Complex sentence: Colette de Jouvenel, also known as known as Bel-Gazou, 1913-1981, was the daughter of French writer Colette and Henry de Jouvenel.
Split into simpler sentences: Colette de Jouvenel, known as Bel-Gazou, 1913-1981. She was the daughter of French writer Colette and Henry de Jouvenel.