<http://schema.org/about>
"Many adjectives come to mind when thinking about ants, but 'idle' likely isn't among them. But recently biologists discovered that after a lifetime of service in their namesake occupation, older leaf-cutter ants eventually"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/natural-sciences/biologists-discover-that-some-ants-eventually-retire.html>