Question: What is the date of birth of Amelia Stewart, Viscountess Castlereagh's husband?
Sentence (from "Robert Stewart, Viscount Castlereagh"): Robert Stewart, 2nd Marquess of Londonderry, (18 June 1769 – 12 August 1822), usually known as Lord Castlereagh, derived from the courtesy title Viscount Castlereagh  by which he was styled from 1796 to 1821, was an Anglo-Irish statesman.
Relevant evidence: Yes