<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/12/55093e0c5c329-gratedcheese-ad-1974-mdn.jpg>
<http://www.goodhousekeeping.com/food-recipes/a25300/food-ads-from-1974/>