Complex sentence: He is chiefly known for his optimistic attempt to enter the 1976 Formula One Austrian Grand Prix with the local ÖASC Racing Team, driving a March 761, despite having little or no experience in single seater racing cars.
Split into simpler sentences: He is chiefly known for his optimistic attempt to enter the 1976 Formula One Austrian Grand Prix. In 1976, Oppitzhauser attempted to enter the Austrian Grand Prix with the local ÖASC Racing Team, driving a March 761, despite having little experience in single seater racing cars.