Complex sentence: The 1947 U.S. Open was the 47th U.S. Open, held June 12--15 at St. Louis Country Club in Ladue, Missouri, a suburb west of St. Louis.
Split into simpler sentences: The 1947 U.S. Open was the 47th U.S. Open. The golf tournament was held June 12--15,1947, at St. Louis Country Club in Ladue, Missouri, a suburb west of St. Louis.