Complex sentence: He broke into the senior team at in 1987--88, making six starts, subsequently being sent on loan to Vitória de Setúbal for the next season, where he scored 10 times.
Split into simpler sentences: He broke into the senior team at in 1987-88, making six starts. He was sent on loan to Vitória de Setúbal during the next season, where he scored 10 times.