n-gram F-score for Evaluating Grammatical Error Correction Shota Koyama author Ryo Nagata author Hiroya Takamura author Naoaki Okazaki author 2024-09 text Proceedings of the 17th International Natural Language Generation Conference Saad Mahamood editor Nguyen Le Minh editor Daphne Ippolito editor Association for Computational Linguistics Tokyo, Japan conference publication koyama-etal-2024-n-gram 10.18653/v1/2024.inlg-main.25 https://aclanthology.org/2024.inlg-main.25/ 2024-09 303 313