@InProceedings{riedel-EtAl:2011:BioNLP-ST,
  author    = {Riedel, Sebastian  and  McClosky, David  and  Surdeanu, Mihai  and  McCallum, Andrew  and  D. Manning, Christopher},
  title     = {Model Combination for Event Extraction in BioNLP 2011},
  booktitle = {Proceedings of BioNLP Shared Task 2011 Workshop},
  month     = {June},
  year      = {2011},
  address   = {Portland, Oregon, USA},
  publisher = {Association for Computational Linguistics},
  pages     = {51--55},
  url       = {http://www.aclweb.org/anthology/W11-1808}
}