Complex sentence: Her older sister, Sally, was a property master, set designer and subsequently a fashion designer, while her younger sister, Cressida Campbell, an artist, and her older brother, Patrick, a solar engineer at the University of New South Wales.
Split into simpler sentences: Her older sister, Sally, was a property master, set designer and subsequently a fashion designer. Her younger sister, Cressida Campbell, an artist, and her older brother, Patrick, a solar engineer at the University of New South Wales.