task_categories:text-generation task_categories:text-retrieval language:en language:zh license:apache-2.0 size_categories:100K<n<1M format:csv modality:text library:datasets library:dask library:mlcroissant library:polars arxiv:2509.20904 region:us sequential-recommendation raw-data anonymized e-commerce next-item-prediction generative-retrieval semantic-identifiers