Extração de Contextos Definitórios a partir de Textos em Língua Portuguesa (Extraction of Defining Contexts from Texts in Portuguese) [in Portuguese] Igor S Wendt author Renata Vieira author 2011 text Proceedings of the 8th Brazilian Symposium in Information and Human Language Technology conference publication wendt-vieira-2011-extracao https://aclanthology.org/W11-4513/ 2011