In this task, you're given a passage, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.

Ex Input:
Passage: As an amateur, Doherty won the Irish Amateur Championship twice, the World Under-21 Amateur Championship and the World Amateur Championship. Having turned professional in 1990, Doherty has won a total of six ranking tournaments, including the 1997 World Snooker Championship in which he defeated Stephen Hendry, inflicting Hendry's first loss in a world final. This made him the first player, and so far one of only two (the other being Stuart Bingham) to have been world amateur and professional champion. The following year, he came very close to breaking the Crucible curse, reaching the 1998 final where he lost out to John Higgins. He reached a third final in 2003, in which he was defeated by Mark Williams. In other triple crown events, he is a three-time UK Championship runner-up and a two-time Masters runner-up.
 Link Information: Mark James Williams, (born 21 March 1975) is a Welsh professional snooker player who is a three-time World Champion Question: How many World Snooker Championships have been won by the person who defeated Doherty in the 2003 final?

Ex Output:
Answer: three


Ex Input:
Passage: After school, Greg settled into a life of steady productivity, while living on the proceeds of his shares of The Economist. Working in close association with A. H. Bullen, he produced Pastoral Poetry and Pastoral Drama (1906), the first edited version of the account books of Philip Henslowe (1906–8) and the papers of Edward Alleyn. The latter two works provided him with a knowledge of Renaissance theatrical conditions perhaps rivaled only by E. K. Chambers, and this knowledge he applied to the publications of the Malone Society, which he served as general editor between 1906 and 1939. He served as Librarian of Trinity College, 1907–13, resigning after his marriage to his cousin Elizabeth Gaskell. As an independent scholar, Greg produced editions of The Merry Wives of Windsor (1910), Robert Greene's Orlando Furioso and George Peele's The Battle of Alcazar (published together, 1923), and Sir Thomas More (1911). He returned to specific editing with work on Doctor Faustus (1950). Greg also wrote on the material conditions of Renaissance theater and publishing; his work in this regard includes Dramatic Documents from the Elizabethan Playhouses (1931) and English Literary Autographs, 1550–1650 (1932). The Variants in the First Quarto of King Lear (1940) offered a careful examination of this printing. He also wrote hundreds of reviews, including a notably caustic rejection of J. Churton Collins's 1905 Oxford edition of Robert Greene.
 Link Information: Arthur Henry Bullen, often known as A. H. Bullen, (9 February 1857, London – 29 February 1920, Stratford-on-Avon) Question: How old was the man that Greg worked closely with to produce Pastoral Poetry and Pastoral Drama?

Ex Output:
Answer: 49


Ex Input:
Passage: Mitchell was born in London, and educated at Brightlands Preparatory School and Dulwich College, London. In 1943 he registered as a conscientious objector and his war-time service was spent in the Non-Combatant Corps. After the war, he taught at Oakfield Preparatory School, London and in 1947 founded and edited the journal Music Survey; several issues appeared before he was joined in 1949 by Hans Keller and the journal was re-launched in the Music Survey's so-called 'New Series' (1949–52), whose uncompromising critical standards and pugnaciously pro-Britten and pro-Schoenberg stance brought it renown and notoriety in equal measure. Mitchell studied at Durham University 1949-50. In the 1950s he was a regular contributor to the journals Musical Times and Musical Opinion. In 1958 he became editor of Music Books at Faber and Faber and in the same year was appointed Editor of Boosey & Hawkes's music journal Tempo, until 1962. From 1963 to 1964 he was a special music adviser at Boosey & Hawkes with particular responsibility for contemporary music and the acquisition of contemporary composers. He was responsible for Peter Maxwell Davies and Nicholas Maw joining the publisher's list. In 1965, with the encouragement of Benjamin Britten he founded the music-publishing firm of Faber Music, and was its first Managing Director (vice-chairman, 1976, chairman, 1977, president, 1988–95). In 1972 he became the first Professor of Music at Sussex University (until 1976). Following the death of Benjamin Britten, Mitchell became a senior trustee of the Britten-Pears Foundation; in 1986 he became the Foundation's director and chairman of the Britten Estate Ltd. From 1989 to 1992 he was chairman of the Performing Right Society. He was appointed a CBE in the 2000 New Year Honours, and died on 28 September 2017.
 Link Information: Hans (Heinrich) Keller (11 March 19196 November 1985) Question: How old was Hans Keller when the journal Music Survey was founded?

Ex Output:

Answer: 28