Eduardo Paiva and Fernando Pereira. 2021. Extraction and enrichment of features to improve complaint text classification performance. In Anais do XVIII Encontro Nacional de InteligĂȘncia Artificial e Computacional, novembro 29, 2021, Evento Online, Brasil. SBC, Porto Alegre, Brasil, 338-349. DOI: https://doi.org/10.5753/eniac.2021.18265.