<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://del.h-cdn.co/assets/cm/15/10/54f68bf38e237_-_edf_jul06_burger_pork_sxl-2.jpg>
<http://www.delish.com/holiday-recipes/a37087/best-burger-recipes/>