Convolution Kernels on Constituent, Dependency and Sequential Structures for Relation Extraction Truc-Vien T Nguyen author Alessandro Moschitti author Giuseppe Riccardi 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 nguyen-etal-2009-convolution https://aclanthology.org/D09-1143/ 2009-08 1378 1387