Question: Who was in charge of the provisional government in 1945 of the country of the composer of Der lustige Krieg?

full_context: Document 1: Viktor Léon: Victor Léon, also Viktor Léon (born Victor Hirschfeld; 4 January 1858, Szenic, Nyitra County, Kingdom of Hungary, Austrian Empire (today Senica, Slovakia) – 3 February 1940, Vienna) was a well-known Jewish Austrian-Hungarian librettist. He collaborated with Leo Stein to produce the libretto of Franz Lehár's romantic operetta "The Merry Widow" ("Die lustige Witwe").
Document 2: Classical period (music): However, Vienna's fall as the most important musical center for orchestral composition during the late 1820s, precipitated by the deaths of Beethoven and Schubert, marked the Classical style's final eclipse -- and the end of its continuous organic development of one composer learning in close proximity to others. Franz Liszt and Frédéric Chopin visited Vienna when they were young, but they then moved on to other cities. Composers such as Carl Czerny, while deeply influenced by Beethoven, also searched for new ideas and new forms to contain the larger world of musical expression and performance in which they lived.
Document 3: Der lustige Krieg: Der lustige Krieg ("The Merry War") is a three-act operetta composed by Johann Strauss II. The work was first performed on 25 November 1881 at the Theater an der Wien. Its libretto was by F Zell (Camillo Walzel) and Richard Genée. The operetta was well received at its premiere, and was performed 69 times during its first run.
Document 4: Hans Thirring: the University of Vienna until his forced retirement in 1938 after the Anschluss, the annexation of Austria by Nazi Germany. After the end of World War II, he was reinstated and became dean of the philosophical faculty in the years 1946–1947. He was also active in the Socialist Party of Austria and served as member of the Federal Council of Austria during 1957–1963.
Document 5: Buckingham Palace: Before Prince Albert's death, the palace was frequently the scene of musical entertainments, and the greatest contemporary musicians entertained at Buckingham Palace. The composer Felix Mendelssohn is known to have played there on three occasions. Johann Strauss II and his orchestra played there when in England. Strauss's "Alice Polka" was first performed at the palace in 1849 in honour of the queen's daughter, Princess Alice. Under Victoria, Buckingham Palace was frequently the scene of lavish costume balls, in addition to the usual royal ceremonies, investitures and presentations.
Document 6: Austria: After general elections held in October 2006, the Social Democratic Party (SPÖ) emerged as the strongest party, and the Austrian People's Party (ÖVP) came in second, having lost about 8% of its previous polling. Political realities prohibited any of the two major parties from forming a coalition with smaller parties. In January 2007 the People's Party and SPÖ formed a grand coalition with the social democrat Alfred Gusenbauer as Chancellor. This coalition broke up in June 2008.
Document 7: Waltzes from Vienna: Waltzes from Vienna is a 1934 British musical film directed by Alfred Hitchcock, also known as Strauss' Great Waltz. It was part of the cycle of operetta films made in Britain during the 1930s.
Document 8: Prinz Methusalem: Prinz Methusalem ("Prince Methusalem") is an operetta written by Johann Strauss II to a libretto by Karl Treumann, after Victor Wilder and Alfred Delacourt. It was first performed on January 3, 1877 in Vienna at the Carltheater. It achieved a run of eighty performances. The pot-pourri overture incorporates themes from the operetta, as well as other material that might have sometime been part of the planned score.
Document 9: Vienna Walzer Orchestra: The Vienna Walzer Orchestra (German: Wiener Walzer Orchester) is a chamber orchestra based in Vienna, Austria that specializes in traditional Viennese waltzes, polkas, marches and operetta arias from composers such as: J. Strauss II, F. Lehár, C.M. Ziehrer, among others. Their concerts also always include performances by ballet dancers and opera singers.
Document 10: Azerbaijan People's Government: The Firqah-i Dimukrat, or Azerbaijani Democratic Party (ADP), publicly announced its formation in Tabriz on September 3, 1945 by a group of veteran communists headed by Ja'far Pishevari. After the announcement, the communist, Soviet-supported Tudeh party dissolved its Azerbaijan chapter and ordered its members to join ADP. ADP expanded throughout Iranian Azerbaijan, and initiated a local coup d'état with help from Soviet army, who prevented the Iranian army from intervening. During the first week of September 1945, the Azerbaijani Democratic Party, led by Ja'far Pishevari, a long-time leader of the revolutionary movement in Gilan, declared itself to be in control of Iranian Azerbaijan, promised liberal democratic reforms, and disbanded the local branch of Tudeh. Later in September 1945, at its first congress, the Azerbaijani Democratic Party authorized the formation of a peasant's militia. This militia started a bloodless coup on November 18, 1945 and by November 21, 1945 they had captured all remaining government posts in the province, and Iranian Azerbaijan "became an autonomous republic under the direction of a 39-member national executive committee".  The reality of the power seems to have been exercised by Mohammed Biriya, the Minister of Propaganda and head of the local secret police.At the same time, the US was steadily increasing its military assistance to the Iranian government. Under pressure by the Western powers, the Soviet Union revoked its support of the newly created state and the Iranian military succeeded in re-establishing Iranian rule in November 1946. According to Tadeusz Swietochowski:
Document 11: Johann Strauss III: Despite his keen interest in composing, he was better remembered as a conductor. His only stage work, the three-act operetta "Katze und Maus", composed in 1898, premiered in Vienna on 23 December 1898, at the Theater an der Wien. Its public reaction bordered on utter dislike, and music critics called for the distraught composer to reassess himself and to appear under a pseudonym, in order not to tarnish the name of his famous relatives. He salvaged the music score and produced independent pieces of which the waltzes "Sylvanien", Op. 1 and "Leonie", Op. 2 survived obscurity.
Document 12: Hotel Sacher: The Hotel Sacher is a five-star hotel located in the Innere Stadt first district of Vienna, Austria, vis-à-vis to the Vienna State Opera. It is famous for the specialty of the house, the Sachertorte, a chocolate cake with apricot filling. There is also an art gallery in the hotel with works from the 19th century. The hotel is built near the former residence of Antonio Vivaldi.
Document 13: Austria: Karl Renner and Adolf Schärf (Socialist Party of Austria [Social Democrats and Revolutionary Socialists]), Leopold Kunschak (Austria's People's Party [former Christian Social People's Party]), and Johann Koplenig (Communist Party of Austria) declared Austria's secession from the Third Reich by the Declaration of Independence on 27 April 1945 and set up a provisional government in Vienna under state Chancellor Renner the same day, with the approval of the victorious Red Army and backed by Joseph Stalin. (The date is officially named the birthday of the second republic.) At the end of April, most of western and southern Austria were still under Nazi rule. On 1 May 1945, the federal constitution of 1929, which had been terminated by dictator Dollfuss on 1 May 1934, was declared valid again.
Document 14: Southern Europe: The Nazi regime under Adolf Hitler came to power in 1933, and along with Mussolini's Italy sought to gain control of the continent by the Second World War. Following the Allied victory in the Second World War, Europe was divided by the Iron Curtain. The countries in Southeastern Europe were dominated by the Soviet Union and became communist states. The major non-communist Southern European countries joined a US-led military alliance (NATO) and formed the European Economic Community amongst themselves. The countries in the Soviet sphere of influence joined the military alliance known as the Warsaw Pact and the economic bloc called Comecon. Yugoslavia was neutal.
Document 15: L'amico Fritz: While the opera enjoyed some success in its day and is probably Mascagni's most famous work after "Cavalleria rusticana", today it is performed far more rarely than "Cavalleria", which remains Mascagni's only enduringly popular work in America (though in Italy, "L'amico Fritz" and "Iris" are still in the active repertoire). The "Cherry Duet" between Fritz and Suzel in Act 2 is the best known piece in the opera and has never left the duet repertoire.
ground_truth: Karl Renner
sub_queries: Der lustige Krieg >> composer Answer: Johann Strauss II
Johann Strauss II >> country of citizenship Answer: Austria
Who was in charge of Austria ? Answer: Karl Renner