Do both Simon Boccanegra and Le roi d'Ys have the same number of acts?
Le roi d'Ys Le roi d'Ys ("The King of Ys") is an opera in three acts and five tableaux by the French composer Édouard Lalo, to a libretto by Édouard Blau, based on the old Breton legend of the drowned city of Ys. That city was, according to the legend, the capital of the kingdom of Cornouaille.
Las Hermanas (ballet) Las Hermanas is a one-act ballet created by Kenneth MacMillan in 1971 for the Royal Ballet. The music is Frank Martin's Harpsichord Concerto (1952). The piece is loosely based on "The House of Bernarda Alba" by Federico García Lorca.