Question: What is the place of birth of Susan Spencer-Churchill, Duchess Of Marlborough's mother?

Knowledge 1: Susan Spencer-Churchill, Duchess of Marlborough
Susan Spencer-Churchill, Duchess of Marlborough (10 April 1767 – 2 April 1841), formerly Lady Susan Stewart, was the wife of George Spencer-Churchill, 5th Duke of Marlborough.Lady Susan Stewart was the daughter of John Stewart, 7th Earl of Galloway, and his second wife, the former Anne Dashwood.She married the future duke on 15 September 1791, when he was styled Marquess of Blandford.They were married at her father's house in St James's Square, London, by the Archbishop of Canterbury, John Moore.They had four children:In 1817 the marquess inherited the dukedom from his father, George Spencer, 4th Duke of Marlborough, at which point his wife became Duchess of Marlborough.The duchess died at her house in Park Lane, London, aged 73.In the previous year two of her sons, Charles and Henry John, had died, along with Charles's wife and her husband the duke himself.She was buried in the chapel of Blenheim Palace. [SEP] Knowledge 2: Anne Stewart, Countess of Galloway
Anne Stewart, Countess of Galloway (1743 – 8 January 1830), formerly Anne Dashwood, was the wife of John Stewart, 7th Earl of Galloway.Anne Dashwood was born at Kirtlington Park, Oxfordshire, the family home of her parents Sir James Dashwood, 2nd Baronet, and his wife, the former Elizabeth Spencer.On 13 June 1764, she married the future earl, when he was an MP and heir to his father's earldom.His first wife, Lady Charlotte Greville, had died in 1763, leaving him with no living children.In the year of their marriage, Sir Joshua Reynolds painted Anne in the guise of a shepherdess; the portrait is now held by the Metropolitan Museum of Art, New York.They had sixteen children:
John Stewart inherited the earldom of Galloway in 1773, making his wife a countess.He died in 1806, at which point she became Dowager Countess of Galloway.Two years later, a court case ensued over a trust deed set up by the earl in 1804, whereby the trustees were authorised to sell property and appoint additional trustees.The dowager countess having declined to accept nomination as a trustee, a Mr Forbes, who had purchased part of the estate, took the trustees to the Court of Session, claiming he was not bound by the terms of the purchase; the Court of Session found against him.The countess died, aged 86, at Davies Street, Westminster, London.
Knowledge 1: Susan Spencer-Churchill, Duchess of Marlborough
Susan Spencer-Churchill, Duchess of Marlborough (10 April 1767 – 2 April 1841), formerly Lady Susan Stewart, was the wife of George Spencer-Churchill, 5th Duke of Marlborough.Lady Susan Stewart was the daughter of John Stewart, 7th Earl of Galloway, and his second wife, the former Anne Dashwood.She married the future duke on 15 September 1791, when he was styled Marquess of Blandford.They were married at her father's house in St James's Square, London, by the Archbishop of Canterbury, John Moore.They had four children:In 1817 the marquess inherited the dukedom from his father, George Spencer, 4th Duke of Marlborough, at which point his wife became Duchess of Marlborough.The duchess died at her house in Park Lane, London, aged 73.In the previous year two of her sons, Charles and Henry John, had died, along with Charles's wife and her husband the duke himself.She was buried in the chapel of Blenheim Palace. [SEP] Knowledge 2: Consuelo Vanderbilt
Consuelo Vanderbilt Balsan (formerly Consuelo Spencer-Churchill, Duchess of Marlborough; born Consuelo Vanderbilt; 2 March 1877 – 6 December 1964) was a member of the prominent American Vanderbilt family.Her marriage to The 9th Duke of Marlborough has become an emblem of the socially advantageous, but loveless, marriages common during the Gilded Age.
Knowledge 1: Anne Stewart, Countess of Galloway
Anne Stewart, Countess of Galloway (1743 – 8 January 1830), formerly Anne Dashwood, was the wife of John Stewart, 7th Earl of Galloway.Anne Dashwood was born at Kirtlington Park, Oxfordshire, the family home of her parents Sir James Dashwood, 2nd Baronet, and his wife, the former Elizabeth Spencer.On 13 June 1764, she married the future earl, when he was an MP and heir to his father's earldom.His first wife, Lady Charlotte Greville, had died in 1763, leaving him with no living children.In the year of their marriage, Sir Joshua Reynolds painted Anne in the guise of a shepherdess; the portrait is now held by the Metropolitan Museum of Art, New York.They had sixteen children:
John Stewart inherited the earldom of Galloway in 1773, making his wife a countess.He died in 1806, at which point she became Dowager Countess of Galloway.Two years later, a court case ensued over a trust deed set up by the earl in 1804, whereby the trustees were authorised to sell property and appoint additional trustees.The dowager countess having declined to accept nomination as a trustee, a Mr Forbes, who had purchased part of the estate, took the trustees to the Court of Session, claiming he was not bound by the terms of the purchase; the Court of Session found against him.The countess died, aged 86, at Davies Street, Westminster, London. [SEP] Knowledge 2: Consuelo Vanderbilt
Consuelo Vanderbilt Balsan (formerly Consuelo Spencer-Churchill, Duchess of Marlborough; born Consuelo Vanderbilt; 2 March 1877 – 6 December 1964) was a member of the prominent American Vanderbilt family.Her marriage to The 9th Duke of Marlborough has become an emblem of the socially advantageous, but loveless, marriages common during the Gilded Age.

Answer: Oxfordshire