Complex sentence: In 1894, Pierre Giffard organised what is considered to be the world's first car race from Paris to Rouen, sporting events were a tried and tested form of publicity stunt and circulation booster.
Split into simpler sentences: In 1894, Pierre Giffard organised what is considered to be the world's first car race, from Paris to Rouen. Sporting events were a tried and tested form of publicity stunt and circulation booster.