<http://schema.org/description>
"One night without sleep increases the chemical dopamine in the brain, which may help explain how how the sleep-deprived stay alert, U.S. researchers said."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.upi.com/Health_News/2008/08/22/Lack-of-sleep-increases-dopamine/UPI-41301219452659/>