Question: Clinton Marius, is a South African writer and performer, he made his first professional appearance singing the lead role in which opera in one act by Gian Carlo Menotti with an original English libretto by the composer?
Sentence (from "A Hand of Bridge"): A Hand of Bridge, opus 35, is an opera in one act composed by Samuel Barber with libretto by Gian Carlo Menotti, and is possibly the shortest opera that is regularly performed: it lasts about nine minutes.
Relevant evidence: No