Title: John Spencer-Churchill, 11th Duke of Marlborough
Content: Justice of the Peace ; Deputy Lieutenant of Oxfordshire 
Title: John Spencer-Churchill, 11th Duke of Marlborough
Content:  John George Vanderbilt Henry Spencer-Churchill, 11th Duke of Marlborough, (13 April 1926 – 16 October 2014) was a British peer. He was the elder son of The 10th Duke of Marlborough and his wife, The Hon. Alexandra Mary Hilda Cadogan. He was known as "Sunny" after his courtesy title of Earl of Sunderland. His principal seat was Blenheim Palace, in Woodstock, Oxfordshire. He was ranked 224th in the Sunday Times Rich List 2004, with an estimated wealth of £185 million. His death was announced on 16 October 2014 by Blenheim Palace.
Title: John Spencer-Churchill, 10th Duke of Marlborough
Content:  John Albert Edward William Spencer-Churchill, 10th Duke of Marlborough, (18 September 1897 – 11 March 1972), styled Marquess of Blandford until 1934, was a British military officer and peer.
Title: John Spencer-Churchill, 7th Duke of Marlborough
Content:  John Spencer-Churchill was born at Garboldisham Hall, Norfolk, the eldest son of George Spencer-Churchill, 6th Duke of Marlborough, and Lady Jane Stewart, daughter of Admiral George Stewart, 8th Earl of Galloway. He was educated at Eton College and Oriel College, Oxford. He commenced his career as a lieutenant in the 1st Battalion Queen's Own Oxfordshire Hussars in 1842.
Title: Duke of Marlborough (title)
Content:  Duke.svg|15px]] Charles Spencer-Churchill, 9th Duke of Marlborough (1871–1934) ; [[Image:Coronet of a British Duke.svg|15px]] John Spencer-Churchill, 10th Duke of Marlborough (1897–1972) ; [[Image:Coronet of a British Duke.svg|15px]] John Spencer-Churchill, 11th Duke of Marlborough (1926–2014) ; [[Image:Coronet of a British Duke.svg|15px]] James Spencer-Churchill, 12th Duke of Marlborough (b. 1955) ; (1) George Spencer-Churchill, Marquess of Blandford (b. 1992) ; (2) Lord Caspar Spencer-Churchill (b. 2008) 2 ; (3) Lord Edward Spencer-Churchill (b. 1974) 2 ; Lord Charles Spencer-Churchill (1940–2016) ; (4) Rupert Spencer-Churchill (b. 1971) 2 ; (5) Dominic Spencer-Churchill (b. 1979) 2 ; (6) Ivor Spencer-Churchill (b. 2014) ; (7) Alexander 
Title: John Spencer-Churchill, 11th Duke of Marlborough
Content:  He was educated at Eton College and served seven years in the Life Guards, in which he achieved the rank of captain. In 1972, on inheriting the Dukedom of Marlborough, he took over the management of Blenheim Palace and the Blenheim estate. To fund the maintenance of the house, he opened it to visitors and as a film set, and established a number of businesses, including a garden furniture company and a water bottling plant. He was also active in a range of organisations, including the Thames and Chilterns Tourist Board and Oxford United Football Club. He served as vice-president of the Witney Conservative Association, the local party of David Cameron.
Title: George Spencer-Churchill, 6th Duke of Marlborough
Content:  George Spencer-Churchill, 6th Duke of Marlborough, DCL (27 December 1793 – 1 July 1857), styled Earl of Sunderland until 1817 and Marquess of Blandford between 1817 and 1840, was a British nobleman, politician, and peer. The great-grandfather of Sir Winston Churchill, he served as Lord-Lieutenant of Oxfordshire between 1842 and 1857.
Title: George Spencer-Churchill, 8th Duke of Marlborough
Content:  Marlborough was born in England on 13 May 1844. He was the eldest son of John Spencer-Churchill, 7th Duke of Marlborough (1822–1883), who served as Lord Lieutenant of Ireland and Lord President of the Council, and Lady Frances Anne Emily Vane (1822–1899). He was the elder brother of Lord Randolph Churchill and the uncle of Winston Churchill. His paternal grandparents were George Spencer-Churchill, 6th Duke of Marlborough, and Lady Jane Stewart, daughter of Admiral George Stewart, 8th Earl of Galloway. His maternal grandparents were Charles Vane, 3rd Marquess of Londonderry and Frances Vane, Marchioness of Londonderry. Like his father before him, he was educated at Eton College, entering in 1857 and being expelled in 1860.
Title: John Spencer-Churchill, 7th Duke of Marlborough
Content:  John Winston Spencer-Churchill, 7th Duke of Marlborough (2 June 1822 – 4 July 1883), styled Earl of Sunderland from 1822 to 1840 and Marquess of Blandford from 1840 to 1857, was a British Conservative cabinet minister, politician, peer, and nobleman. He was the paternal grandfather of Prime Minister Sir Winston Churchill.
Title: George Spencer-Churchill, 5th Duke of Marlborough
Content:  George Spencer-Churchill, 5th Duke of Marlborough FSA (6 March 1766 – 5 March 1840), styled Marquess of Blandford until 1817, was a British nobleman, politician, peer, and collector of antiquities and books. He was the first one to specifically use the surname "Spencer-Churchill"; Churchill was the name of the first Duke.

Question: In what city was John Spencer-Churchill, 11th Duke of Marlborough born?
Answer: Blenheim Palace.