Complex sentence: On September 30,1689, an Indian attack killed her grandparents, aunts, uncles and most of her cousins; as a result the 14-year-old Mercy was placed as a servant in the household of Rev. Burroughs.
Split into simpler sentences: On September 30,1689, an Indian attack killed her grandparents, aunts, uncles and most of her cousins. As a result the 14-year-old Mercy was placed as a servant in the household of Rev. Burroughs.