Complex sentence: Ahmet Ertegün (-- December 14,2006) was the Turkish founder and president of Atlantic Records, writer of classic blues, pop songs, and served as Chairman of the Rock and Roll Hall of Fame and museum.
Split into simpler sentences: Ahmet Ertegün (-- December 14,2006) was the Turkish founder and president of Atlantic Records. He was also a writer of classic blues, pop songs, and served as Chairman of the Rock and Roll Hall of Fame and museum.