<http://schema.org/primaryImageOfPage>
"http://media.mnn.com/assets/images/2014/01/Slide01_GarlicChivesDip.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/food/recipes/photos/6-easy-20-minute-appetizers/garlic-chives-dip>