<http://schema.org/image_url>
"http://media.mlive.com/news/detroit_impact/photo/israel-protest-detroitjpg-254dd5d8a95eb8d6.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://photos.mlive.com/5628/gallery/detroit_pro-palestine_protest/index.html>