<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://del.h-cdn.co/assets/cm/15/10/320x320/54f651223c65b_-_martha-stewarts-hamburgers-recipe-rbk0812-iazcki-xl.jpg>
<http://www.delish.com/cooking/g576/cheeseburger-recipes/>