<http://schema.org/about>
"Your impressions of zoos and circuses may be all about healthy animals, up-close glimpses of rare creatures, and the captive breeding programs that can bring endangered species back from the brink -- but not all of"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/natural-sciences/5-disgusting-and-depressing-stories-of-captive-animal-abuse.html>