Parsing Argumentation Structures in Persuasive Essays Christian Stab author Iryna Gurevych author 2017-09 text journal article Computational Linguistics continuing MIT Press Cambridge, MA periodical academic journal stab-gurevych-2017-parsing 10.1162/COLI_a_00295 https://aclanthology.org/J17-3005/ 2017-09 43 3 619 659