Cirqueira , D., 		Vinícius , L., 		Pinheiro , M., 		Jacob Junior , A., 		Lobato , F., & 		Santana, Á.
(2017).
 Opinion Label: A Gamified Crowdsourcing System for Sentiment.
In <em>Companion Proceedings of the 23rd Brazilian Symposium on Multimedia and Web</em>, (pp. 209-213). Porto Alegre: SBC.