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 "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.
Relevant evidence: Yes