Proceedings of the Tweet Normalization Workshop co-located with 29th Conference of the Spanish Society for Natural Language Processing (SEPLN 2013), Madrid, Spain, September 20th, 2013 - ñaki Alegria; Nora Aranberri; FRESNO FERNANDEZ, VICTOR DIEGO; Pablo Gamallo; Lluís Padró; Iñaki San Vicente; Jordi Turmo; Arkaitz Zubiaga (2013)