@InProceedings{xu-EtAl:2013:NAACL-HLT2,
  author    = {Xu, Ying  and  Kim, Mi-Young  and  Quinn, Kevin  and  Goebel, Randy  and  Barbosa, Denilson},
  title     = {Open Information Extraction with Tree Kernels},
  booktitle = {Proceedings of the 2013 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies},
  month     = {June},
  year      = {2013},
  address   = {Atlanta, Georgia},
  publisher = {Association for Computational Linguistics},
  pages     = {868--877},
  url       = {http://www.aclweb.org/anthology/N13-1107}
}