<http://schema.org/about>
"It's thought that in the 1970s, 65,000 black rhinos roamed Africa. By the mid-1990s, only an estimated 2,300 survived. This dramatic loss is the largest among any rhino species and protecting those that remain against"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/natural-sciences/black-rhino-calf-born-at-the-saint-louis-zoo-photos.html>