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?

Context paragraphs:
Parsifal: Parsifal (WWV 111) is an opera in three acts by German composer Richard Wagner.  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).

Iford Arts Festival: Iford Arts Festival is an annual summer festival of opera and jazz, which takes place at Iford Manor near Bradford on Avon in Wiltshire, England.  Operas are produced by Iford Festival Opera.  It also features the Iford Jazz Proms, as well as other concerts and performances.

Bayreuth Festival: The Bayreuth Festival (German: Bayreuther Festspiele ) is a music festival held annually in Bayreuth, Germany, at which performances of operas by the 19th-century German composer Richard Wagner are presented.  Wagner himself conceived and promoted the idea of a special festival to showcase his own works, in particular his monumental cycle "Der Ring des Nibelungen " and "Parsifal".

Ravello Festival: The Ravello Festival is also popularly known as the "Wagner Festival" and is an annual summer festival of music and the arts held in the town of Ravello on the Amalfi coast in the Campania region of Italy.  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.  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, "Here is the enchanted garden of Klingsor."

Tampere Floral Festival: The Tampere Floral Festival is an annual summer festival held in Tampere, Southern Finland in July and/or August.  During the festival the centre of the city is decorated by flower arrangements and about 150 events such as concerts, parades, a "wine village" and a children's day take place.  The festival lasts approximately one week and attracts thousands of local residents and visitors.

Cosima Wagner: Cosima Wagner (born Francesca Gaetana Cosima Liszt; 24 December 1837 – 1 April 1930) was the illegitimate daughter of the Hungarian pianist and composer Franz Liszt and Marie d'Agoult.  She became the second wife of the German composer Richard Wagner, and with him founded the Bayreuth Festival as a showcase for his stage works; after his death she devoted the rest of her life to the promotion of his music and philosophy.  Commentators have recognised Cosima as the principal inspiration for Wagner's later works, particularly "Parsifal".

Opera Saratoga: Opera Saratoga(until January 2011, named the Lake George Opera) is a professional opera company based in Saratoga Springs, New York.  It performs an annual summer festival of three fully staged operas and operettas.

LOOK Musical Theatre: LOOK Musical Theatre (LOOK) was a professional musical theatre company based in Tulsa, Oklahoma.  The organization, governed by an elected board of directors, followed a repertory model in presenting a summer festival program of musicals and comic opera.  LOOK's annual summer season of performances at the Tulsa Performing Arts Center is known as "The LOOK Festival."

Festival de Beaune: The Festival de Beaune: "Festival international d’opéra baroque" is a month-long annual summer festival of baroque opera in Beaune, France.  It is notable for revivals of many baroque operas and performances of Mozart on original instruments.

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.

Supporting paragraphs: Ravello Festival Parsifal
Answer: three