Complex sentence: In 1935, Julia Diament married Jean Pirotte, a labor activist in Brussels who was killed in World War II. She moved to Marseilles in 1942 and joined the French Resistance.
Split into simpler sentences: In 1935, Julia Diament married Jean Pirotte, labor activist in Brussels. He was killed in World War II. In 1942 she moved to Marseilles and joined the French Resistance.