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 "Parsifal"): It is loosely based on "Parzival" by Wolfram von Eschenbach, a 13th-century epic poem of the Arthurian knight Parzival (Percival) and his quest for the Holy Grail (12th century).
Relevant evidence: No