<http://schema.org/about>
"Friends and enemies in the animal world tend to be pretty clear-cut -- there are some species that just weren't born to get along. But as these unlikely pairs show, even Mother Nature doesn't set things in stone: Who says that orangutans and tigers, dogs "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/slideshows/natural-sciences/10-unbelievable-unlikely-animal-friendships/>