<http://schema.org/about>
"Pigs are smart. As smart animals, they can be easily bored. Bored pigs become more aggressive, posing a danger to themselves and causing losses for Concentrated Animal Feeding Operation (CAFO) farmers,"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/green-food/can-bored-pigs-benefit-from-toys-inspired-by-ikea.html>