Question: Which opera has more acts, Mireille or Der Zwerg?

Context paragraphs:
Der Zwerg: Der Zwerg ("The Dwarf"), Op.  17, is an opera in one act by Austrian composer Alexander von Zemlinsky to a libretto by Georg Klaren, freely adapted from the short story "The Birthday of the Infanta" by Oscar Wilde.

The Seventh Dwarf: The Seventh Dwarf (German: "Der 7bte Zwerg" ), is a German 3D computer-animated film, created in 2014.  The movie is based upon the fairy tale Sleeping Beauty and characters from Snow White and the Seven Dwarfs.  It is a sequel to the films "7 Dwarves – Men Alone in the Wood" (2004) and "7 Dwarves: The Forest Is Not Enough" (2006).

Der Widerspänstigen Zähmung: Der Widerspänstigen Zähmung (also: Der Widerspenstigen Zähmung ) (English: "The Taming of the Shrew") is a German-language comic opera in four acts by the German composer Hermann Goetz.  It was written between 1868 and 1872 and first performed at the National Theatre Mannheim on 11 October 1874 under the conductor Ernst Frank.  The libretto, by and the composer, is based on Shakespeare's "The Taming of the Shrew".  The style of the opera shows Goetz turning away from the musical ideas of Richard Wagner towards the classicism of Mozart.  "Der Widerspänstigen Zähmung " was a huge success, not only in Germany but in the United States and in Great Britain, where it received high praise from George Bernard Shaw.

Flames of Paris: Flames of Paris (Russian: Пла́мя Пари́жа ) is a full-length ballet in four acts, choreographed by Vasily Vainonen to music by Boris Asafyev based on songs of the French Revolution.  The libretto by Nicolai Volkov and Vladimir Dmitriev was adapted from a book by Felix Gras.  It was premiered at the Kirov Theatre in Leningrad on 7 November 1932, with Natalia Dudinskaya as Mireille de Poitiers, Vakhtang Chabukiani as Jérôme, Olga Jordan as Jeanne, Nina Anisimova as Thérèse, and Konstantin Sergeyev as Mistral.  The conductor was Yuri Fayer.

Mireille (opera): Mireille is an 1864 opera in five acts by Charles Gounod to a French libretto by Michel Carré after Frédéric Mistral's poem "Mireio".  The vocal score is dedicated to George V of Hanover.

Fidelio: Fidelio (originally titled Leonore, oder Der Triumph der ehelichen Liebe ; English: "Leonore, or The Triumph of Marital Love"), Op.  72, is Ludwig van Beethoven's only opera.  The German libretto was originally prepared by Joseph Sonnleithner from the French of Jean-Nicolas Bouilly, with the work premiering at Vienna's Theater an der Wien on 20 November 1805.  The following year, helped shorten the work from three acts to two.  After further work on the libretto by Georg Friedrich Treitschke, a final version was performed at the Kärntnertortheater on 23 May 1814.  By convention, both of the first two versions are referred to as "Leonore".

Der Wildschütz: Der Wildschütz oder Die Stimme der Natur ("The Poacher, or The Voice of Nature") is a German "Komische Oper", or comic opera, in three acts by Albert Lortzing from a libretto by the composer adapted from the comedy "Der Rehbock, oder Die schuldlosen Schuldbewussten" by August von Kotzebue.  It had its premiere at the Stadttheater in Leipzig on 31 December 1842.

Der junge Lord: Der junge Lord ("The Young Lord") is an opera in two acts by Hans Werner Henze to a German libretto by Ingeborg Bachmann, after Wilhelm Hauff's "Der Affe als Mensch" ("The Ape as Man") from "Der Scheik von Alexandria und seine Sklaven" ("The Sheik of Alexandria and his Slaves").

Der Zwerg (Schubert): Der Zwerg (The Dwarf) is a lied (or ballad) for voice and piano by Franz Schubert, written in the mid-1820s on a text by Matthäus von Collin.  In Otto Erich Deutsch's catalogue of Schubert's works, it is Op. 22, No. 1, D. 771.

Nigel Levings: Nigel Levings is an Australian stage lighting designer.  He has designed lights for over 400 productions.  He works extensively on operas, and has designed a large portion of Opera Australia's repertoire.  Some of his most significant works include operas such as "The Demon" at the Bregenz Festival and for Zurich Opera; "Billy Budd" for the Welsh National Opera, Opera Australia, Canadian Opera Company, and for the English National Opera; "Nabucco" for Opera Australia; "Wozzeck" for Opera Australia; "L'Orfeo" for Innsbrucker Festwochen der Alten Musik and the Berlin State Opera; "A Midsummer Night's Dream" for the 1994 Edinburgh Festival; "La Belle Vivette" for the English National Opera; "Simon Boccanegra" for the Royal Opera House, Washington National Opera, and Dallas Opera; "Falstaff" for Théâtre du Châtelet; "Idomeneo", "Turandot", and "The Barber of Seville" for the Houston Grand Opera; and "Queen of Spades" for the Dallas Opera.

Supporting paragraphs: Mireille (opera) Der Zwerg
Answer: Mireille