Question: The 1957 1000 km Buenos Aires took place on 20 January, on the Circuito de la Costanera Norte, for this event, was moved from its previous venue, the Autódromo Municipal-Avenida Paz, a 45,000 capacity motor racing circuit in Buenos Aires, Argentina built in which year?
Sentence (from "Autódromo Juan y Oscar Gálvez"): It was later renamed after Argentinian racing driver brothers, Juan Gálvez and Oscar Alfredo Gálvez.
Relevant evidence: No