Complex sentence: Amos (1631--1685) married first on 13 July 1667 Sarah Stafford, the daughter of Thomas and Elizabeth Stafford and married second on 9 June 1670 Deborah Stafford, the sister of Sarah.
Split into simpler sentences: Amos (1631--1685) married Sarah Stafford on 13 July 1667, the daughter of Thomas and Elizabeth Stafford. He married Deborah Stafford on 9 June 1670, the sister of Sarah.