Complex sentence: The Dick's Sporting Goods Open is a Champions Tour golf tournament that debuted in July 2007 and supplanted the B.C. Open, a now-defunct PGA Tour event, that was held annually from 1971 to 2006.
Split into simpler sentences: The Dick's Sporting Goods Open is a Champions Tour Event. It debuted in July 2007, supplanting the B.C. Open, a now-defunct PGA Tour event, which was held annually from 1971 to 2006.