Read this: Assembly of desktop computers for the North American market formerly took place at Dell plants in Austin, Texas (original location) and Lebanon, Tennessee (opened in 1999), which have been closed in 2008 and early 2009, respectively. The plant in Winston-Salem, North Carolina received $280 million USD in incentives from the state and opened in 2005, but ceased operations in November 2010, and Dell's contract with the state requires them to repay the incentives for failing to meet the conditions. Most of the work that used to take place in Dell's U.S. plants was transferred to contract manufacturers in Asia and Mexico, or some of Dell's own factories overseas. The Miami, Florida facility of its Alienware subsidiary remains in operation, while Dell continues to produce its servers (its most profitable products) in Austin, Texas.

What year was Dell's Tennessee facility closed?
What is the answer? (If it cannot be answered, return "unanswerable")
unanswerable