Densely Connected Graph Convolutional Networks for Graph-to-Sequence Learning Zhijiang Guo author Yan Zhang author Zhiyang Teng author Wei Lu author 2019 text journal article Transactions of the Association for Computational Linguistics continuing MIT Press Cambridge, MA periodical academic journal guo-etal-2019-densely 10.1162/tacl_a_00269 https://aclanthology.org/Q19-1019/ 2019 7 297 312