Simplify the following text for a Grade 4 native English-speaking person.
Original: It was granted entry as Manor Grand Prix on 12 June 2009 , as one of four new teams selected to race in the 2010 season .
Simplified: They were allowed to join F1 as Manor Grand Prix on 12 June 2009 . They were one of four new teams selected to race in the 2010 season .