Complex sentence: She married Dr. Christopher C. Yates in 1838 moved with him to Boston, but who gave up his career, after nine-months of marriage they separated and a decree Nisi was granted in 1843.
Split into simpler sentences: She married Dr. Christopher C. Yates in 1838 and moved with him to Boston. He gave up his career, and after nine-months of marriage they separated and a decree Nisi was granted in 1843.