Complex sentence: Richard Alf (January 26,1952--January 4,2012) was an American businessman and former comic book store owner who co-founded the San Diego Comic-Con International and served as its chairman beginning in 1970.
Split into simpler sentences: Richard Alf (January 26,1952--January 4,2012) was an American businessman and former comic book store owner. Alf became the co-founder and chairman of the San Diego Comic-Con International beginning in 1970.