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'.

Example Input: Passage: He moved to English club Liverpool for the start of the 2009–10 season but in August 2010, having received only limited playing time at Anfield due to injury, he returned to Italy and joined Juventus on loan until the end of the 2010–11 season. Aquilani returned to Liverpool at the end of the season as Juventus did not take up their purchase option. He went on loan again in 2011, playing for Italian club Milan for the 2011–12 season, and was subsequently sold to Fiorentina in 2012, where he remained until his transfer to Portuguese club Sporting CP in 2015; he returned to Italy in 2016, joining Pescara, and was later loaned to Sassuolo for the second half the season. In 2017, he joined Spanish club Las Palmas, but was released by the club at the end of the season. After a year without a club, he announced his retirement in 2019.
 Link Information: none Question: What position did he play for Juventus?
Example Output: Answer: none

Example Input: Passage: The first obelisks may start to appear in the later 16th century and it is suggested that the obelisk on Compton Pike is Elizabethan in date. More securely dated is a series of obelisks which start to appear in the 18th century. The first of these was the Wakeman obelisk of 1702 by Nicholas Hawksmoor, which is set in the square at Richmond, Yorkshire. Probably several hundred obelisks exist in the British Isles dating from 18th and early 19th centuries. Most of these obelisks, which are often landmarks commemorate famous people and their achievements. At Stowe in Buckinghamshire an obelisk was erected in memory of Wolfe's victory at Quebec in 1752, while at the death of the Duke of Cumberland in 1765 was noted by an obelisk at Englefield Green in Surrey. Thomas Coke, Earl of Leicester, Coke of Norfolk the farming pioneer has a particularly fine obelisk, set up in the park he created at Holkham in Norfolk. Sometimes an obelisk was used to mark the site of a battle such as the obelisk on the site of English Civil War battlefield at Naseby in Leicestershire. Occasionally obelisks are used as mile markers, as on the Great North Road at a mile from Westminster. In Lincoln an elaborate obelisk was set up on the High Bridge in 1762–63 as a conduit for dispensing water, while Anthony Salvin used obelisks as water fountains on the Belton House estates in Lincolnshire.
 Link Information: Nicholas Hawksmoor (probably 1661 – 25 March 1736 Question: What was architect's  age when the Wakeman obelisk was set in the square at Richmond, Yorkshire?
Example Output: Answer: 41

Example Input: Passage: Kiss Kiss Kill Kill is the third album by the Danish punk trio HorrorPops. The cover and songs convey a cinematic theme (particularly those with repressed female protagonists and escapist themes, the obvious example being the track "Thelma and Louise"). The album art mimics archetypical B-movie posters, promising "Twelve Tales About Love and Murder... Starring HorrorPops". Only "Boot to Boot" doesn't conform to the film formula. Inspired by the rioting in Copenhagen that followed the destruction of the Ungdomshuset(Youth House), an anarcho-punk squat and self-managed social centre, by police forces in 2007. Of the album's sound, lead singer Patricia Day stated in the Hellcat review of the album that the band was started "So that we could play all kinds of music [but]... We really wanted to get back to the classic new wave feel that we love. And I think our excitement about these songs has made a hell of difference."
 Link Information: Although the earliest historical records of Copenhagen are from the end of the 12th century, recent archaeological finds in connection with work on the city's metropolitan rail system revealed the remains of a large merchant's mansion near today's Kongens Nytorv from c. 1020. Excavations in Pilestræde have also led to the discovery of a well from the late 12th century. The remains of an ancient church, with graves dating to the 11th century, have been unearthed near where Strøget meets Rådhuspladsen.

These finds indicate that Copenhagen's origins as a city go back at least to the 11th century. Substantial discoveries of flint tools in the area provide evidence of human settlements dating to the Stone Age. Many historians believe the town dates to the late Viking Age, and was possibly founded by Sweyn I Forkbeard. 
The natural harbour and good herring stocks seem to have attracted fishermen and merchants to the area on a seasonal basis from the 11th century and more permanently in the 13th century.  Question: How old is the place that had riots after the destruction of the Ungdomshuset?
Example Output:
Answer: 900