TextGraphs 2021 Shared Task on Multi-Hop Inference for Explanation Regeneration Mokanarangan Thayaparan author Marco Valentino author Peter Jansen author Dmitry Ustalov author 2021-06 text Proceedings of the Fifteenth Workshop on Graph-Based Methods for Natural Language Processing (TextGraphs-15) Alexander Panchenko editor Fragkiskos D Malliaros editor Varvara Logacheva editor Abhik Jana editor Dmitry Ustalov editor Peter Jansen editor Association for Computational Linguistics Mexico City, Mexico conference publication thayaparan-etal-2021-textgraphs 10.18653/v1/2021.textgraphs-1.17 https://aclanthology.org/2021.textgraphs-1.17/ 2021-06 156 165