Question: Who is in charge of the country featuring Tresibaba mountain?

full_context: Document 1: President of Russia: The president is elected directly through a popular vote to a six - year term. The law prohibits anyone from ever being elected to the presidency for a third consecutive term. In all, three individuals have served four presidencies spanning six full terms. On 7 May 2012, Vladimir Putin became the fourth and current president.
Document 2: Trijebine: Trijebine is a village in the municipality of Sjenica, Serbia. According to the 2002 census, the village has a population of 397 people.
Document 3: President of South Africa: The President is elected by the National Assembly, the lower house of Parliament, and is usually the leader of the largest party, which has been the African National Congress since the first non-racial elections were held on 27 April 1994. The Constitution limits the president's time in office to two five - year terms. The first president to be elected under the new constitution was Nelson Mandela. The incumbent is Cyril Ramaphosa, who was elected by the National Assembly on 15 February 2018 following the resignation of Jacob Zuma.
Document 4: Ostrozub: Ostrozub (Serbian Cyrillic: Острозуб) is a mountain in southern Serbia, near the town of Crna Trava. It forms a continuous range with Čemernik mountain. Its highest peak "Ostrozupska čuka" has an elevation of 1,546 meters above sea level.
Document 5: Portugal: The President, who is elected to a five-year term, has an executive role: the current President is Aníbal Cavaco Silva. The Assembly of the Republic is a single chamber parliament composed of 230 deputies elected for a four-year term. The Government is headed by the Prime Minister (currently António Costa) and includes Ministers and Secretaries of State. The Courts are organized into several levels, among the judicial, administrative and fiscal branches. The Supreme Courts are institutions of last resort/appeal. A thirteen-member Constitutional Court oversees the constitutionality of the laws.
Document 6: Portugal: The Head of State of Portugal is the President of the Republic, elected to a five-year term by direct, universal suffrage. He or she has also supervision and reserve powers. These powers are often compared[by whom?] with the "moderator power" that was held by the King in the Portuguese Constitutional Monarchy.[citation needed] Presidential powers include the appointment of the Prime Minister and the other members of the Government (where the President takes into account the results of legislative elections); dismissing the Prime Minister; dissolving the Assembly of the Republic (to call early elections); vetoing legislation (which may be overridden by the Assembly with a supermajority); and declaring a state of war or siege. The President is also the ex officio Commander-in-Chief of the Armed Forces.
Document 7: Mali: The president serves as a chief of state and commander in chief of the armed forces. A prime minister appointed by the president serves as head of government and in turn appoints the Council of Ministers. The unicameral National Assembly is Mali's sole legislative body, consisting of deputies elected to five-year terms. Following the 2007 elections, the Alliance for Democracy and Progress held 113 of 160 seats in the assembly. The assembly holds two regular sessions each year, during which it debates and votes on legislation that has been submitted by a member or by the government.
Document 8: Sarajevo: Sarajevo is near the geometric center of the triangular-shaped Bosnia-Herzegovina and within the historical region of Bosnia proper. It is situated 518 meters (1,699 ft) above sea level and lies in the Sarajevo valley, in the middle of the Dinaric Alps. The valley itself once formed a vast expanse of greenery, but gave way to urban expansion and development in the post-World War II era. The city is surrounded by heavily forested hills and five major mountains. The highest of the surrounding peaks is Treskavica at 2,088 meters (6,850 ft), then Bjelašnica mountain at 2,067 meters (6,781 ft), Jahorina at 1,913 meters (6,276 ft), Trebević at 1,627 meters (5,338 ft), with 1,502 meters (4,928 ft) Igman being the shortest. The last four are also known as the Olympic Mountains of Sarajevo (see also 1984 Winter Olympics). The city itself has its fair share of hilly terrain, as evidenced by the many steeply inclined streets and residences seemingly perched on the hillsides.
Document 9: Serbia: The President of the Republic ("Predsednik Republike") is the head of state, is elected by popular vote to a five-year term and is limited by the Constitution to a maximum of two terms. In addition to being the commander in chief of the armed forces, the president has the procedural duty of appointing the prime minister with the consent of the parliament, and has some influence on foreign policy. Aleksandar Vučić of the Serbian Progressive Party is the current president following the 2017 presidential election. Seat of the presidency is Novi Dvor.
Document 10: Sjeverin: Sjeverin (Cyrillic script: Сјеверин) is a village in the Raška (Sandžak) area of Serbia, located in the municipality of Priboj, in the district of Zlatibor, close to the border with Bosnia. In 2002 it had a population of 337, the majority Serbs.
Document 11: Tresibaba: Tresibaba (Serbian Cyrillic: Тресибаба) is a mountain in southeastern Serbia, between the towns of Svrljig and Knjaževac. Its highest peak "Čukar" has an elevation of 826 meters above sea level.
Document 12: Tomislav Nikolić: Tomislav Nikolić (, ; born 15 February 1952) is a Serbian politician who served as the President of Serbia from 2012 to 2017. He is also the founder of the Serbian Progressive Party, and he led the party until his election as President. In the 2012 presidential election, he was elected to a five-year term as President in a second round of voting.
Document 13: Korab III: Korab III is a mountain peak located in eastern Albania. Korab III is a peak of Mount Korab and is the third highest peak of this mountain. The height of Korab III is not known, the only thing that is known about its height is that it is lower than Korab II at and higher than Shulani i Radomirës at . So Korab III is somewhere between . Korab III just like Korab II is not yet named. It is not located in maps and does not have an official name. It is one of the many mountains in Albania waiting to be discovered.
Document 14: Mrveš: Mrves (Mrvesh) is a little village in southern Serbia (Serbia and Montenegro), with about 200 inhabitants (all Serbians). The nearest big town is Leskovac. As many other villages in Serbia, Mrves has a problem with the constant migration of its inhabitants to larger cities and to foreign countries. People in Mrveš use a modified version of Serbian language.
Document 15: Greece: According to the Constitution, executive power is exercised by the President of the Republic and the Government. From the Constitutional amendment of 1986 the President's duties were curtailed to a significant extent, and they are now largely ceremonial; most political power thus lies in the hands of the Prime Minister. The position of Prime Minister, Greece's head of government, belongs to the current leader of the political party that can obtain a vote of confidence by the Parliament. The President of the Republic formally appoints the Prime Minister and, on his recommendation, appoints and dismisses the other members of the Cabinet.
ground_truth: Aleksandar Vučić
sub_queries: Tresibaba >> country Answer: Serbia
Who was in charge of Serbia ? Answer: Aleksandar Vučić