Complex sentence: Shortly after the release of "I Forgot More Than You'll Ever Know", The Davis Sisters were in a car accident on August 2,1953, which killed Betty Jack instantly and seriously injured Skeeter.
Split into simpler sentences: Shortly after the release of "I Forgot More Than You'll Ever Know", tragedy struck The Davis Sisters. They were in a car accident on August 2,1953, which killed Betty Jack instantly and seriously injured Skeeter.