@InProceedings{fokkens-EtAl:2013:EVENTS,
  author    = {Fokkens, Antske  and  van Erp, Marieke  and  Vossen, Piek  and  Tonelli, Sara  and  van Hage, Willem Robert  and  Serafini, Luciano  and  Sprugnoli, Rachele  and  Hoeksema, Jesper},
  title     = {GAF: A Grounded Annotation Framework for Events},
  booktitle = {Workshop on Events: Definition, Detection, Coreference, and Representation},
  month     = {June},
  year      = {2013},
  address   = {Atlanta, Georgia},
  publisher = {Association for Computational Linguistics},
  pages     = {11--20},
  url       = {http://www.aclweb.org/anthology/W13-1202}
}