<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://del.h-cdn.co/assets/cm/15/10/54f6971a6f292_-_hamburger-grape-tomato-pizza-mslo0109-xl.jpg>
<http://www.delish.com/cooking/a38143/martha-stewart-pizza/>