Question: Valentino Urbani sang the role of Eustazio at the premiere of what opera that was composed in 171, and was the first Italian language opera written specifically for the London stage?
Sentence (from "Idomeneo"): The libretto was adapted by Giambattista Varesco from a French text by Antoine Danchet, which had been set to music by André Campra as "Idoménée" in 1712.
Relevant evidence: No