Complex sentence: The Quicken Loans National (from 2007 to 2013: AT&T National) is a professional golf tournament on the PGA Tour in the Washington D.C. area, held either during late June or during the Fourth of July weekend.
Split into simpler sentences: The Quicken Loans National is a professional golf tournament on the PGA Tour in the Washington D.C. area. It was played from 2007 to 2013 as the AT&T National and is held either during late June or during the Fourth of July weekend.