Complex sentence: The 2013 United States Open Championship was the 113th U.S. Open, held June 13--16 at the East Course of Merion Golf Club in Ardmore, Pennsylvania, west of Philadelphia.
Split into simpler sentences: The 2013 United States Open Championship was the 113th edition of the U.S. Open. It took place June 13--16 at the East Course of the Merion Golf Club in Ardmore, Pennsylvania, west of Philadelphia.