<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://clv.h-cdn.co/assets/cm/15/09/640x430/54eb5279b827b_-_clv-tomato-basil-pizza-0911-xl.jpg>
<http://www.countryliving.com/food-drinks/g1174/guide-to-pizza/>