An Explicit Feedback System for Preposition Errors based on Wikipedia Revisions Nitin Madnani author Aoife Cahill author 2014-06 text Proceedings of the Ninth Workshop on Innovative Use of NLP for Building Educational Applications Joel Tetreault editor Jill Burstein editor Claudia Leacock editor Association for Computational Linguistics Baltimore, Maryland conference publication madnani-cahill-2014-explicit 10.3115/v1/W14-1810 https://aclanthology.org/W14-1810/ 2014-06 79 88