Question: What do Un re in ascolto and Il trovatore have in common?
Sentence (from "Il trovatore"): Il trovatore (] ; Italian for "The Troubadour") is an opera in four acts by Giuseppe Verdi to an Italian libretto largely written by Salvadore Cammarano, based on the play "El trovador" (1836) by Antonio García Gutiérrez.
Relevant evidence: Yes