Evaluating Methods for Extraction of Aspect Terms in Opinion Texts in Portuguese - the Challenges of Implicit Aspects Mateus Machado author Thiago Alexandre Salgueiro Pardo author 2022-06 text Proceedings of the Thirteenth Language Resources and Evaluation Conference Nicoletta Calzolari editor Frédéric Béchet editor Philippe Blache editor Khalid Choukri editor Christopher Cieri editor Thierry Declerck editor Sara Goggi editor Hitoshi Isahara editor Bente Maegaard editor Joseph Mariani editor Hélène Mazo editor Jan Odijk editor Stelios Piperidis editor European Language Resources Association Marseille, France conference publication machado-pardo-2022-evaluating https://aclanthology.org/2022.lrec-1.407/ 2022-06 3819 3828