<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://clv.h-cdn.co/assets/cm/15/09/480x552/54eb5278787fb_-_clv-clam-pesto-bacon-leek-pizza-0911-xl.jpg>
<http://www.countryliving.com/food-drinks/g1174/guide-to-pizza/>