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

Context articles: Nikolay and Medea Figner
Iolanta
King René's Daughter
Amir Hosseinpour
Piano Concerto (Tippett)
Anna Nechaeva
Petr Migunov
The Midsummer Marriage
Le songe d'une nuit d'été
Michael Tippett

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.
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.
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.
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.
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".
Anna Nechaeva is Russian soprano singer who was born in Saratov and used attend its Conservatory in 1996.
 Later she was offered to perform the role of "Tatiana" in "Eugene Onegin" at the Saint Petersburg Conservatory and by 2003 became a soloist at the Saint Petersburg Opera where she continued her original role as well as other title roles in Giacomo Puccini's "Gianni Schicchi", Madama Butterfly, and "Suor Angelica".
 From 2008 to 2011 she became a soloist at the Mikhaylovsky Theatre where she performed roles of "Nedda" in "Pagliacci" and "Rachel" in "The Jews" as well as the title roles of "Rusalka" and of course "Tatiana" in "Eugene Onegin".
 In 2012, she made her first public appearance with Bolshoi Theatre where she sang in "The Enchantress" portraying "Nastasya" becoming soloist there the same year.
 After her debut, she performed such roles as "Iolanta" in an opera of the same name as well as "Liu" in "Turandot" and "Yaroslavna" in "Prince Igor".
Petr Migunov (Russian: Пётр Викторович Мигунов ; born August 24, 1974) is a Russian opera and classical singer (bass) who graduated from the Saint Petersburg Conservatory and was a winner of both the Tokyo and Salzburg Competitions in 1997 and 1999 respectively.
 He is well known for his performances as the bass soloist in Beethoven's "Ninth Symphony" as well as in the requiems of Mozart and Faure.
 He is also known for his singing of operatic bass roles such as Mephistopheles in "Faust", Prince Gremin in "Eugene Onegin", René in "Iolanta" and Don Iñigo in "L'heure espagnole".
 In 2000 he performed at both Carnegie Hall and Lincoln Center Theater and since that time performs in Russia where he is a soloist of the Bolshoi Theatre.
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.
Le songe d'une nuit d'été ("A Midsummer Night's Dream") is an opéra-comique in three acts composed by Ambroise Thomas to a French libretto by Joseph-Bernard Rosier and Adolphe de Leuven.
 Although it shares the French title for Shakespeare's play, "A Midsummer Night's Dream", its plot is not based on the play.
 Shakespeare himself is a character in the opera as are Elizabeth I and Falstaff.
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".