Given the task definition and input, reply with output. You are given a sentence in Polish. Your job is to translate the Polish sentence into Portugese.

Na pewno o nim słyszeliście. To nowa klasa środków owadobójczych.

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Já devem ter ouvido falar.