Complex sentence: Driving an Alfa Romeo, he captured his first 24 hours of Le Mans with Raymond Sommer in 1932 and the following year with Louis Chiron as co-driver, he won the SPA 24 Hours endurance race in Belgium.
Split into simpler sentences: Driving an Alfa Romeo entered by his co-driver Raymond Sommer, he won at his very first 24 hours of Le Mans in. The following year, with Louis Chiron as co-driver, he won the SPA 24 Hours endurance race in Belgium.