Squibs: Arc-Eager Parsing with the Tree Constraint Joakim Nivre author Daniel Fernández-González author 2014-06 text journal article Computational Linguistics continuing MIT Press Cambridge, MA periodical academic journal nivre-fernandez-gonzalez-2014-squibs 10.1162/COLI_a_00185 https://aclanthology.org/J14-2002/ 2014-06 40 2 259 267