<http://schema.org/description>
"Only 300 addax antelopes survive in wild and 200 live in North American zoos."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.upi.com/Science_News/Blog/2013/07/02/Two-endangered-addax-antelopes-born-at-Illinois-zoo/1851372812782/>