Complex sentence: Raymond Albert "Ray" Kroc (October 5,1902--January 14,1984) was an American businessman who joined McDonald's in 1954 and built it into the most successful fast food operation in the world.
Split into simpler sentences: Raymond Albert "Ray" Kroc (October 5,1902--January 14,1984) was an American businessman. He joined McDonald's in 1954 and built it into the most successful fast food operation in the world.