Higher-order Lexical Semantic Models for Non-factoid Answer Reranking Daniel Fried author Peter Jansen author Gustave Hahn-Powell author Mihai Surdeanu author Peter Clark author 2015 text journal article Transactions of the Association for Computational Linguistics continuing MIT Press Cambridge, MA periodical academic journal fried-etal-2015-higher 10.1162/tacl_a_00133 https://aclanthology.org/Q15-1015/ 2015 3 197 210