Question: Who did the grandson of the Earl of Sunderland (from 1822-1840) marry?
Sentence (from "John Spencer-Churchill, 7th Duke of Marlborough"): John Winston Spencer-Churchill, 7th Duke of Marlborough (2 June 1822 – 4 July 1883), styled Earl of Sunderland from 1822 to 1840 and Marquess of Blandford from 1840 to 1857, was a British Conservative cabinet minister, politician, and nobleman.
Relevant evidence: Yes