<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://del.h-cdn.co/assets/cm/15/10/54f65122afcca_-_cristinas-no-fuss-cheeseburgers-opr0410-xl-26103048.jpg>
<http://www.delish.com/cooking/g576/cheeseburger-recipes/>