Question: What is the date of birth of Amelia Stewart, Viscountess Castlereagh's husband?
Sentence (from "Amelia Stewart, Viscountess Castlereagh"): Amelia Anne "Emily" Stewart, Marchioness of Londonderry (20 February 1772 – 12 February 1829), from 1794 until 1821 generally known as Lady Castlereagh , was the wife of the Georgian-era Irish statesman Robert Stewart, Viscount Castlereagh, who from 1812 to 1822 was British Foreign Secretary and Leader of the House of Commons.
Relevant evidence: Yes