Personalized Exercises for Preposition Learning John Lee author Mengqi Luo author 2016-08 text Proceedings of ACL-2016 System Demonstrations Sameer Pradhan editor Marianna Apidianaki editor Association for Computational Linguistics Berlin, Germany conference publication lee-luo-2016-personalized 10.18653/v1/P16-4020 https://aclanthology.org/P16-4020/ 2016-08 115 120