<http://schema.org/primaryImageOfPage>
"http://media.mnn.com/assets/images/2009/12/Flooded_St_Mark_s_Square_in_Veni-56441.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/green-tech/gadgets-electronics/photos/eco-photos-of-the-week-nov-29-dec-5/flooding-in-venice>