Identifying the L1 of non-native writers: the CMU-Haifa system Yulia Tsvetkov author Naama Twitto author Nathan Schneider author Noam Ordan author Manaal Faruqui author Victor Chahuneau author Shuly Wintner author Chris Dyer author 2013-06 text Proceedings of the Eighth Workshop on Innovative Use of NLP for Building Educational Applications Joel Tetreault editor Jill Burstein editor Claudia Leacock editor Association for Computational Linguistics Atlanta, Georgia conference publication tsvetkov-etal-2013-identifying https://aclanthology.org/W13-1736/ 2013-06 279 287