Penman: An Open-Source Library and Tool for AMR Graphs Michael Wayne Goodman author 2020-07 text Proceedings of the 58th Annual Meeting of the Association for Computational Linguistics: System Demonstrations Asli Celikyilmaz editor Tsung-Hsien Wen editor Association for Computational Linguistics Online conference publication goodman-2020-penman 10.18653/v1/2020.acl-demos.35 https://aclanthology.org/2020.acl-demos.35/ 2020-07 312 319