Question: Which four act opera based on "El trovador" was written by the same composer as "Les vepres siciliennes?"
Sentence (from "Il trovatore"): It was Gutiérrez's most successful play, one which Verdi scholar Julian Budden describes as "a high flown, sprawling melodrama flamboyantly defiant of the Aristotelian unities, packed with all manner of fantastic and bizarre incident."
Relevant evidence: No