Complex sentence: On December 29,1955, Houtteman's first son, Jeff, was born with assistance from National Football League player Leon Hart, who was visiting Houtteman and helped deliver the baby.
Split into simpler sentences: On December 29,1955, Houtteman's first son, Jeff, was born. He was born with assistance from National Football League player Leon Hart, who was visiting Houtteman and ended up helping to deliver the baby.