Complex sentence: Pierre Étienne Théodore Rousseau (April 15,1812--December 22,1867), French painter of the Barbizon school, was born in Paris, of a bourgeois family.
Split into simpler sentences: Pierre Étienne Théodore Rousseau (April 15,1812--December 22,1867), French painter of the Barbizon school. He was born in Paris, of a bourgeois family.