Simplify the following text for a Grade 7 native English-speaking person.
Original: To date , he remains the only driver ever to win the Indianapolis 500 ( 1969 ) , Daytona 500 ( 1967 ) and the Formula One World Championship , and , along with Juan Pablo Montoya , the only driver to have won a race in the NASCAR Sprint Cup Series , Formula One , and an Indianapolis 500 . No American has won a Formula One race since Andretti 's victory at the 1978 Dutch Grand Prix .
Simplified: He won the 1978 Formula One championship and won the 1967 Daytona 500 .