@Book{BEA:2017,
  editor    = {Joel Tetreault  and  Jill Burstein  and  Claudia Leacock  and  Helen Yannakoudakis},
  title     = {Proceedings of the 12th Workshop on Innovative Use of NLP for Building Educational Applications},
  month     = {September},
  year      = {2017},
  address   = {Copenhagen, Denmark},
  publisher = {Association for Computational Linguistics},
  url       = {http://www.aclweb.org/anthology/W17-50}
}