<http://schema.org/primaryImageOfPage>
"http://media.mnn.com/assets/images/2009/08/Leopard_cubs_being_treated_at_th-82188.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/green-tech/gadgets-electronics/photos/eco-photos-of-the-week-aug-2-8/leopard-cubs>