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?
Sentence (from "Club Atlético River Plate"): 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.
Relevant evidence: No