Complex sentence: The National Arab Music Ensemble, conducted by Selim Sahab, won the gold medal, and as a conductor, he won the silver medal at the international Babel music festival of Babel in 1989.
Split into simpler sentences: The National Arab Music Ensemble, conducted by Selim Sahab, won the gold medal. As a conductor, he won the silver medal at the international Babel music festival of Babel in 1989.