def METHOD_NAME(self) -> Dataset:
    dataset_file = os.path.join(self.data_dir, 'Platinum_adsorption.json')
    if not os.path.exists(dataset_file):
        dc.utils.data_utils.download_url(url=PLATINUM_URL,
                                         dest_dir=self.data_dir)
        dc.utils.data_utils.untargz_file(
            os.path.join(self.data_dir, 'Platinum_adsorption.tar.gz'),
            self.data_dir)
    loader = dc.data.JsonLoader(tasks=PLATINUM_TASKS,
                                feature_field="Structures",
                                label_field="Formation Energy",
                                featurizer=self.featurizer,
                                **self.args)
    return loader.METHOD_NAME(dataset_file)