Multi-hop Reading Comprehension across Multiple Documents by Reasoning over Heterogeneous Graphs Ming Tu author Guangtao Wang author Jing Huang author Yun Tang author Xiaodong He author Bowen Zhou 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 tu-etal-2019-multi 10.18653/v1/P19-1260 https://aclanthology.org/P19-1260/ 2019-07 2704 2713