One Tokenization per Source Jin Guo author 1998-08 text 36th Annual Meeting of the Association for Computational Linguistics and 17th International Conference on Computational Linguistics, Volume 1 Association for Computational Linguistics Montreal, Quebec, Canada conference publication guo-1998-one-tokenization 10.3115/980845.980923 https://aclanthology.org/P98-1076/ 1998-08 457 463