<http://schema.org/description>
"(HealthDay) -- A look at statistics stretching from 1935 to 2010 found significant improvements in Americans' expected lifespans, mainly due to factors such as better medical care and declines in smoking rates."^^<http://www.w3.org/2001/XMLSchema#string>
<http://medicalxpress.com/news/2012-03-year-lifespans.html>