@InProceedings{nguyen-moschitti-riccardi:2009:EMNLP,
  author    = {Nguyen, Truc-Vien T.  and  Moschitti, Alessandro  and  Riccardi, Giuseppe},
  title     = {Convolution Kernels on Constituent, Dependency and Sequential Structures for Relation Extraction},
  booktitle = {Proceedings of the 2009 Conference on Empirical Methods in Natural Language Processing},
  month     = {August},
  year      = {2009},
  address   = {Singapore},
  publisher = {Association for Computational Linguistics},
  pages     = {1378--1387},
  url       = {http://www.aclweb.org/anthology/D/D09/D09-1143}
}