Abductive Explanation-based Learning Improves Parsing Accuracy and Efficiency Oliver Streiter author 2003-07 text Proceedings of the Second SIGHAN Workshop on Chinese Language Processing Association for Computational Linguistics Sapporo, Japan conference publication streiter-2003-abductive 10.3115/1119250.1119265 https://aclanthology.org/W03-1715/ 2003-07 104 111