Realistic Grammar Error Simulation using Markov Logic Sungjin Lee author Gary Geunbae Lee author 2009-08 text Proceedings of the ACL-IJCNLP 2009 Conference Short Papers Keh-Yih Su editor Jian Su editor Janyce Wiebe editor Haizhou Li editor Association for Computational Linguistics Suntec, Singapore conference publication lee-lee-2009-realistic https://aclanthology.org/P09-2021/ 2009-08 81 84