Detecting Speculations and their Scopes in Scientific Text Arzucan Özgür author Dragomir R Radev author 2009-08 text Proceedings of the 2009 Conference on Empirical Methods in Natural Language Processing Philipp Koehn editor Rada Mihalcea editor Association for Computational Linguistics Singapore conference publication ozgur-radev-2009-detecting https://aclanthology.org/D09-1145/ 2009-08 1398 1407