<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://del.h-cdn.co/assets/15/35/980x735/gallery-1440457035-9-roasted-sweet-potato-frittata.JPG>
<http://www.delish.com/cooking/g505/potato-history-recipes/?src=shelter_footer>