Question: What is the date of birth of Amelia Stewart, Viscountess Castlereagh's husband?
Sentence (from "Amelia Stewart, Viscountess Castlereagh"): Well-connected by birth to the aristocracy and wife of a prominent politician who was Britain's leading diplomat during the close of the Napoleonic Wars, Lady Castlereagh was an influential member of Regency London's high society.
Relevant evidence: No