Question: How many acts are in both Iphigénie en Aulide and  La fanciulla del West?
Sentence (from "Iphigénie en Aulide"): Iphigénie en Aulide ("Iphigeneia in Aulis") is an opera in three acts by Christoph Willibald Gluck, the first work he wrote for the Paris stage.
Relevant evidence: Yes