Complex sentence: He married Mary, daughter of Robert Hogg, of Kincardine, in Scotland, who died about three years before him, and was buried at Marylebone, the parish in which he lived many years.
Split into simpler sentences: He married Mary, daughter of Robert Hogg, of Kincardine. She died about three years before him, and was buried at Marylebone, the parish in which he lived many years.