Complex sentence: John "Jack" Spoor Broome (December 1,1917, Chicago, Illinois-April 10,2009), born into a successful ranching family, became an aviator and philanthropist.
Split into simpler sentences: John "Jack" Spoor Broome (December 1,1917,-April 10,2009), was born in Chicago, IL. He was born into a successful ranching family, became an aviator and philanthropist.