Noun2Verb: Probabilistic Frame Semantics for Word Class Conversion Lei Yu author Yang Xu author 2022-12 text journal article Computational Linguistics continuing MIT Press Cambridge, MA periodical academic journal yu-xu-2022-noun2verb 10.1162/coli_a_00447 https://aclanthology.org/2022.cl-4.11/ 2022-12 48 4 783 818