<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://del.h-cdn.co/assets/cm/15/10/54f650021860e_-_spanish-tortilla-chorizo-peppers-xl-5dymwa-96827959.jpg>
<http://www.delish.com/cooking/g505/potato-history-recipes/?src=shelter_footer>