NCRF++: An Open-source Neural Sequence Labeling Toolkit Jie Yang author Yue Zhang author 2018-07 text Proceedings of ACL 2018, System Demonstrations Fei Liu editor Thamar Solorio editor Association for Computational Linguistics Melbourne, Australia conference publication yang-zhang-2018-ncrf 10.18653/v1/P18-4013 https://aclanthology.org/P18-4013/ 2018-07 74 79