Complex sentence: In 1929, Izzy Stone married Esther Roisman, who later worked as his assistant at "I. F. Stone's Weekly"; their marriage produced three children (Celia, Jeremy, and Christopher) and after sixty years, ended at his death in 1989.
Split into simpler sentences: In 1929, Izzy Stone married Esther Roisman, who later worked as his assistant at "I. F. Stone's Weekly". Their marriage produced three children (Celia, Jeremy, and Christopher) and after sixty years, ended with his death in 1989.