Complex sentence: Ursula and Sabina Eriksson, identical twin sisters, left their homeland for different countries, Sabina settling in Mallow, County Cork, Ireland, Ursula settling in the United States.
Split into simpler sentences: Ursula and Sabina Eriksson, identical twin sisters, had left their homeland for different countries. Sabina had settled in Mallow, County Cork, Ireland, and Ursula had settled in the United States.