Question: Which opera has more acts, Faust or La vestale?
Context: La vestale ("The Vestal Virgin") is an opera composed by Gaspare Spontini to a French libretto by Étienne de Jouy.  It takes the form of a "tragédie lyrique" in three acts.  It was first performed on 15 December 1807 by the Académie Impériale de Musique (Paris Opera) at the Salle Montansier, and is regarded as Spontini's masterpiece.  The musical style shows the influence of Gluck and looks forwards to the works of Berlioz, Wagner and French Grand Opera. Doktor Faust is an opera by Ferruccio Busoni with a German libretto by the composer himself, based on the myth of Faust.  Busoni worked on the opera, which he intended as his masterpiece, between 1916 and 1924, but it was still incomplete at the time of his death.  His pupil Philipp Jarnach finished it.  More recently, in 1982, Antony Beaumont completed the opera using sketches by Busoni which were previously thought to have been lost.  Nancy Chamness has published an analysis of the libretto to "Doktor Faust" and a comparison with Goethe's version. Faust is an opera by the German composer Louis Spohr.  The libretto, by Josef Karl Bernard, is based on the legend of Faust; it is not influenced by Goethe's Faust, though "" had been published in 1808.  Instead, Carl Bernard's libretto draws mainly on Faust plays and poems by Maximilian Klinger and Heinrich von Kleist.  Spohr's "Faust" is an important work in the history of German Romantic opera. The Temple of Shadows (French:La vestale du Gange) is a 1927 French silent film directed by  André Hugon and starring Camille Bert, Max Tréjean and Georges Melchior. La Vestale (en.  "The Vestal") is a "grand ballet" in three acts and four scenes with choreography by Marius Petipa and music by Mikhail Ivanov.  The ballet was first presented by the Imperial Ballet on 17 February [O.S. 29 January] 1888 at the Imperial Mariinsky Theatre in St. Petersburg, Russia. Giuseppina Ronzi de Begnis (born Giuseppina Ronzi; Milan 11 January 1800 – died, Florence, 7 June 1853) was an Italian soprano opera singer famous for the roles written for her by the prominent composers of the 1820s and 1830s.  Her father, Gaspare, was a prominent ballet dancer and choreographer, and her mother, Antonia, a ballerina.  Her brothers Stanislao and Pollione were opera singers.  As a singer, she made her debut in Naples at the Teatro dei Fiorentini in 1814 in Giovanni Cordella's "L'Avaro", followed by important engagements in Bologna in 1816, also appearing in Genoa, Florence; in 1817 as Giulia "La Vestale", and in Bergamo.  She married Italian bass Giuseppe de Begnis (1793–1849) when she was only 16.  The marriage lasted only a few years and the two separated in 1825. Faust is a grand opera in five acts by Charles Gounod to a French libretto by Jules Barbier and Michel Carré from Carré's play "Faust et Marguerite", in turn loosely based on Johann Wolfgang von Goethe's "Faust, Part One".  It debuted at the Théâtre Lyrique on the Boulevard du Temple in Paris on 19 March 1859, with influential sets designed by Charles-Antoine Cambon and Joseph Thierry, Jean Émile Daran, Édouard Desplechin, and Philippe Chaperon. Vincenzo Pucitta (or Puccitta) (17 February 1778 – 20 December 1861) was a nineteenth-century Italian composer.  Born in Civitavecchia, he wrote more than 20 operas during his career.  One of his works, "La Vestale", after its premiere in London (1810), was also sung in Lisbon (1816), Milan (1816) and Rio de Janeiro (1817).  He died in Milan. Étienne Lainez (or Lainé, Laînez) (23 May 1753 – 15 September 1822) was a French operatic tenor, and leading figure at the Paris Opera for over thirty years.  In the course of his career there he created many tenor roles including Rodrigue in Sacchini's "Chimène", Énée in Piccinni's "Didon", Narcisse in Gluck's "Echo et Narcisse", and Licinius in Spontini's "La vestale". Faust and Marguerite is a romantic opera in three acts, dating from 1855, based on the Faust legend.  The score was composed by Meyer Lutz.  The libretto was written by Henri Drayton based on the Johann Wolfgang von Goethe play "Faust".  The 1900 film "Faust and Marguerite" is an adaptation of the play.  It was directed by Edwin S. Porter, three years before he directed The Great Train Robbery.
Answer: Faust