Cross-Sentence N-ary Relation Extraction with Graph LSTMs Nanyun Peng author Hoifung Poon author Chris Quirk author Kristina Toutanova author Wen-tau Yih author 2017 text journal article Transactions of the Association for Computational Linguistics continuing MIT Press Cambridge, MA periodical academic journal peng-etal-2017-cross 10.1162/tacl_a_00049 https://aclanthology.org/Q17-1008/ 2017 5 101 115