Question: A Life for the Tsar is a  Russian libretto with four acts, Tosca an Italian libretto has how many acts?

full_context: Document 1: Tosca (film): Tosca is a 2001 French drama film directed by Benoît Jacquot based on the opera by Giacomo Puccini.
Document 2: Turandot: Turandot ( ; ] ; ) is an opera in three acts by Giacomo Puccini, completed by Franco Alfano, and set to a libretto in Italian by Giuseppe Adami and Renato Simoni.
Document 3: La bohème: La bohème (] , ] ) is an opera in four acts, composed by Giacomo Puccini to an Italian libretto by Luigi Illica and Giuseppe Giacosa, based on "Scènes de la vie de bohème" by Henri Murger. The world premiere performance of "La bohème" was in Turin on 1 February 1896 at the Teatro Regio, conducted by the young Arturo Toscanini; its U.S. premiere took place the following year, 1897, in Los Angeles. Since then, "La bohème" has become part of the standard Italian opera repertory and is one of the most frequently performed operas worldwide.
Document 4: La Gioconda (opera): La Gioconda is an opera in four acts by Amilcare Ponchielli set to an Italian libretto by Arrigo Boito (as Tobia Gorrio), based on "Angelo, Tyrant of Padua", a play in prose by Victor Hugo, dating from 1835. (This is the same source as Gaetano Rossi had used for his libretto for Mercadante's "Il giuramento" in 1837).
Document 5: Khovanshchina: Khovanshchina (Russian: Хованщина , "Hovánščina", sometimes rendered The Khovansky Affair; since the ending -ščina is pejorative) is an opera (subtitled a 'national music drama') in five acts by Modest Mussorgsky. The work was written between 1872 and 1880 in St. Petersburg, Russia. The composer wrote the libretto based on historical sources. The opera was unfinished and unperformed when the composer died in 1881.
Document 6: Il trovatore: Il trovatore (] ; Italian for "The Troubadour") is an opera in four acts by Giuseppe Verdi to an Italian libretto largely written by Salvadore Cammarano, based on the play "El trovador" (1836) by Antonio García Gutiérrez. It was Gutiérrez's most successful play, one which Verdi scholar Julian Budden describes as "a high flown, sprawling melodrama flamboyantly defiant of the Aristotelian unities, packed with all manner of fantastic and bizarre incident."
Document 7: 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 8: 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 9: 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 10: Grigory Kugushev: Prince Grigory Vasilyevich Kugushev (Russian: Григорий Васильевич Кугушев , 17 March 1824, – 3 October 1871) was a Russian writer, poet and playwright whose comedies (including "Goluboi Kapot", Blue Hood; "Pari", The Bet; "Priyomysh", Foster) had great (if not very lasting) success in the Russian Imperial Theatres in 1850s. More substantial and critically acclaimed were Kugushev's works of fiction, notably "Kornet Otletayev" (Корнет Отлетаев, a three-part novella, first published by "Russky Vestnik" in 1856) and the four-part novel "Postoronneye Vliyaniye" (Постороннее влияние, 1858—1859). He also wrote the libretto for the epic drama opera "Mazeppa" (1859) by Baron
Document 11: 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 12: Turandot (Busoni): Turandot is a 1917 opera with spoken dialogue and in two acts by Ferruccio Busoni. Busoni prepared his own libretto, in German, based on the play by Count Carlo Gozzi. The music for Busoni's opera is based on the incidental music, and the associated "Turandot Suite" (BV 248), which Busoni had written in 1905 for a production of Gozzi's play. The opera is often performed as part of a double bill with Busoni's earlier one-act opera "Arlecchino".
Document 13: 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 14: Tosca: Tosca (] ) is an opera in three acts by Giacomo Puccini to an Italian libretto by Luigi Illica and Giuseppe Giacosa. It premiered at the Teatro Costanzi in Rome on 14 January 1900. The work, based on Victorien Sardou's 1887 French-language dramatic play, "La Tosca", is a melodramatic piece set in Rome in June 1800, with the Kingdom of Naples's control of Rome threatened by Napoleon's invasion of Italy. It contains depictions of torture, murder and suicide, as well as some of Puccini's best-known lyrical arias.
Document 15: Michael Glinski: Michael Glinsky (Lithuanian: "Mykolas Glinskis" , Russian: Mikhail Lvovich Glinsky , Polish: "Michał Gliński" ; 1460s – 24 September 1534) was a noble from the Grand Duchy of Lithuania of distant Tatar extraction who was also a tutor of his nephew, Ivan the Terrible. As a young man, Glinsky served in the court of Emperor Maximilian I and earned distinction for his military service. Around 1498 he returned to Lithuania and quickly rose in power and wealth, angering local nobles. Just after commanding the victorious Battle of Kletsk against the Crimean Khanate in August 1506, he was accused of conspiracy against the deceased Grand Duke Alexander Jagiellon and lost all his wealth. Glinsky began an armed rebellion against Sigismund I, the new Grand Duke. The rebellion was unsuccessful and Glinski retreated to the Grand Duchy of Moscow, where he served Vasili III of Russia. When the Muscovite–Lithuanian Wars renewed in 1512, Glinsky was instrumental in helping Moscow to capture Smolensk, a major trading center. However, he was not rewarded with the regency of the city. Angered, he planned to betray Vasili III, but the plot was discovered and he was imprisoned for 12 years. He was freed after his niece Elena Glinskaya married Vasili III in 1526. Before his death in 1533, Vasili appointed Elena and Glinski as protectors of his underage sons Ivan and Yuri. Elena disapproved of Glinsky's influence in the state and had him sent to prison, where he soon died of starvation.
ground_truth: three acts