Information: - The Danube (, known by various names in other languages) is Europe's second-longest river, after the Volga River, and also the longest river in the European Union region. It is located in Central and Eastern Europe. - Moesia (, or ; Latin: "Moesia") was an ancient region and later Roman province situated in the Balkans, along the south bank of the Danube River. It included most of the territory of modern-day Serbia (without Vojvodina) and the northern parts of the modern Republic of Macedonia, (Moesia Superior), as well Northern Bulgaria and Romanian Dobrudja, (Moesia Inferior). - Europe is a continent that comprises the westernmost part of Eurasia. Europe is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, and the Mediterranean Sea to the south. To the east and southeast, Europe is generally considered as separated from Asia by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterways of the Turkish Straits. Yet the non-oceanic borders of Europea concept dating back to classical antiquityare arbitrary. The primarily physiographic term "continent" as applied to Europe also incorporates cultural and political elements whose discontinuities are not always reflected by the continent's current overland boundaries. - The Mlava (Serbian Cyrillic: ) is the river in Serbia, 158 km long right tributary of the Danube. - Pozarevac is a city and the administrative center of the Branievo District in eastern Serbia. It is located between three rivers: Danube, Great Morava and Mlava. In 2011, the city had a population of 44,183 and its municipal area 75,334. - The Volga is the longest river in Europe. It is also Europe's largest river in terms of discharge and watershed. The river flows through central Russia and into the Caspian Sea, and is widely regarded as the national river of Russia. - The Branievo District is one of nine administrative districts of Southern and Eastern Serbia. It expands in the north-eastern parts of Serbia. According to the 2011 census results, it has a population of 180,480 inhabitants. The administrative center of the district is Pozarevac. - The European Union (EU) is a political and economic union of member states that are located primarily in Europe. It has an area of , and an estimated population of over 510 million. The EU has developed an internal single market through a standardised system of laws that apply in all member states. EU policies aim to ensure the free movement of people, goods, services, and capital within the internal market, enact legislation in justice and home affairs, and maintain common policies on trade, agriculture, fisheries, and regional development. Within the Schengen Area, passport controls have been abolished. A monetary union was established in 1999 and came into full force in 2002, and is composed of 19 EU member states which use the euro currency. - Kostolac Airport ( ICAO : LYKT ) is situated on the bank of the Danube river , built in 1998 on the power plant 's reclaimed former ash yard . It is two kilometres from the Kostolac town centre and also near the town of Pozarevac . Landing at Kostolac Airport is unique , because the way of landing is over the Danube water plane , which is similar to landing on an aircraft carrier . There is an international air show every August . The Airport is close to the ancient Roman city of Viminacium . - Kostolac is a town and urban municipality located in the Branievo District of the eastern Serbia, as part of the city of Pozarevac. It is situated on the Danube river. The remains of the Roman capital of the province of Moesia Superior Viminacium are located near Stari Kostolac some 2km to the east of Kostolac. Kostolac town is center of the municipality of Kostolac, which is one of the two municipalities of the City of Pozarevac. Kostolac is also a center of area called Stig and home of thermo-power plants and coal mines. - The Great Morava (Serbian: / "Velika Morava") is the final section of the Morava (Cyrillic: ), a major river system in Serbia. - Viminacium was a major city (provincial capital) and military camp of the Roman province of Moesia (today's Serbia), and the capital of "Moesia Superior". The site is located from the modern town of Kostolac in Eastern Serbia. The city dates back to the 1stcentury AD, and at its peak it is believed to have had 40,000 inhabitants, making it one of the biggest cities of that time. It lies on the Roman road "Via Militaris". Viminacium was devastated by Huns in the 5thcentury, but was later rebuilt by Justinian. It was completely destroyed with the arrival of Slavs in the 6th century. Today, the archaeological site occupies a total of , and contains remains of temples, streets, squares, amphitheatres, palaces, hippodromes and Roman baths. 'kostolac airport' is related to which object entity through the relation of 'country'? Choices: - atlantic ocean - european union - macedonia - russia - serbia
A:
serbia