He also wrote the incidental music to Babar the Elephant.  
His burlesque opera based on a 1903 play by Guillaume Apollinaire, entitled Les Mamelles de Tiresias, tells of a woman who becomes a man when her breasts explode, and her husband becomes a woman and gives birth to 40,000 babies.  He also wrote the incidental music to Babar the Elephant.  His most famous opera is set against the backdrop of the French Revolution, and is considered on of the outstanding operas of the 20th century.  For 10 points, who was this member of Les Six and composer of Les Dialogues des Carmelites?
His burlesque opera based on a 1903 play by Guillaume Apollinaire, entitled Les Mamelles de Tiresias, tells of a woman who becomes a man when her breasts explode, and her husband becomes a woman and gives birth to 40,000 babies.  
Francois Poulenc