Complex sentence: The 1972 U.S. Open was the 72nd U.S. Open, held June 15--18 at Pebble Beach Golf Links in Pebble Beach, California.
Split into simpler sentences: The 1972 U.S. Open was the 72nd U.S. Open. The golf tournament was held June 15--18,1972, at Pebble Beach Golf Links in Pebble Beach, California.