@Book{*SEM:2013,
  editor    = {Mona Diab  and  Tim Baldwin  and  Marco Baroni},
  title     = {Second Joint Conference on Lexical and Computational Semantics (*SEM), Volume 1: Proceedings of the Main Conference and the Shared Task: Semantic Textual Similarity},
  month     = {June},
  year      = {2013},
  address   = {Atlanta, Georgia, USA},
  publisher = {Association for Computational Linguistics},
  url       = {http://www.aclweb.org/anthology/S13-1}
}