Simplify the following text for a Grade 4 native English-speaking person.
Original: William Henry Getty France Sr. ( September 26 , 1909 â `` June 7 , 1992 ) was an American racecar driver , best known for being the co-founder of NASCAR .
Simplified: William Henry Getty France Sr. ( September 26 , 1909 -- June 7 , 1992 ) , also known by Bill France Sr. or Big Bill , was an American race car driver .