Transforming Complex Sentences into a Semantic Hierarchy Christina Niklaus author Matthias Cetto author André Freitas author Siegfried Handschuh author 2019-07 text Proceedings of the 57th Annual Meeting of the Association for Computational Linguistics Anna Korhonen editor David Traum editor Lluís Màrquez editor Association for Computational Linguistics Florence, Italy conference publication niklaus-etal-2019-transforming 10.18653/v1/P19-1333 https://aclanthology.org/P19-1333/ 2019-07 3415 3427