<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/11/54fe9332d242c-duff-before-ds-de.jpg>
<http://www.goodhousekeeping.com/health/diet-nutrition/a16929/diet-success-duff-1103/?src=shelter_footer>