instruction:
In this task, you're given a passage, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both passage and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the passage or linked information.
question:
Passage: Harold Henry Joachim was born in London, the son of a wool merchant who had come to England as a boy from Hungary. He was educated at Harrow School and Balliol College, Oxford, where he was a pupil of R. L. Nettleship. He was elected to a Prize Fellowship at Merton College in 1890, and in 1892 became a philosophy lecturer at the University of St Andrews. Returning to Oxford in 1894, he was lecturer at Balliol until becoming a Fellow and Tutor at Merton in 1897. In 1907 he married his first cousin, a daughter of the violinist Joseph Joachim. He became Wykeham Professor of Logic of the University of Oxford from 1919, succeeding the realist John Cook Wilson, and occupied the chair until his death. Whilst at Oxford he taught the American poet T.S. Eliot. Joachim was a nephew of the great 19th Century violinist Joseph Joachim, and was himself a talented amateur violinist.
 Link Information:  Its foundation can be traced back to the 1260s when Walter de Merton Answer: 1260s 
answer:
When was the university where Joachim  was elected to a Prize Fellowship founded?


question:
Passage: Born in Lambeth, South London, to a working-class family, Livingstone joined Labour in 1968 and was elected to represent Norwood at the GLC in 1973, Hackney North and Stoke Newington in 1977, and Paddington in 1981. That year, Labour representatives on the GLC elected him as the council's leader. Attempting to reduce London Underground fares, his plans were challenged in court and declared unlawful; more successful were his schemes to benefit women and underprivileged minorities, despite stiff opposition. The mainstream media gave him the moniker "Red Ken" in reference to his socialist beliefs and heavily criticised him for supporting controversial issues like republicanism, LGBT rights, and a United Ireland. Livingstone was a vocal opponent of the Conservative Party government of Prime Minister Margaret Thatcher, which in 1986 abolished the GLC. Elected as MP for Brent East in 1987, he became closely associated with anti-racist campaigns. He unsuccessfully stood for Labour Party leader on a leftist platform in 1992 and 1994, in the latter losing to Tony Blair. Livingstone became a vocal critic of Blair's New Labour project that pushed the party closer to the centre and won the 1997 general election.
 Link Information: Margaret Hilda Thatcher, Baroness Thatcher, (; 13 October 19258 April 2013)  Answer: 61
answer:
How old was Margaret Thatcher the year that she abolished the GLC?


question:
Passage: Lady Katherine Neville was born in 1442, one of the ten children and the fifth eldest daughter of Richard Neville, 5th Earl of Salisbury and Alice Montacute, suo jure 5th Countess of Salisbury. Her mother was the only child and heiress of Thomas Montacute, 4th Earl of Salisbury by his first wife Lady Eleanor Holland. Katherine's eldest brother was Richard Neville, 16th Earl of Warwick, 6th Earl of Salisbury, also known as "Warwick the Kingmaker". He was the most important and influential peer in the realm, and one of the principal protagonists in the Wars of the Roses. Her aunt, Cecily Neville, Duchess of York, mother of future kings and Katherine's first cousins, Edward IV and Richard III, was another key figure in the dynastic civil wars that dominated most of the latter half of 15th century England. Her niece, Anne Neville (youngest daughter of the "Kingmaker") would become Queen of England as the consort of Richard III; Katherine's sister Alice, Baroness FitzHugh, and her other niece, Elizabeth FitzHugh, were personally selected as Anne's chief ladies-in-waiting. Her paternal grandparents were Ralph Neville, 1st Earl of Westmorland and Joan Beaufort, Countess of Westmoreland, a daughter of John of Gaunt by his third wife, Katherine de Roët, making her a direct descendant of Edward III. 
 Link Information: He married twice: Answer: 2
answer:

How many wives did Katherine's maternal grandfather have?