@InProceedings{chen-EtAl:2012:BEA,
  author    = {Chen, Mei-Hua  and  Huang, Shi-Ting  and  Huang, Chung-Chi  and  Liou, Hsien-Chin  and  Chang, Jason S.},
  title     = {PREFER: Using a Graph-Based Approach to Generate Paraphrases for Language Learning},
  booktitle = {Proceedings of the Seventh Workshop on Building Educational Applications Using NLP},
  month     = {June},
  year      = {2012},
  address   = {Montr\'{e}al, Canada},
  publisher = {Association for Computational Linguistics},
  pages     = {80--85},
  url       = {http://www.aclweb.org/anthology/W12-2009}
}