Question: What is the acronym of the country's navy that was responsible for discovering Cape Sobral?
Sentence (from "Salvador Sobral"): Salvador Vilar Braamcamp Sobral (] , born 28 December 1989) is a Portuguese singer, who won the Eurovision Song Contest 2017 in Kiev, Ukraine for Portugal with the song "Amar pelos dois", written and composed by his sister Luísa Sobral.
Relevant evidence: No