<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://del.h-cdn.co/assets/cm/15/10/54f6559e72c83_-_4-sweet-potatoes-lgn-62506820-lg.jpg>
<http://www.delish.com/food/g680/food-facts/?src=shelter_footer>