Complex sentence: Dotson suffered a heart attack in 1997, and a resulting stroke and complications from diabetes took their toll so that, by 2014, the Houston Blues Society held a benefit event to help offset his medical bills.
Split into simpler sentences: Dotson suffered a heart attack in 1997, and a resulting stroke and complications from diabetes took their toll. In 2014, the Houston Blues Society held a benefit event to help offset his medical bills.