@Book{Proc-IWCS2013:WAMM:2013,
  editor    = {Portner, Paul  and  Rubinstein, Aynat  and  Katz, Graham},
  title     = {Proceedings of the IWCS 2013 Workshop on Annotation of Modal Meanings in Natural Language (WAMM)},
  month     = {March},
  year      = {2013},
  address   = {Potsdam, Germany},
  publisher = {Association for Computational Linguistics},
  url       = {http://www.aclweb.org/anthology/W13-0300}
}