<http://schema.org/primaryImageOfPage>
"http://media.treehugger.com/assets/images/2012/12/stinging-rose.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/slideshows/natural-sciences/nature-blows-my-mind-14-beautiful-dangerous-caterpillars/page/4/>