Context-free Approximation of LTAG towards CFG Filtering Kenta Oouchida author Naoki Yoshinaga author Jun’ichi Tsujii author 2004-05 text Proceedings of the 7th International Workshop on Tree Adjoining Grammar and Related Formalisms Owen Rambow editor Matthew Stone editor Simon Fraser University Vancouver, Canada conference publication oouchida-etal-2004-context https://aclanthology.org/W04-3323/ 2004-05 171 177