Question: Which opera has more acts, Iolanta or The Midsummer Marriage?

full_context: Document 1: Amir Hosseinpour: Amir Hosseinpour is an opera director and choreographer who has worked in major opera houses around the world. He is a collaborator with directors such as Pierre Audi, founder of the Almeida Theatre, Nigel Lowery, and choreographer Jonathan Lunn. His production of Haydn's Orlando Paladino, co-directed with Nigel Lowery, continues to be broadcast on Sky Arts HD on a regular basis. Some of his biggest productions have been recorded for international DVD release. His choreography for Michael Tippett's The Midsummer Marriage at the Bavarian State Opera in February 1998 was described as 'stunning' by The Daily Telegraph critic, Rupert Christiansen, and it was also highly praised by Wolfgang Sandner in the Frankfurter Allgemeine Zeitung. Other outstanding reviews for Hosseinpour's work in the German-speaking newspaper Frankfurter Allgemeine Zeitung (FAZ) were for Les Paladins (Rameau) at Basel in December 2004, reviewed by Gerhard Koch, Petrushka at Munich reviewed by Jochen Schmidt in December 1999 and Orphée et Eurydice at the Bavarian State Opera in November 2003.
Document 2: The Tsar's Bride (opera): The Tsar's Bride (Russian: Царская невеста , "Tsarskaya nevesta") is an opera in four acts by Nikolai Rimsky-Korsakov, the composer's tenth opera. The libretto, by Ilia Tyumenev, is based on the drama of the same name by Lev Mey. Mey's play was first suggested to the composer as an opera subject in 1868 by Mily Balakirev. (Alexander Borodin, too, once toyed with the idea.) However, the opera was not composed until thirty years later, in 1898. The first performance of the opera took place in 1899 at the Moscow theater of the Private Opera of S.I. Mamontov.
Document 3: The Medium: The Medium is a short (one-hour-long) two-act dramatic opera with words and music by Gian Carlo Menotti. Commissioned by Columbia University, its first performance was there on 8 May 1946. The opera's first professional production was presented on a double bill with Menotti's "The Telephone" at the Heckscher Theater, New York City, February 18–20, 1947 by the Ballet Society. The Broadway production took place on May 1, 1947, at the Ethel Barrymore Theater with the same cast.
Document 4: Michael Tippett: Sir Michael Kemp Tippett {'1': ", '2': ", '3': ", '4': "} (2 January 1905 – 8 January 1998) was an English composer who rose to prominence during and immediately after the Second World War. In his lifetime he was sometimes ranked with his contemporary Benjamin Britten as one of the leading British composers of the 20th century. Among his best-known works are the oratorio "A Child of Our Time", the orchestral "Fantasia Concertante on a Theme of Corelli", and the opera "The Midsummer Marriage".
Document 5: Iolanta: Iolanta, Op. 69, (Russian: Иоланта ) is a lyric opera in one act by Pyotr Tchaikovsky. It was the last opera he composed. The libretto was written by the composer's brother Modest Tchaikovsky, and is based on the Danish play "Kong Renés Datter " ("King René's Daughter") by Henrik Hertz, a romanticised account of the life of Yolande de Bar. In the original Danish play, the spelling of the princess's name was "Iolanthe", later adopted for the otherwise unrelated Gilbert and Sullivan operetta of that name. The play was translated by Fyodor Miller and adapted by Vladimir Zotov. The opera received its premiere on 18 December 1892 in Saint Petersburg.
Document 6: King René's Daughter: Kong Renés Datter ("King René’s Daughter") is a Danish verse drama written in 1845 by Henrik Hertz. It is a fictional account of the early life of Yolande of Lorraine, daughter of René of Anjou, in which she is depicted as a beautiful blind sixteen-year-old princess who lives in a protected garden paradise. The play was highly popular in the 19th century. It was translated into many languages, copied, parodied and adapted. The Russian adaptation by Vladimir Zotov was used as the basis for the 1892 opera "Iolanta", written by Tchaikovsky, with libretto by his brother Modest Ilyich Tchaikovsky.
Document 7: The Midsummer Marriage: The Midsummer Marriage is an opera in three acts, with music and libretto by Michael Tippett. The work's first performance was at Covent Garden, 27 January 1955, conducted by John Pritchard. The reception of the opera was controversial, over perceived confusion as to the libretto and Tippett's use of symbols and psychological references. Nonetheless the opera has received at least ten more productions, including two further productions at the Royal Opera, in England, Wales, Scotland, Germany, Sweden and the United States.
Document 8: Modest Ilyich Tchaikovsky: Modest Ilyich Tchaikovsky (Russian: Моде́ст Ильи́ч Чайко́вский ; 13 May [O.S. 1 May] 1850 –15 January [O.S. 2 January] 1916 ) was a Russian dramatist, opera librettist and translator.
Document 9: Ruslan and Lyudmila (opera): Ruslan and Lyudmila (Russian: Руслан и Людмила , "Ruslan i Lyudmila") is an opera in five acts (eight tableaux) composed by Mikhail Glinka between 1837 and 1842. The opera is based on the 1820 poem of the same name by Alexander Pushkin. The Russian libretto was written by Valerian Shirkov, Nestor Kukolnik and N. A. Markevich, among others. Pushkin's death in the famous duel prevented him from writing the libretto himself as planned.
Document 10: Michael Tippett: Sir Michael Kemp Tippett {'1': ", '2': ", '3': ", '4': "} (2 January 1905 – 8 January 1998) was an English composer who rose to prominence during and immediately after the Second World War. In his lifetime he was sometimes ranked with his contemporary Benjamin Britten as one of the leading British composers of the 20th century. Among his best-known works are the oratorio "A Child of Our Time", the orchestral "Fantasia Concertante on a Theme of Corelli", and the opera "The Midsummer Marriage".
Document 11: Nikolay and Medea Figner: Nikolay Figner (1857–1918), lyric tenor, and Medea Figner (1859–1952), mezzo-soprano, later soprano, were a husband-and-wife team of opera singers active in Russia between 1889 and 1904. Medea was Italian-born (her original surname was Mei) but she became completely Russianized after marrying Nikolay. They had separate careers before their wedding, and again after their divorce in 1904, but during the 15 years of their marriage they almost always sang in the same performances. They created the main tenor and soprano roles in two operas by Pyotr Ilyich Tchaikovsky – "The Queen of Spades" and "Iolanta" – and appeared in a number of other important Russian musical premieres.
Document 12: A Midsummer Night's Dream (opera): A Midsummer Night's Dream, Op. 64, is an opera with music by Benjamin Britten and set to a libretto adapted by the composer and Peter Pears from William Shakespeare's play, "A Midsummer Night's Dream". It was premiered on 11 June 1960 at the Aldeburgh Festival, conducted by the composer and with set and costume designs by Carl Toms. Stylistically, the work is typical of Britten, with a highly individual sound-world – not strikingly dissonant or atonal, but replete with subtly atmospheric harmonies and tone painting. The role of Oberon was composed for the countertenor Alfred Deller. Atypically for Britten, the opera did not include a leading role for his partner Pears, who instead was given the comic drag role of Flute/Thisbe.
Document 13: Piano Concerto (Tippett): British composer Michael Tippett composed his Concerto for Piano and Orchestra between 1953 and 1955 on a commission from the City of Birmingham Symphony Orchestra. The overall character of the work was influenced by the composer's hearing German pianist Walter Gieseking rehearse Ludwig van Beethoven's Fourth Piano Concerto in 1950. Its musical content, while influenced by this concerto, was also shaped largely by Tippett's opera "The Midsummer Marriage", which he had completed in 1952. While Tippett had conceived the work initially in the mid-1940s, he had been preoccupied in much of the intervening time with "The Midsummer Marriage".
Document 14: The Knot Garden: The Knot Garden is the third opera by composer Michael Tippett for which he wrote the original English libretto. The work had its first performance at the Royal Opera House, Covent Garden, on 2 December 1970 conducted by Sir Colin Davis and produced by Sir Peter Hall. There is a recording with the original cast.
Document 15: Eugene Onegin (opera): Eugene Onegin (Russian: Евгений Онегин , "Yevgény Onégin"), Op. 24, is an opera ("lyrical scenes") in 3 acts (7 scenes), composed by Pyotr Ilyich Tchaikovsky. The libretto, organised by the composer himself, very closely follows certain passages in Alexander Pushkin's novel in verse, retaining much of his poetry. Tchaikovsky's friend Konstantin Shilovsky contributed M. Triquet's verses in Act 2, Scene 1, while Tchaikovsky himself arranged the text for Lensky's arioso in Act 1, Scene 1, and almost all of Prince Gremin's aria in Act 3, Scene 1.
ground_truth: The Midsummer Marriage