Question: Lady Amelia Spencer is the daughter of a British nobleman born in which year ?
Context: Walter John Francis Montagu Douglas Scott, Earl of Dalkeith (born 2 August 1984) is a British nobleman.  He is the second child and elder son of Richard Montagu Douglas Scott, 10th Duke of Buccleuch & 12th Duke of Queensberry, and Lady Elizabeth Kerr, a daughter of Peter Kerr, 12th Marquess of Lothian and Antonella Reuss Newland.  He is heir apparent to the Dukedoms of Buccleuch and Queensberry. Hon. John Spencer (13 May 1708 – 19 June 1746) was a British nobleman and politician.  He was an ancestor of the Earls Spencer. James Hamilton, 2nd Duke of Abercorn (24 August 1838 – 3 January 1913), styled Viscount Hamilton until 1868 and Marquess of Hamilton from 1868 to 1885, was a British nobleman and diplomat.  He was the son of James Hamilton, 1st Duke of Abercorn, and Lady Louisa Jane Russell. The Lady Eliza Victoria Spencer (born 10 July 1992) is the second daughter of Charles Spencer, 9th Earl Spencer and his first wife, Victoria Lockwood.  She is a niece of Diana, Princess of Wales, and a cousin of Prince William, Duke of Cambridge and Prince Harry.  She and Lady Amelia Spencer are twins. Spencer Joshua Alwyne Compton, 2nd Marquess of Northampton (2 January 1790 – 17 January 1851), known as Lord Compton from 1796 to 1812 and as Earl Compton from 1812 to 1828, was a British nobleman and patron of science and the arts. William Cavendish, 2nd Duke of Devonshire {'1': ", '2': ", '3': ", '4': "} (1672 – 4 June 1729) was a British nobleman and politician.  He was the eldest son of William Cavendish, 1st Duke of Devonshire and Lady Mary Butler.  A prominent Whig, he was sworn of the Privy Council in 1707, and served as Lord President of the Council from 1716 to 1717 and 1725 to 1729.  He married The Hon. Rachel Russell (1674–1725), daughter of William Russell, Lord Russell on 21 June 1688. Charles Edward Maurice Spencer, 9th Earl Spencer, (born 20 May 1964), styled Viscount Althorp between 1975 and 1992, is a British nobleman, peer, author, print journalist, and broadcaster, and was the younger brother of Diana, Princess of Wales.  Through his sister, Spencer is the maternal uncle of Prince William, Duke of Cambridge and Prince Harry. The Lady Katya Amelia Spencer (born 10 July 1992) is the third daughter of Charles Spencer, 9th Earl Spencer and his first wife, Victoria Lockwood.  She is a niece of Diana, Princess of Wales.  She is the twin of Lady Eliza Spencer. Henry Lowther, 3rd Earl of Lonsdale (27 March 1818 – 15 August 1876) was a British nobleman and Conservative politician, the eldest son of Hon Henry Cecil Lowther and Lady Lucy Sherard.  His paternal grandfather was William Lowther, 1st Earl of Lonsdale and his maternal grandfather was Philip Sherard, 5th Earl of Harborough. James Hamilton, 5th Duke of Abercorn, {'1': ", '2': ", '3': ", '4': "} (born 4 July 1934) is a British nobleman, peer, and politician.  He became Duke of Abercorn in the Peerage of Ireland on the death of his father in June 1979.  He was the son of James Edward Hamilton, 4th Duke of Abercorn, and Lady Mary Crichton (daughter of Lt.-Col.  Henry William Crichton, Viscount Crichton (1872–1914), eldest son of John Crichton, 4th Earl Erne).  He is a former politician and Lord Steward of the Household.
Answer: 1964