@InProceedings{lee-luo:2016:P16-4,
  author    = {Lee, John  and  Luo, Mengqi},
  title     = {Personalized Exercises for Preposition Learning},
  booktitle = {Proceedings of ACL-2016 System Demonstrations},
  month     = {August},
  year      = {2016},
  address   = {Berlin, Germany},
  publisher = {Association for Computational Linguistics},
  pages     = {115--120},
  url       = {http://anthology.aclweb.org/P16-4020}
}