Efficient probabilistic top-down and left-corner parsing Brian Roark author Mark Johnson author 1999-06 text Proceedings of the 37th Annual Meeting of the Association for Computational Linguistics Association for Computational Linguistics College Park, Maryland, USA conference publication roark-johnson-1999-efficient 10.3115/1034678.1034743 https://aclanthology.org/P99-1054/ 1999-06 421 428