Complex sentence: The 1965 U.S. Open was the 65th U.S. Open, held June 17--21 at Bellerive Country Club in Town and Country, Missouri, a suburb west of St. Louis.
Split into simpler sentences: The 1965 U.S. Open was the 65th U.S. Open. The golf tournament was held June 17--21,1965, at Bellerive Country Club in Town and Country, Missouri, a suburb west of St. Louis.