Tree Kernel-based Negation and Speculation Scope Detection with Structured Syntactic Parse Features Bowei Zou author Guodong Zhou author Qiaoming Zhu author 2013-10 text Proceedings of the 2013 Conference on Empirical Methods in Natural Language Processing David Yarowsky editor Timothy Baldwin editor Anna Korhonen editor Karen Livescu editor Steven Bethard editor Association for Computational Linguistics Seattle, Washington, USA conference publication zou-etal-2013-tree https://aclanthology.org/D13-1099/ 2013-10 968 976