Complex sentence: Coburn was born in Laurel, Nebraska, the son of Mylet S. (née Johnson) and James Harrison Coburn, Jr., who had a garage business that was wiped out by the Great Depression.
Split into simpler sentences: Coburn was born in Laurel, Nebraska, the son of James, Jr. and Mylet S. (née Johnson) Coburn. His father had a garage business that was wiped out by the Great Depression.