The Return of Lexical Dependencies: Neural Lexicalized PCFGs Hao Zhu author Yonatan Bisk author Graham Neubig author 2020 text journal article Transactions of the Association for Computational Linguistics continuing MIT Press Cambridge, MA periodical academic journal zhu-etal-2020-return 10.1162/tacl_a_00337 https://aclanthology.org/2020.tacl-1.42/ 2020 8 647 661