Which contained more acts, Macbeth or Les mamelles de Tirésias?
Macbeth
Title: Les Mamelles
Passage: Les Mamelles is an administrative district of the Seychelles, located in the south of the Greater Victoria (suburban) area on Mahé, the main island of the archipelago.  The district is located inward from the adjacent coastal district of Roche Caiman.  It is not to be confused with Mamelles Island some six kilometers northeast of Mahé.
Title: Macbeth (opera)
Passage: Macbeth (] ) is an opera in four acts by Giuseppe Verdi, with an Italian libretto by Francesco Maria Piave and additions by Andrea Maffei, based on William Shakespeare's play of the same name.
Title: Les mamelles de Tirésias
Passage: Les mamelles de Tirésias ("The Breasts of Tiresias") is an "opéra bouffe" by Francis Poulenc, in a prologue and two acts based on the play of the same title by Guillaume Apollinaire.  The opera was written in 1945 and first performed in 1947.
Macbeth (opera) Les mamelles de Tirésias