@InProceedings{yang-zhou-nyberg:2016:BioASQ,
  author    = {Yang, Zi  and  Zhou, Yue  and  Nyberg, Eric},
  title     = {Learning to Answer Biomedical Questions: OAQA at BioASQ 4B},
  booktitle = {Proceedings of the Fourth BioASQ workshop},
  month     = {August},
  year      = {2016},
  address   = {Berlin, Germany},
  publisher = {Association for Computational Linguistics},
  pages     = {23--37},
  url       = {http://anthology.aclweb.org/W16-3104}
}