Question: Are both Roberto Devereux and King Priam operas?
Sentence (from "Roberto Devereux"): Salvadore Cammarano wrote the Italian libretto after François Ancelot's tragedy "Elisabeth d'Angleterre" (1829), and based as well on the "Historie secrete des amours d'Elisabeth et du comte d'Essex" (1787) by "Jacques Lescéne des Maisons", although Devereux was the subject of at least two other French plays: "Le Comte d'Essex" by Thomas Corneille and "Le Comte d'Essex" by Gauthier de Costes, seigneur de la Calprenède.
Relevant evidence: No