@InProceedings{liu-EtAl:2014:Coling2,
  author    = {Liu, Yang  and  Liu, Kang  and  Xu, Liheng  and  Zhao, Jun},
  title     = {Exploring Fine-grained Entity Type Constraints for Distantly Supervised Relation Extraction},
  booktitle = {Proceedings of COLING 2014, the 25th International Conference on Computational Linguistics: Technical Papers},
  month     = {August},
  year      = {2014},
  address   = {Dublin, Ireland},
  publisher = {Dublin City University and Association for Computational Linguistics},
  pages     = {2107--2116},
  url       = {http://www.aclweb.org/anthology/C14-1199}
}