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 System for the Collection and Treatment of Brazilian Texts on Political Polarization. In <em>Companion Proceedings of the 17th Brazilian Symposium on Information Systems</em>, June 07, 2021, On-line, Brasil. SBC, Porto Alegre, Brasil, 01-04. DOI: <a href="https://doi.org/10.5753/sbsi.2021.15342">https://doi.org/10.5753/sbsi.2021.15342</a>.