A Tale about PRO and Monsters Preslav Nakov author Francisco Guzmán author Stephan Vogel author 2013-08 text Proceedings of the 51st Annual Meeting of the Association for Computational Linguistics (Volume 2: Short Papers) Hinrich Schuetze editor Pascale Fung editor Massimo Poesio editor Association for Computational Linguistics Sofia, Bulgaria conference publication nakov-etal-2013-tale https://aclanthology.org/P13-2003/ 2013-08 12 17