def METHOD_NAME(self, dataset_name: str):
    if dataset_name == "xsum":
        url = "https://worksheets.codalab.org/rest/bundles/0xac5607f21bf945939edc56ea945496d5/contents/blob/"
        dataset = self._download_dataset(url, "xsum")
        article_key = "document"
        summary_key = "summary"
    elif dataset_name == "xsum-sampled":
        url = "https://worksheets.codalab.org/rest/bundles/0xcfbb0ef1226040f78e58060c9e4d13cf/contents/blob/"
        dataset = self._download_dataset(url, "xsum-sampled")
        article_key = "document"
        summary_key = "summary"
    elif dataset_name == "cnn-dm":
        url = "https://worksheets.codalab.org/rest/bundles/0x07630390bbda44879a2ad36e2125d64c/contents/blob/"
        dataset = self._download_dataset(url, "cnndm")
        article_key = "article"
        summary_key = "highlights"
    else:
        raise ValueError("The specified dataset is not supported")
    return dataset, article_key, summary_key