Complex sentence: The Rockabilly Hall of Fame reported in summer 2009 that Riley was in poor health, battling stage 4 colon cancer, which caused his death on August 2,2009 in Jonesboro, Arkansas.
Split into simpler sentences: The Rockabilly Hall of Fame reported in summer 2009 that Riley was in poor health, battling stage 4 colon cancer. He succumbed to colon cancer on August 2,2009 in Jonesboro, Arkansas.