Question: Which opera has more acts, Madama Butterfly or Erwartung?

Context paragraphs:
Lilian Sukis: Lilian Sukis (born 29 June 1939, Kaunas) is a Canadian operatic soprano of Lithuanian birth.  After earning diplomas from the University of Toronto and McMaster University, she made her professional opera debut in 1964 as Kate Pinkerton in Giacomo Puccini's "Madama Butterfly" with the Canadian Opera Company.  In 1965 she sang the role of Countess Almaviva in Wolfgang Amadeus Mozart's "The Marriage of Figaro" at the Stratford Festival.  That same year she became a pupil at the Metropolitan Opera Studio and School.  She made her debut at the Met in 1967 as Helen Niles in the world premiere of Marvin David Levy's "Mourning Becomes Electra".  In 1969 she became a member of the Bavarian State Opera where she remained for more than 20 years.  She has also appeared as a guest artist with several major opera houses and opera festivals internationally, including the Bayreuth Festival, the Frankfurt Opera, Graz, the Hamburg State Opera, the Salzburg Festival, and the Vienna State Opera among others.

Zheng Cao: Zheng Cao (July 9, 1966February 21, 2013) was a Chinese-born, American operatic mezzo-soprano known for her signature role of Suzuki in "Madama Butterfly".  She performed this role with opera companies such as San Francisco Opera, Grand Théâtre de Genève, Pittsburgh Opera, Vancouver Opera, Washington National Opera, San Diego Opera, and under the baton of Seiji Ozawa with the Boston Symphony Orchestra.  Her portrayal of the role of Cherubino in "The Marriage of Figaro" also earned her recognition at several American opera companies, including San Francisco Opera, Pittsburgh Opera, and Houston Grand Opera.  She died from lung cancer in San Francisco, California in 2013.

Emilio Venturini: Emilio Venturini (1878 - 1952) was an Italian operatic lyric tenor known for his portrayal of character roles.  He made his professional opera debut in 1900 in Italy where he remained for the next several years.  In 1901 he sang the role of Brighella in Mascagni's "Le maschere" at the Teatro Regio in Turin.  He made his La Scala debut in 1903 as Froh in Wagner's "Das Rheingold" and sang in the premiere of Umberto Giordano's "Siberia".  In 1904, he originated the role of Prince Yamadori in Puccini's "Madama Butterfly" at La Scala.  In 1905, Venturini joined the roster of the Opéra National de Paris.  In 1907 he moved to London to sing with Royal Opera at Covent Garden.  In 1910, Venturini became a member of the Chicago Opera Association where he performed roles until the summer of 1917.  While in Chicago he sang mostly character parts but did sing some major roles like Turiddu in "Cavalleria rusticana", Edgardo in "Lucia di Lammermoor" and the Pinkerton in "Madama Butterfly".  In 1911 he sang the roles of Cassio in Verdi's "Otello" and Spoletta in Puccini's "Tosca" at the Metropolitan Opera.  Venturini also returned to Italy for brief periods in 1910, 1911, and 1916 to perform roles with the Teatro Massimo in Palermo.  In 1921, Venturini joined the roster at La Scala and sang roles with that opera house until 1948.  He notably originated the roles of Il Tempiere in Boito's "Nerone" in 1924 and Pang in Puccini's "Turandot" in 1926.  and was the first to record the role of Nereo in Boito's "Mefistofele" in the 1931 La Scala recording.

La fanciulla del West: La fanciulla del West ("The Girl of the West") is an opera in three acts by Giacomo Puccini to an Italian libretto by and , based on the play "The Girl of the Golden West" by the American author David Belasco.  "Fanciulla" followed "Madama Butterfly", which was also based on a Belasco play.  The opera has fewer of the show-stopping highlights that are characteristic of other Puccini works, but is admired for its impressive orchestration and for a score that is more melodically integrated than is typical of his previous work.  "Fanciulla" displays influences from composers Claude Debussy and Richard Strauss, without being in any way imitative.  Similarities between the libretto and the work of Richard Wagner have also been found, though some attribute this more to the original plot of the play, and have asserted that the opera remains quintessentially Italian.

Madama Butterfly: Madama Butterfly (] ; "Madam Butterfly") is an opera in three acts (originally two) by Giacomo Puccini, with an Italian libretto by Luigi Illica and Giuseppe Giacosa.

The Dancing Girl (short story): "The Dancing Girl" (舞姫 , Maihime ) was the first published short story by the Japanese writer Mori Ōgai.  The story first appeared in "Kokumin no Tomo" (People's Friend, 国民之友) in 1890, and is based on Mori's own experiences as a medical student in Germany.  In some ways, this tale foreshadows Puccini's "Madama Butterfly", which deals with a similar theme but with a slight role reversal: in "Madama Butterfly", a Western man abandons a Japanese woman, while in "The Dancing Girl" a Japanese man leaves a Western woman.

Un bel dì vedremo: "Un bel dì vedremo " ("One fine day we’ll see") is a soprano aria from the opera "Madama Butterfly" (1904) by Giacomo Puccini to a libretto by Luigi Illica and Giuseppe Giacosa.  It is sung by Cio-Cio San/Madama Butterfly (on stage with Suzuki), when she imagines and performs the return of Pinkerton on a white ship, signalled by a thread of smoke on the far horizon.

Madame Butterfly (play): Madame Butterfly: A Tragedy of Japan is a play in one act by David Belasco adapted from John Luther Long's 1898 short story "Madame Butterfly".  It premiered on March 5, 1900, at the Herald Square Theatre in New York City and became one of Belasco's most famous works.  The play and Long's short story served as the basis for the libretto of Puccini's 1904 opera, "Madama Butterfly".  The title role was originally played in New York and London by Blanche Bates; in 1900–01 in New York by Valerie Bergere; and in 1913 by Clara Blandick.

Erwartung: Erwartung ("Expectation"), Op.  17, is a one-act monodrama in four scenes by Arnold Schoenberg to a libretto by .  Composed in 1909, it was not premiered until 6 June 1924 in Prague conducted by Alexander Zemlinsky with Marie Gutheil-Schoder as the soprano.  The opera takes the unusual form of a monologue for solo soprano accompanied by a large orchestra.  In performance, it lasts for about half an hour.  It is sometimes paired with Béla Bartók's opera "Bluebeard's Castle" (1911), as the two works were roughly contemporary and share similar psychological themes.  Schoenberg's succinct description of "Erwartung " was as follows:

Madame Butterfly (1954 film): Madame Butterfly (Italian: Madama Butterfly ) is a 1954 Italian-Japanese musical film directed by Carmine Gallone and starring Kaoru Yachigusa, Nicola Filacuridi and Michiko Tanaka.  It is based on the opera "Madama Butterfly" by Giacomo Puccini.

Supporting paragraphs: Madama Butterfly Erwartung
Answer: Madama Butterfly