Complex sentence: Marina Vlady is the sister of actresses Odile Versois, Hélène Vallier and Olga Baïdar-Poliakoff; her father was a noted artist of Russian heritage.
Split into simpler sentences: Marina Vlady is the sister of actresses Odile Versois, Hélène Vallier and Olga Baïdar-Poliakoff. Their father was a noted artist of Russian heritage.