Claim: 1951 Syracuse Grand Prix had more than five drivers, one of whom is Dorino Serafini .
Evidence: Italy Luigi Villoresi Italy Dorino Serafini Switzerland Rudi Fischer France Henri Louveau France Louis Rosier Italy Alberto Ascari Switzerland Pierre Staechelin Italy Nino Farina United_States Harry Schell Thailand Prince Bira Italy Ferdinando Righetti Italy Giovanni Bracco