<http://schema.org/description>
"Languages spoken by billions of people in Europe and Asia have been traced to single mother tongue used in southern Europe 15,000 years ago, researchers say."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.upi.com/Science_News/2013/05/06/Languages-of-Europe-Asia-said-all-from-ancient-mother-tongue/UPI-49041367883215/?spt=hs&or=sn>