@Book{VL:2015,
  editor    = {Anja Belz  and  Luisa Coheur  and  Vittorio Ferrari  and  Marie-Francine Moens  and  Katerina Pastra  and  Ivan Vulić},
  title     = {Proceedings of the Fourth Workshop on Vision and Language},
  month     = {September},
  year      = {2015},
  address   = {Lisbon, Portugal},
  publisher = {Association for Computational Linguistics},
  url       = {http://aclweb.org/anthology/W15-28}
}