Unsupervised Sentence Simplification Using Deep Semantics Shashi Narayan author Claire Gardent 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 narayan-gardent-2016-unsupervised 10.18653/v1/W16-6620 https://aclanthology.org/W16-6620/ 2016-sep 5-8 111 120