<http://schema.org/primaryImageOfPage>
"http://media.mnn.com/assets/images/2011/08/20110802_zaf_a11_061.jpg_209f65353d.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/green-tech/gadgets-electronics/photos/eco-photos-of-the-week-july-31-aug-6/lady-of-the-lake>