@Book{Prep07:2007,
  editor    = {Fintan Costello  and  John Kelleher  and  Martin Volk},
  title     = {Proceedings of the Fourth ACL-SIGSEM Workshop on Prepositions},
  month     = {June},
  year      = {2007},
  address   = {Prague, Czech Republic},
  publisher = {Association for Computational Linguistics},
  url       = {http://www.aclweb.org/anthology/W/W07/W07-16}
}