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 "Ravello Festival"): The festival has been held yearly since 1953 when the town fathers decided to use the historical fact of the visit to Ravello in 1880 by German composer Richard Wagner as a way to promote tourism and bolster the economy of the area in the difficult years following the Second World War.
Relevant evidence: No