Georgios Petasis, The Ellogon Pattern Engine: Context-free Grammars over Annotations, In Proceedings of the Ninth International Conference on Language Resources and Evaluation (LREC-2014), Reykjavik, Iceland, May 26-31, 2014 (Nicoletta Calzolari, Khalid Choukri, Thierry Declerck, Hrafn Loftsson, Bente Maegaard, Joseph Mariani, Asunci'on Moreno, Jan Odijk, Stelios Piperidis, eds.), European Language Resources Association (ELRA), (Pages: 2460-2465), 2014.