<http://schema.org/description>
"A lack of vitamin D may be put seniors at increased risk of developing mobility limitations and disability, U.S. researchers found."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.upi.com/Health_News/2012/05/30/Vitamin-D-lack-restricts-senior-mobility/UPI-82511338353963/>