Complex sentence: Marie ("Maria") du Fresnay, née Daminois, was the French writer Honoré de Balzac's mistress and gave him a daughter, Marie-Caroline du Fresnay (b. June 4,1834).
Split into simpler sentences: Marie ("Maria") du Fresnay, née Daminois, was a writer and Honoré de Balzac's mistress. She gave him a daughter, Marie-Caroline du Fresnay (b. June 4,1834).