<http://schema.org/about>
"After the sudden death of polar bear favorite Knut on Saturday, the Berlin Zoo has come under accusations that stress killed Knut -- stress due to a broken heart, mobbing"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/culture/what-killed-knut-autopsy-results-released.html>