dataset split, supports ``"train"`` (default), ``"val"``, or ``"test"``.
transform (callable, optional): A function/transform that takes in a PIL image and returns a transformed
version. E.g, ``transforms.RandomCrop``
target_transform (callable, optional): A function/transform that takes in them target and transforms it.
download (bool, optional): If true, downloads the dataset from the internet and puts it in root directory. If
dataset is already downloaded, it is not downloaded again.
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