<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/11/54ffdccd126d6-white-teeth-orig-master-1.jpg>
<http://www.goodhousekeeping.com/health/wellness/a24621/at-home-tooth-whitening/>