Simplify the following text for a Grade 5 native English-speaking person.
Original: The first Formula One race was held in 14 August 1958 in Boavista , followed in 1959 by a Grand Prix at Monsanto , return to Boavista in 1960 , after which it was ended .
Simplified: The first Formula One race was held in 14 August 1958 . The first three F1 races were held in both Boavista and Monsanto .