Complex sentence: The Presidents Cup is a series of men's golf matches between a United States team and an International Team representing the rest of the world less Europe, which competes against the U.S. in a similar but considerably older event, the Ryder Cup.
Split into simpler sentences: The Presidents Cup is a series of men's golf matches between a United States team and an International Team representing the rest of the world less Europe. Europe competes against the U.S. in a similar but considerably older event, the Ryder Cup.