LFG Generation by Grammar Specialization Jürgen Wedekind author Ronald M Kaplan author 2012-12 text journal article Computational Linguistics continuing MIT Press Cambridge, MA periodical academic journal wedekind-kaplan-2012-lfg 10.1162/COLI_a_00113 https://aclanthology.org/J12-4006/ 2012-12 38 4 867 915