Input: Read this: BYU alumni in academia include former Dean of the Harvard Business School Kim B. Clark, two time world's most influential business thinker Clayton M. Christensen, Michael K. Young '73, current president of the University of Washington, Matthew S. Holland, current president of Utah Valley University, Stan L. Albrecht, current president of Utah State University, Teppo Felin, Professor at the University of Oxford, and Stephen D. Nadauld, previous president of Dixie State University. The University also graduated Nobel Prize winner Paul D. Boyer, as well as Philo Farnsworth (inventor of the electronic television) and Harvey Fletcher (inventor of the hearing aid). Four of BYU's thirteen presidents were alumni of the University. Additionally, alumni of BYU who have served as business leaders include Citigroup CFO Gary Crittenden '76, former Dell CEO Kevin Rollins '84, Deseret Book CEO Sheri L. Dew, and Matthew K. McCauley, CEO of children's clothing company Gymboree.
Question: What title does Michael K. Clark currently have?

Output: unanswerable

Input: Read this: The boundaries of Somerset are largely unaltered from medieval times. The River Avon formed much of the border with Gloucestershire, except that the hundred of Bath Forum, which straddles the Avon, formed part of Somerset. Bristol began as a town on the Gloucestershire side of the Avon, however as it grew it extended across the river into Somerset. In 1373 Edward III proclaimed "that the town of Bristol with its suburbs and precincts shall henceforth be separate from the counties of Gloucester and Somerset... and that it should be a county by itself".
Question: In what year was Somerset established?

Output: unanswerable

Input: Read this: On 11 June 2009, four Uyghurs who had been held in the United States Guantanamo Bay detention camp, in Cuba, were transferred to Bermuda. The four men were among 22 Uyghurs who claimed to be refugees, who were captured in 2001 in Pakistan after fleeing the American aerial bombardment of Afghanistan. They were accused of training to assist the Taliban's military. They were cleared as safe for release from Guantanamo in 2005 or 2006, but US domestic law prohibited deporting them back to China, their country of citizenship, because the US government determined that China was likely to violate their human rights.
Question: How many Uyghurs were transferred to Bermuda on 9 June 2011?

Output: unanswerable

Input: Read this: Von Neumann's results have been viewed as a special case of linear programming, where von Neumann's model uses only nonnegative matrices. The study of von Neumann's model of an expanding economy continues to interest mathematical economists with interests in computational economics. This paper has been called the greatest paper in mathematical economics by several authors, who recognized its introduction of fixed-point theorems, linear inequalities, complementary slackness, and saddlepoint duality. In the proceedings of a conference on von Neumann's growth model, Paul Samuelson said that many mathematicians had developed methods useful to economists, but that von Neumann was unique in having made significant contributions to economic theory itself.
Question: What was the significance of von Neumann's model of expanding economy?

Output:
unique in having made significant contributions to economic theory itself.