<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/11/640x500/54fe9c1218619-mr-clean-magic-eraser-0909-04x3js-s2.jpg>
<http://www.goodhousekeeping.com/institute/about-the-institute/a18662/100-problems-solved-by-the-seal/>