<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/10/54fa19a12c49c-ghk-rf-0307-sweet-potato-stew-lgn.jpg>
<http://www.goodhousekeeping.com/food-recipes/g657/sweet-potato-recipes/>