Squibs: Restricted Non-Projectivity: Coverage vs. Efficiency Carlos Gómez-Rodríguez author 2016-12 text journal article Computational Linguistics continuing MIT Press Cambridge, MA periodical academic journal gomez-rodriguez-2016-squibs 10.1162/COLI_a_00267 https://aclanthology.org/J16-4008/ 2016-12 42 4 809 817