L1-L2 Parallel Dependency Treebank as Learner Corpus John Lee author Keying Li author Herman Leung author 2017-09 text Proceedings of the 15th International Conference on Parsing Technologies Yusuke Miyao editor Kenji Sagae editor Association for Computational Linguistics Pisa, Italy conference publication lee-etal-2017-l1 https://aclanthology.org/W17-6306/ 2017-09 44 49