Complex sentence: The Countess de Portes was born Hélène Rebuffel in 1902 in Marseille, the daughter of, an engineer and director of Société des Grands Travaux de Marseille from 1917 to 1939.
Split into simpler sentences: The Countess de Portes was born Hélène Rebuffel in 1902 in Marseille. She was the daughter of, an engineer and director of Société des Grands Travaux de Marseille from 1917 to 1939.