@InProceedings{viethen-mitchell-krahmer:2013:ENLG,
  author    = {Viethen, Jette  and  Mitchell, Margaret  and  Krahmer, Emiel},
  title     = {Graphs and Spatial Relations in the Generation of Referring Expressions},
  booktitle = {Proceedings of the 14th European Workshop on Natural Language Generation},
  month     = {August},
  year      = {2013},
  address   = {Sofia, Bulgaria},
  publisher = {Association for Computational Linguistics},
  pages     = {72--81},
  url       = {http://www.aclweb.org/anthology/W13-2108}
}