Complex sentence: When she was four years old, the family moved to Beverly Hills, California, remaining there until she graduated from Beverly Hills High School and moved back East to attend Wellesley College in Wellesley, Massachusetts.
Split into simpler sentences: When she was four years old, the family moved to Beverly Hills, California. She remained there until she graduated from Beverly Hills High School and moved back East to attend Wellesley College in Wellesley, Massachusetts.