<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://del.h-cdn.co/assets/cm/15/10/54f643016e6de_-_edf_oct06_howto_pizza_sxl.jpg>
<http://www.delish.com/cooking/g246/ricotta-recipes/?src=shelter_footer>