Enhancing PTB Universal Dependencies for Grammar-Based Surface Realization David L King author Michael White author 2016-sep 5-8 text Proceedings of the 9th International Natural Language Generation conference Amy Isard editor Verena Rieser editor Dimitra Gkatzia editor Association for Computational Linguistics Edinburgh, UK conference publication king-white-2016-enhancing 10.18653/v1/W16-6638 https://aclanthology.org/W16-6638/ 2016-sep 5-8 232 236