Simplify the following text for a Grade 5 native English-speaking person.
Original: Luigi Fagioli is the oldest winner of a Formula One Grand Prix ; he was 53 years and 22 days old when he won the 1951 French Grand Prix .
Simplified: Luigi Fagioli is the oldest winner of a Formula One Grand Prix . He was 53 years and 22 days old when he won the French Grand Prix .