Complex sentence: The 1984 U.S. Open was the 84th U.S. Open, held June 14--18 at Winged Foot Golf Club in Mamaroneck, New York, a suburb northeast of New York City.
Split into simpler sentences: The 1984 U.S. Open was the 84th U.S. Open. The golf tournament was held June 14--18,1984, at Winged Foot Golf Club in Mamaroneck, New York, a suburb northeast of New York City.