<http://schema.org/about>
"Some 15 million years ago, mobs of 150-pound (70-kilogram) marsupials roamed the treetops of Australia's rain forests, researchers say."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/animals/stories/massive-marsupials-once-swung-from-treetops-down-under>