Question: Who was in charge of the country encompassing Burgenland Croats?

full_context: Document 1: 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 2: 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 3: Slavs: ^1 Also considered part of Rusyns
^2 Considered transitional between Ukrainians and Belarusians
^3 The ethnic affiliation of the Lemkos has become an ideological conflict. It has been alleged that among the Lemkos the idea of "Carpatho-Ruthenian" nation is supported only by Lemkos residing in Transcarpathia and abroad
^4 Most inhabitants of historic Moravia considered themselves as Czechs but significant amount declared their Moravian nationality, different from that Czech (although people from Bohemia and Moravia use the same official language).
^5 Also considered Poles.
^6 There are sources that show Silesians as part of the Poles. Parts of the southmost population of Upper Silesia is sometimes considered Czech (controversial).
Document 4: Southern Europe: Several South Slavic languages are spoken by millions of people in Southern Europe. Serbian is spoken in Serbia, Bosnia, and Croatia; Bulgarian is spoken in Bulgaria; Croatian is spoken in Croatia and Bosnia; Bosnian is spoken in Bosnia; Slovene is spoken in Slovenia; and Macedonian is spoken in Macedonia.
Document 5: Slavs: ^7 A census category recognized as an ethnic group. Most Slavic Muslims (especially in Bosnia, Croatia, Montenegro and Serbia) now opt for Bosniak ethnicity, but some still use the "Muslim" designation. Bosniak and Muslim are considered two ethnonyms for a single ethnicity and the terms may even be used interchangeably. However, a small number of people within Bosnia and Herzegovina declare themselves Bosniak but are not necessarily Muslim by faith.
Document 6: Slavs: ^8 This identity continues to be used by a minority throughout the former Yugoslav republics. The nationality is also declared by diasporans living in the USA and Canada. There are a multitude of reasons as to why people prefer this affiliation, some published on the article.
Document 7: Vladimir Stoychev: In 1944, Stoychev became a member of the Fatherland Front's Bureau of the National Committee. During World War II, Stoychev was in command of the Bulgarian First Army after the country switched allegiance to the Allies. Under Stoychev, the Bulgarian First Army helped the Red Army and Yugoslav Partisans drawing the Nazis out of much of Yugoslavia and Hungary, reaching the Austrian Alps by May 1945. On 8 May 1945, Vladimir Stoychev signed a demarkation agreement with British V Corps commander Charles Keightley in southern Austria. On 24 June 1945, he took part in the Moscow Victory Parade.
Document 8: Slavs: ^9 Sub-groups of Croats include Bunjevci (in Bačka), Šokci (in Slavonia and Vojvodina), Janjevci (in Kosovo), Burgenland Croats (in Austria), Bosniaks (in Hungary), Molise Croats (in Italy), Krashovans (in Romania), Moravian Croats (in the Czech Republic)
Document 9: Slavs: Slavs are customarily divided along geographical lines into three major subgroups: West Slavs, East Slavs, and South Slavs, each with a different and a diverse background based on unique history, religion and culture of particular Slavic groups within them. Apart from prehistorical archaeological cultures, the subgroups have had notable cultural contact with non-Slavic Bronze- and Iron Age civilisations.
Document 10: Josip Broz Tito: On 12 September 1944, King Peter II called on all Yugoslavs to come together under Tito's leadership and stated that those who did not were "traitors", by which time Tito was recognized by all Allied authorities (including the government-in-exile) as the Prime Minister of Yugoslavia, in addition to commander-in-chief of the Yugoslav forces. On 28 September 1944, the Telegraph Agency of the Soviet Union (TASS) reported that Tito signed an agreement with the Soviet Union allowing "temporary entry" of Soviet troops into Yugoslav territory which allowed the Red Army to assist in operations in the northeastern areas of Yugoslavia. With their strategic right flank secured by the Allied advance, the Partisans prepared and executed a massive general offensive which succeeded in breaking through German lines and forcing a retreat beyond Yugoslav borders. After the Partisan victory and the end of hostilities in Europe, all external forces were ordered off Yugoslav territory.
Document 11: Slavs: Slavic standard languages which are official in at least one country: Belarusian, Bosnian, Bulgarian, Croatian, Czech, Macedonian, Montenegrin, Polish, Russian, Serbian, Slovak, Slovene, and Ukrainian. The alphabet depends on what religion is usual for the respective Slavic ethnic groups. The Orthodox use the Cyrillic alphabet and the Roman Catholics use Latin alphabet, the Bosniaks who are Muslims also use the Latin. Few Greek Roman and Roman Catholics use the Cyrillic alphabet however. The Serbian language and Montenegrin language uses both Cyrillic and Latin alphabets. There is also a Latin script to write in Belarusian, called the Lacinka alphabet.
Document 12: 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 13: 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 14: Slavs: The Gorals of southern Poland and northern Slovakia are partially descended from Romance-speaking Vlachs who migrated into the region from the 14th to 17th centuries and were absorbed into the local population. The population of Moravian Wallachia also descend of this population.
Document 15: 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.
ground_truth: Karl Renner
sub_queries: Where are Burgenland Croats located? Answer: Austria
Who was in charge of Austria ? Answer: Karl Renner