A Composite Kernel to Extract Relations between Entities with Both Flat and Structured Features Min Zhang author Jie Zhang author Jian Su author GuoDong Zhou author 2006-07 text Proceedings of the 21st International Conference on Computational Linguistics and 44th Annual Meeting of the Association for Computational Linguistics Nicoletta Calzolari editor Claire Cardie editor Pierre Isabelle editor Association for Computational Linguistics Sydney, Australia conference publication zhang-etal-2006-composite 10.3115/1220175.1220279 https://aclanthology.org/P06-1104/ 2006-07 825 832