The composer of the ballet L'Île Enchantée has composed how many major orchestral works?
L'Île Enchantée: L'Île Enchantée (literally, The Enchanted Island) is an 1864 ballet by Arthur Sullivan written as a divertissement at the end of Vincenzo Bellini's "La Sonnambula" at Covent Garden. Arthur Sullivan:  His works include 23 operas, 13 major orchestral works, eight choral works and oratorios, two ballets, incidental music to several plays, and numerous hymns and other church pieces, songs, and piano and chamber pieces.
13