Complex sentence: Trintignant has suffered the loss of two of her three children; in 1970, her nine-month-old daughter Pauline died of crib death, and in 2003 her older daughter Marie died from injuries inflicted by her boyfriend, French musician Bertrand Cantat.
Split into simpler sentences: Trintignant has suffered the loss of two of her three children. In 1970, her nine-month-old daughter Pauline died of crib death, and in 2003, her older daughter Marie died from injuries inflicted by her boyfriend, French musician Bertrand Cantat.