<http://schema.org/primaryImageOfPage>
"http://media.mnn.com/assets/images/2010/12/02_leopards-2.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/animals/photos/bouncing-zoo-babies-of-2010/clouded-leopard-cubs>