A Dual-Layer Semantic Role Labeling System Lun-Wei Ku author Shafqat Mumtaz Virk author Yann-Huei Lee author 2015-07 text Proceedings of ACL-IJCNLP 2015 System Demonstrations Hsin-Hsi Chen editor Katja Markert editor Association for Computational Linguistics and The Asian Federation of Natural Language Processing Beijing, China conference publication ku-etal-2015-dual 10.3115/v1/P15-4009 https://aclanthology.org/P15-4009/ 2015-07 49 54