Complex sentence: At age two, McGuinness moved to Korea where she lived with relatives until returning to the States at age five, then moving to Long Island, New York, where she lived with her father's parents.
Split into simpler sentences: At age two, McGuinness moved to Korea where she lived with relatives until age five. Upon returning to the States, McGuinness moved to Long Island, New York where she lived with her father's parents.