Question: Who was in charge of the country Ponor is located?

full_context: Document 1: Ponor (Pirot): Ponor is a village in the municipality of Pirot, Serbia. According to the 2002 census, the village has a population of 379 people.
Document 2: 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 3: Mala Kamenica: Mala Kamenica is a village in the municipality of Negotin, Serbia. According to the 2002 census, the village has a population of 392 people.
Document 4: 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 5: 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 6: Ponor (Knjaževac): Ponor is a village in the municipality of Knjaževac, Serbia. According to the 2002 census, the village has a population of 144 people.
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: Konjuva: Konjuva is a village in the municipality of Kuršumlija, Serbia. According to the 2002 census, the village has a population of 169 people.
Document 9: Mala Bresnica: Mala Bresnica is a village in the municipality of Kučevo, Serbia. According to the 2002 census, the village has a population of 135 people.
Document 10: Ponarth: Dimitrovo () is part of the Moskovsky District of Kaliningrad, Russia. Until 1947, it was known by its German language name Ponarth as first a suburb of and then a quarter of Königsberg, Germany, located southwest of the city center.
Document 11: Varna (Šabac): Varna is a village in the municipality of Šabac, Serbia. According to the 2002 census, the town has a population of 1720 people.
Document 12: 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 13: 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 14: Gornje Gare: Gornje Gare is a village in the municipality of Crna Trava, Serbia. According to the 2002 census, the village has a population of 80 people.
Document 15: 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.
ground_truth: Aleksandar Vučić
sub_queries: Ponor >> country Answer: Serbia
Who was in charge of Serbia ? Answer: Aleksandar Vučić