Question: Félix Loustau (] ) (25 December 1922 – 5 January 2003) is a former Argentine footballer who was a key player on which  Argentine sports club based in the Belgrano neighborhood of Buenos Aires, and named after the city's estuary, Río de la Plata?

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Palermo, Buenos Aires: Palermo is a neighborhood, or "barrio" of the Argentine capital, Buenos Aires.  It is located in the northeast of the city, bordering the barrios of Belgrano to the north, Almagro and Recoleta to the south, Villa Crespo and Colegiales to the west and the Río de la Plata river to the east.  With a total area of 17.4 km2 , Palermo is the largest neighborhood in Buenos Aires.  As of 1991 it had a population of 256,927 inhabitants (1991 census ).  It is the only "barrio" within the administrative division of "Comuna" 14.

Club de Gimnasia y Esgrima La Plata: Club de Gimnasia y Esgrima La Plata (] (English: La Plata Gymnastics and Fencing Club ), also known simply as Gimnasia or the acronym GELP, is a professional Argentine sports club based in the city of La Plata, Buenos Aires Province.  Founded in 1887 as "Club de Gimnasia y Esgrima", the club is mostly known for its football team, which currently plays in the "Primera División", the first division of the Argentine football league system.

Matanza River: The Matanza River is known by several names, including, in Spanish, Río de la Matanza ("the slaughter river" in English), Río Matanza ("slaughter river"), Río Mataderos ("slaughterhouses river"), Río de la Manzana ("the apple river") or simply Riachuelo ("little river" or "brook").  It is a 64 km stream in Argentina that originates in the Buenos Aires Province and defines the southern boundary of the Buenos Aires federal district.  It empties into the Río de la Plata between Tandanor and Dock Sud.  The La Boca neighbourhood and the Boca Juniors football club are located near the Riachuelo's mouth.  The Spanish word "boca" means "mouth".

Félix Loustau: Félix Loustau (] ) (25 December 1922 – 5 January 2003) is a former Argentine footballer who was a key player on the River Plate squad known as La Máquina.  La Maquina is considered to be one of the greatest team ever assembled in the history of South American football.  They dominated Argentine football during the first half of the 1940s, winning eight national titles during his time at the club.  The five forwards on the team were Juan Carlos Muñoz, José Manuel Moreno, Adolfo Pedernera, Ángel Labruna and Loustau.  He usually played as an outside left and he is considered to be one of Argentina's greatest wingers.

Royal Audiencia of Buenos Aires: The Real Audiencia de Buenos Aires, were two "audiencias", or highest courts, of the Spanish crown, which resided in Buenos Aires.  The authority of the first extended to the territory of the Governorate of the Río de la Plata and operated from 1661 to 1671.  The second began to function in 1783 and had as its territory the areas of the Viceroyalty of the Río de la Plata not covered by the Audiencia de Charcas, that is to say the intendancies of Buenos Aires, Córdoba del Tucumán, Salta del Tucumán and Paraguay.  In 1810, after the May Revolution, it was suspended, and in 1813 the Assembly of the Year XIII permanently disbanded it.  The Audiencias resided in the city's "cabildo" building.

United Provinces of the Rio de la Plata: The United Provinces of the Río de la Plata (Spanish: "Provincias Unidas del Río de la Plata" ), earlier known as the United Provinces of South America (Spanish: "Provincias Unidas de Sudamérica" ), a union of provinces in the Río de la Plata region of South America, emerged from the May Revolution in 1810 and the Argentine War of Independence of 1810–1818.  It comprised most of the former Viceroyalty of the Río de la Plata dependencies and had Buenos Aires as its capital.

Buenos Aires: Buenos Aires ( or ; ] ) is the capital and most populous city of Argentina.  The city is located on the western shore of the estuary of the Río de la Plata, on the South American continent's southeastern coast.  "Buenos aires" can be translated as "fair winds" or "good airs", but the first one 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".  The Greater Buenos Aires conurbation, which also includes several Buenos Aires Province districts, constitutes the fourth-most populous metropolitan area in the Americas, with a population of around 17 million.

Club Atlético River Plate: Club Atlético River Plate is an Argentine sports club based in the Belgrano neighborhood of Buenos Aires, and named after the city's estuary, Río de la Plata.  Although many sports are practiced at the club, River is best known for its professional football team, which has won the most domestic competitions in Argentina with 36 league titles in the top division, 2 second division championships and 9 national cups.  At international level, River Plate has won a total of 16 official titles.

Telégrafo Mercantil: The "Telégrafo Mercantil, Rural, Político, Económico e Historiográfico del Río de la Plata" (in Spanish, "Merchant, rural, political, economic and historiographic telegraph of the Río de la Plata") was the first newspaper edited in Buenos Aires.  It was founded on 1 April 1801 by Francisco Cabello y Mesa and Manuel Belgrano, and approved by viceroy Avilés.

Manuel Alberti: Manuel Máximiliano Alberti (28 May 1763 – 31 January 1811) was a priest from Buenos Aires, when the city was part of the Viceroyalty of the Río de la Plata.  He had a curacy at Maldonado, Uruguay during the British invasions of the Río de la Plata, and returned to Buenos Aires in time to take part in the May Revolution of 1810.  He was chosen as one of the seven members of the Primera Junta, which is considered the first national government of Argentina.  He supported most of the proposals of Mariano Moreno and worked at the "Gazeta de Buenos Ayres" newspaper.  The internal disputes of the Junta had a negative effect on his health, and he died of a heart attack in 1811.

Supporting paragraphs: Félix Loustau Club Atlético River Plate
Answer: Club Atlético River Plate