premise: The Argentine Grand Prix (Spanish: "Gran Premio de Argentina") was a round of the Formula One championship, held intermittently from to , all at the same autodrome in the Argentine national capital of Buenos Aires. Argentine president Juan Perón was the driving force behind the creation of the circuit, after seeing the success of the country's own Juan Manuel Fangio.
hypothesis: Juan Peron was impressed with Fangio's successful career.
reason: After seeing Fangio's success in racing Peron was the driving force behind creating the Argentine Grand Prix circuit.