<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/11/480x552/54ff053e949c8-1212-go-smile-whitening-system-xl.jpg>
<http://www.goodhousekeeping.com/beauty-products/teeth-whitening-product-reviews/g518/best-at-home-tooth-whitening/>