Title: Buenos Aires
Content:  Buenos Aires ( or ; ), officially the Autonomous City of Buenos Aires (Ciudad Autónoma de Buenos Aires), is the capital and largest city of Argentina. The city is located on the western shore of the Río de la Plata, on South America's southeastern coast. "Buenos Aires" can be translated as "fair winds" or "good airs", but the former was the meaning intended by the founders in the 16th century, by the use of the original name "Real de Nuestra Señora Santa María del Buen Ayre", named after the Madonna of Bonaria in Sardinia, Italy. The city of Buenos Aires is neither part of 
Title: Puerto Rico, Argentina
Content:  Puerto Rico is the capital city of Libertador General San Martín, in the Misiones Province of Argentina.  It is located at 26° 48' south latitude and 55° 01' west longitude, along the Paraná River. It limits to the south with the city of Capioví, at east and north with the Garuhapé and to the east west with Paraguay. Strategically located along Route 12, it is half way between the Iguazu Falls and the province's capital Posadas. With almost 12.500 hectares, the city has a population of around 20.000 people, mainly composed of European immigrants.
Title: La Capital
Content:   La Capital is a daily Spanish-language newspaper edited and published in Rosario, province of Santa Fe, Argentina. It was founded on November 15, 1867, and it is the oldest Argentine newspaper still in circulation, which has gained it the title of Decano de la Prensa Argentina ("Dean of the Argentine Press"). The name was chosen by its founder, Ovidio Lagos, as a political statement on the part of those, including him, who were lobbying to move the capital of the federal government to Rosario. Rosario was in fact declared the capital three times by Congress, only to face presidential vetoes each time. At the time of its foundation, La Capital was an afternoon newspaper. Newspapers were just forums of political debate with classified ads. Since the beginning, the heading of La 
Title: List of cities in Argentina
Content: Corrientes (Capital) ; Alvear ; Bella Vista ; Curuzú Cuatiá ; Empedrado ; Esquina ; Gobernador Virasoro ; Goya ; Itatí ; Ituzaingó ; Paso de los Libres ; Santo Tomé ; Saladas ; Santa Lucía ; Sauce 
Title: Buenos Aires Province
Content:  Buenos Aires, officially the Buenos Aires Province (Provincia de Buenos Aires ), is the largest and most populous Argentine province. It takes its name from the city of Buenos Aires, the capital of the country, which used to be part of the province and the province's capital until it was federalized in 1880. Since then, in spite of bearing the same name, the province does not include Buenos Aires proper, though it does include all other parts of the Greater Buenos Aires metropolitan area. The capital of the province is the city of La Plata, founded in 1882. The province is the only one within Argentina to be divided into partidos and further into localidades (the other provinces have departamentos). It borders 
Title: Provinces of Argentina
Content:  Argentina is subdivided into twenty-three provinces (provincias singular provincia) and the autonomous city (ciudad autónoma) of Buenos Aires, which is the federal capital of the nation (Capital Federal) as decided by the Argentine Congress. The provinces and the capital have their own constitutions, but exist under a federal system.
Title: Argentina
Content:  The country had 5.57 million visitors in 2013, ranking in terms of the international tourist arrivals as the top destination in South America, and second in Latin America after Mexico. Revenues from international tourists reached US$4.41 billion in 2013, down from US$4.89 billion in 2012. The country's capital city, Buenos Aires, is the most visited city in South America. There are 30 National Parks of Argentina including many World Heritage Sites.
Title: Buenos Aires–Rosario–Córdoba high-speed railway
Content:   Buenos Aires and its metropolitan area has a population of more than 13 million, almost one third of the national total. It is the economic and political center of Argentina, and its main international entry point. Rosario, located about 310 km north-northwest of the capital, is the third-largest city and a major port, with a metropolitan population of 1.3 million. It is part of the agricultural and industrial core of the littoral region. Córdoba, with a population around 1.4 million, is located about 710 km from Buenos Aires, near the geographical center of Argentina. It is the second most populated metropolitan area, and a cultural, touristic, and industrial center. Altogether, the three cities include 15 million inhabitants, or more than a third of the country's overall 
Title: La Rioja, Argentina
Content:  La Rioja is the capital and largest city of the Argentine province of La Rioja, located in the east of the province. La Rioja is located on the foot of the Velasco Sierras, 1167 km from Buenos Aires, and 430 km from Córdoba.
Title: Santiago del Estero
Content:  Santiago del Estero (, Spanish for Saint-James-Upon-The-Lagoon) is the capital of Santiago del Estero Province in northern Argentina. It has a population of 252,192 inhabitants, making it the twelfth largest city in the country, with a surface area of 2,116 km². It lies on the Dulce River and on National Route 9, at a distance of 1,042 km north-northwest from Buenos Aires. Estimated to be 455 years old, Santiago del Estero was the first city founded by Spanish settlers in the territory that is now Argentina. As such, it is nicknamed "Madre de Ciudades" (Mother of Cities). Similarly, it has been officially declared the "mother of cities and cradle of folklore." The city houses the National University of Santiago del 

Question: What is the capital of Argentina?
Answer: Buenos Aires.
Buenos Ayres.
Autonomous City of Buenos Aires.
CABA.
Ciudad Autónoma de Buenos Aires.