Complex sentence: Feeling called to religious life, she rejected a marriage arranged by her father, and became a Dominican tertiary at 17; she waited 37 years to complete her vows so she could care for her brothers and sisters after the death of her parents.
Split into simpler sentences: Feeling called to religious life, she rejected a marriage arranged by her father, and became a Dominican tertiary at 17. She waited 37 years to complete her vows so she could care for her brothers and sisters after the death of her parents.