@Book{LAW:2010,
  editor    = {Nianwen Xue  and  Massimo Poesio},
  title     = {Proceedings of the Fourth Linguistic Annotation Workshop},
  month     = {July},
  year      = {2010},
  address   = {Uppsala, Sweden},
  publisher = {Association for Computational Linguistics},
  url       = {http://www.aclweb.org/anthology/W10-18}
}