Question: The Ravello Festival is also popularly known as the "Wagner Festival" and is an annual summer festival of music and the arts, the composer had been so taken with the beauty of the Villa Rufolo in Ravello that he is said to have proclaimed, in reference to a character in his own opera Parsifal, an opera in how many acts by the German composer?
Sentence (from "Buxton Festival"): The Buxton Festival is an annual summer festival of opera, music, and (since 2000) a literary series, held in Buxton, Derbyshire, in England since its beginnings in July 1979.
Relevant evidence: No