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 Q]: Passage: The Yardbirds are an English blues rock band from London. Formed in May 1963, the group originally included lead vocalist Keith Relf, lead guitarist Anthony "Top" Topham, rhythm guitarist Chris Dreja, bassist Paul Samwell-Smith and drummer Jim McCarty. In October, Topham was replaced by Eric Clapton. He remained until 13 March 1965, when he left due to creative disagreements. Clapton recommended Jimmy Page to replace him, but he declined and Jeff Beck took over. Page later joined on bass the following June, after Samwell-Smith abruptly quit; Dreja later took over the role, allowing Page to join Beck on guitar. This lineup was short-lived, however, as Beck left in November 1966. The group continued as a four-piece until July 1968, when Relf and McCarty left due to creative differences, primarily with Page. Dreja initially remained, but by August Page formed a new group with vocalist Robert Plant, bassist John Paul Jones and drummer John Bonham, who later renamed themselves Led Zeppelin.
 Link Information: who later renamed themselves Led Zeppelin. Question: In what year did the Yardbirds rename themselves Led Zeppelin?
[EX A]: Answer: 1968

[EX Q]: Passage: Wasson was born Isabel Deming Bassett in Brooklyn, NY on January 11, 1897, daughter of urban planner Edward Bassett and Annie Preston Bassett, and sister of inventor and engineer Preston Bassett. Wasson graduated Phi Beta Kappa from Wellesley College in 1918, majoring in history so she could take a wide range of science courses. She took classes in geology after graduation at the University of Chicago and the Massachusetts Institute of Technology. She met her future husband, petroleum geologist Theron Wasson, whom she married in 1920, while working towards a master's degree in geology at Columbia University, which she finished in 1934. They had three children: Elizabeth W. Bergstrom, a biologist; Edward B. Wasson, a petroleum geologist; and Anne Harney Gallagher, an art historian. Wasson worked as a petroleum geologist in her husband's office at the Pure Oil Company from the early 1920s until 1928. She published two scholarly articles on geology, one co-authored with her husband about an oil field discovered by Pure Oil in 1914, and another by herself about the ages of rock formations in Ohio and new terminology for them; the latter was cited in a number of other papers and a recent book. After 1928 she spent over 50 years in River Forest, IL, teaching science in the local public schools, lecturing, bird watching (ornithology), and mentoring generations of young naturalists. She was quoted in this 1986 Chicago Tribune article as an expert on local geology at age 89. She was honored for her contributions to local history in 1982 when the Wasson Room was named after her in a local school to hold local history resources. Her interests included archaeology; she discovered a Native American religious mound in Thatcher Woods, near her house in River Forest, in the 1930s. An article about her discovery called her "the one who started the environmental education movement in America back in the 1920s and '30s." Theron and Isabel divorced in 1953 and she did not remarry. From 1953-1954, Wasson served as President of the Chicago Ornithological Society. Wasson also taught classes at the Morton Arboretum in Lisle, Illinois. She died in La Grange Park, IL, in 1994.
 Link Information: Theron Rhodes Wasson (1887-1970) Question: At what age did Theron Wasson marry Isabel Wasson?
[EX A]: Answer: 33

[EX Q]: Passage: John Francis Barnett was the son of John Barnett's brother, Joseph Alfred, also a professor of music. John Francis carried on the traditions of the family as a composer and teacher. He obtained a queen's scholarship at the Royal Academy of Music, studied under William Sterndale Bennett and developed into an accomplished pianist, visiting Germany to study in 1857 and playing Mendelssohn's Piano Concerto No. 2 in D minor at a Gewandhaus concert at Leipzig in 1860. His teachers at the Conservatoire in Leipzig included the great pianist Ignaz Moscheles, who had been a pupil of Beethoven. Back in Britain, Barnett enjoyed a successful career as a pianist for some years but concentrated increasingly on composition and teaching. He became noticed as a composer with his symphony in A minor (1864), and followed this with a number of compositions for orchestra, strings and piano. His cantata The Ancient Mariner premiered at Birmingham in 1867, and another, Paradise and the Peri, in 1870, both successfully. In 1873 his most important work, the oratorio The Raising of Lazarus, was written, and in 1876 produced at Hereford. During this period, Barnett also composed several other minor cantatas and piano pieces, and he took an active part as a professor at the Guildhall School of Music and one of the founder-professors of the Royal College of Music, where his students included Marmaduke Barton.
 Link Information: 

The Royal College of Music is a conservatoire established by royal charter in 1882, located in South Kensington, London, UK. Question: In what city did Barnett teach Maramduke Barton?
[EX A]:
Answer: London, UK