Question: How many acts are in the opera based on an 1820 poem by Alexander Pushkinhave, in which Mariya Matveyevna Stepanova created the lead soprano role?

full_context: Document 1: Mikhail Glinka: Mikhail Ivanovich Glinka (Russian: Михаи́л Ива́нович Гли́нка ; 1 June [O.S. 20 May] 1804 15 February [O.S. 3 February] 1857 ) was the first Russian composer to gain wide recognition within his own country, and is often regarded as the fountainhead of Russian classical music. Glinka's compositions were an important influence on future Russian composers, notably the members of The Five, who took Glinka's lead and produced a distinctive Russian style of music.
Document 2: Dubrovsky (opera): Dubrovsky (Russian: "Дубровский" ) is an opera in four acts (5 scenes) Op. 58, by Eduard Nápravník, to a Russian libretto by Modest Ilyich Tchaikovsky after the novel of the same title (1832) by Alexander Pushkin.
Document 3: A Life for the Tsar: A Life for the Tsar (Russian: Жизнь за царя , "Zhizn' za tsarya"), as it is known in English, although in Soviet times its name was "Ivan Susanin" (Russian: Иван Сусанин ) is a "patriotic-heroic tragic opera" in four acts with an epilogue by Mikhail Glinka. The original Russian libretto, based on historical events, was written by Nestor Kukolnik, Egor Fyodorovich (von) Rozen, Vladimir Sollogub and Vasily Zhukovsky. It premiered on 27 November 1836 OS (9 December NS) at the Bolshoi Kamenny Theatre in St. Petersburg. The historical basis of the plot involves Ivan Susanin, a patriotic hero of the early 17th century who gave his life in the expulsion of the invading Polish army for the newly elected Tsar Mikhail, the first of the Romanov dynasty, elected in 1613.
Document 4: 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 5: Anna Nechaeva: 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".
Document 6: Artyom Melikhov: Artyom Melikhov is a Russian tenor singer who was born in Saint Petersburg. He graduated from both the Glinka Choral School and Saint Petersburg Conservatory where he was under guidance from Yelizaveta Kudryavtseva till 2006. In 2008 under guidance from Valery Gergiev he played a role of one of the Japanese envoys in "Le Rossignol" opera and during the same year played a soloist role in "Chimes" at the Mariinsky Theatre. In 2009 he had his first appearance with Mariinsky Theatre where he played in an opera called "War and Peace". That year was followed by such 2010 debuts as the "The Mystery of the Apostle Paul" in which he sang in a role of "Nero" at the Mariinsky Theatre and another "War and Peace" performance, this time at the John F. Kennedy Center for the Performing Arts. In 2011 he became the Mariinsky Academy of Young Singers soloist and the same year performed the role of "Ovlur" in an opera called "Prince Igor" following by his appearance in "Dead Souls" and "Ariadne auf Naxos". In May 2013 he was "Rienzi" performer at the Saratov Opera under Alexei Stepanyuk's baton and the same year sang at the Carmina Burana opera after which he went on a tour to Naples where he performed at the Teatro di San Carlo.
Document 7: Stefka Evstatieva: Stefka Evstatieva (Bulgarian: Стефка Евстатиева ) (born 7 May 1947) is a Bulgarian operatic soprano. Born in Ruse, she studied voice at the State Academy of Music in Sofia with Elena Kisselova. She began her career with the Ruse Opera where she made her debut as Amelia in "Un ballo in maschera" and sang there from 1971 to 1979. In 1974 Stefka Evstatieva won the second prize at the International Tchaikovsky Competition in Moscow. (No first prize was awarded). In 1978 she won the Grand Prize of Belgian Radio & TV Belcanto Competition; in 1979 Grand Prize and Golden Ring in the Young Singers Competition in Sofia; and in 1982 the Best Performance Award at the Arena di Verona.
Document 8: Nestor Kukolnik: Nestor Vasilievich Kukolnik (Russian: Нестор Васильевич Кукольник ) (1809–1868) was a Russian playwright and prose writer of Carpatho-Rusyn origin. Immensely popular during the early part of his career, his works were subsequently dismissed as sententious and sentimental. Today, he is best remembered for having contributed to the libretto of the first Russian opera, "A Life for the Tsar" by Mikhail Glinka. Glinka also set many of his lyrics to music.
Document 9: 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.
Document 10: 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 11: Ludmilla Azova: Ludmilla Azova is a soprano opera singer who studied at the New York College of Music and has appeared as a soloist with the New York Philharmonic and the National Orchestra Association, and also performed the role of Fiordiligi in Mozart's "Così fan tutte" with the Bermuda Festival Theatre. Other operatic roles performed in New York include Mimi in "La bohème", "Madame Butterfly" and Marguerite in "Faust". In 1966, she appeared as Anna Gomez in a production of Gian Carlo Menotti's "The Consul" at New York City Opera. Azova has also been an active recitalist.In a review, dated October 6, 1969, in the New York Times, Peter G. Davis wrote, "Ludmilla Azova brought a bright, silvery soprano and an abundance of authoritative style to her Russian song recital at Town Hall late yesterday afternoon.Born in Europe of Russian parents, Miss Azova clearly knows where of what she sings...In addition to the charm and elegance of her interpretations, Miss Azova's well-schooled, even, secure soprano consistently delighted the ear... She is a beautiful woman, a charming recitalist and a singer of accomplishment."
Document 12: Mariya Matveyevna Stepanova: Mariya Matveyevna Stepanova (Russian: Мария Матвеевна Степанова) (1811 or 1816 – 1903) was a Russian opera singer who created the leading soprano roles in "A Life for the Tsar", "Ruslan and Lyudmila", and "Dmitry Donskoy".
Document 13: Rusalka (Dargomyzhsky): Rusalka (Russian: Руса́лка ) is an opera in four acts, six tableaux, by Alexander Dargomyzhsky, composed during 1848-1855. The Russian libretto was adapted by the composer from Pushkin's incomplete dramatic poem of the same name. It premiered on 4 May 1856 (Old Style) at the Theatre-circus, conducted by Konstantin Lyadov (father of Anatoly Lyadov), choreographed by Marius Petipa and Nikolay Goltz, but was badly received predominantly by the aristocracy.
Document 14: 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 15: Julia Lezhneva: Julia Lezhneva (Russian: Юлия Михайловна Лежнева) (born December 5, 1989) is a Russian soprano opera singer and recitalist, specialising in soprano and coloratura mezzo-soprano material of the 18th and early 19th century. She studied with Tamara Cherkasova, Irina Zhurina, Elena Obraztsova, Dennis O'Neill and Yvonne Kenny.
ground_truth: five