Question: When did Dorothy Savile, Viscountess Halifax's husband die?
Sentence (from "Dorothy Savile, Viscountess Halifax"): Dorothy Savile, Viscountess Halifax (née Spencer; 1640 – 16 December 1670) was the first wife of George Savile, 1st Viscount Halifax, and the mother of the 2nd Marquess.
Relevant evidence: Yes