Statistics for Drivers Who Have Competed in All Three Major Circuits

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Hint	Answer	% Correct
Brazilian driver, son of Emerson(I think)	Christian Fittipaldi	100%
Canadian driver, 1995 Indy 500 winner and 1997 F1 World Champion	Jacques Villeneuve	100%
Danish driver, father of Kevin	Jan Magnussen	100%
American driver, 1978 F1 World Champion	Mario Andretti	100%
Colombian driver, three Indy 500 wins	Juan Pablo Montoya	80%
British driver, two-time F1 World Champion and 1965 Indy 500 winner	Jim Clark	60%
American driver(Sorry for the lack of clues but IDK if he's done anything significant)	Scott Speed	60%
American driver, father of Graham	Bobby Rahal	40%
American driver, 4 F1 wins	Dan Gurney	40%
American driver, 1986 Indy 500 winner	Bobby Unser	20%