An Improved Extraction Pattern Representation Model for Automatic IE Pattern Acquisition Kiyoshi Sudo author Satoshi Sekine author Ralph Grishman author 2003-07 text Proceedings of the 41st Annual Meeting of the Association for Computational Linguistics Association for Computational Linguistics Sapporo, Japan conference publication sudo-etal-2003-improved 10.3115/1075096.1075125 https://aclanthology.org/P03-1029/ 2003-07 224 231