@InProceedings{ostermann-horbach-pinkal:2015:NLP-TEA,
  author    = {Ostermann, Simon  and  Horbach, Andrea  and  Pinkal, Manfred},
  title     = {Annotating Entailment Relations for Shortanswer Questions},
  booktitle = {Proceedings of the 2nd Workshop on Natural Language Processing Techniques for Educational Applications},
  month     = {July},
  year      = {2015},
  address   = {Beijing, China},
  publisher = {Association for Computational Linguistics},
  pages     = {49--58},
  url       = {http://www.aclweb.org/anthology/W15-4408}
}