Question: Which four act opera based on "El trovador" was written by the same composer as "Les vepres siciliennes?"
Sentence (from "Les vêpres siciliennes"): Les vêpres siciliennes ("The Sicilian Vespers") is a grand opéra in five acts by the Italian romantic composer Giuseppe Verdi set to a French libretto by Eugène Scribe and Charles Duveyrier from their work "Le duc d'Albe", which was written in 1838.
Relevant evidence: Yes