<http://schema.org/primaryImageOfPage>
"http://media.mnn.com/assets/images/2010/06/BP_oil_spill_in_the_Gulf_of_Mexi-64464.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/green-tech/gadgets-electronics/photos/eco-photos-of-the-week-june-6-12/oiled-brown-pelicans>