Complex sentence: The French Jean Behra won in 1954, before a record crowd on a Simca-Gordini as a result of a duel with Ferrari driver Maurice Trintignant while many French manufacturers were no longer present at the GP.
Split into simpler sentences: The French Jean Behra won in 1954, before a record crowd, driving a Simca-Gordini. His win was a result of a duel with Ferrari driver Maurice Trintignant while many French manufacturers were no longer present at the GP.