Criando um corpus sobre desastres climáticos com apoio da ferramenta NLTK (Creating a Corpus about Climate Disasters with the Support of the NLTK Tool) [in Portuguese] Rafael Antonangelo Molina author Margarethe Born Steinberger-Elias author 2011 text Proceedings of the 8th Brazilian Symposium in Information and Human Language Technology conference publication molina-steinberger-elias-2011-criando https://aclanthology.org/W11-4525/ 2011