TASK DEFINITION: In this task, you're given a statement, 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'.
PROBLEM: Context: Fitzgerald suffered a nervous breakdown in 1911 Link Information: Harry Kendall Thaw (February 12, 1871 – February 22, 1947) w Question: How old was the man who killed Stanford white when Fitzgerald had a nervous breakdown?

SOLUTION: Answer: 40

PROBLEM: Context: could not make his debut, until 3 October 1999 against Cardiff City. In that match Link Information: Cardiff City Football Club () is a professional association football club based in Cardiff, Wales. It competes in the Championship, the second tier of the English football league system. Fo Question: On October 3, 1999 Bhutia played against a team from what country?

SOLUTION: Answer: United Kingdom

PROBLEM: Context: Inspired by the rioting in Copenhagen that followed the destruction of the Ungdomshuset(Youth House), 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?

SOLUTION:
Answer: 900