<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://clv.h-cdn.co/assets/cm/15/09/320x368/54eb52774eff0_-_clv_pizza_tomatosauce_xl.jpg>
<http://www.countryliving.com/food-drinks/g1174/guide-to-pizza/>