<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/11/54ffcfaf585fa-product-images-luv-acc-mattress-2-2876-200.jpg>
<http://www.goodhousekeeping.com/institute/a24168/lg-vacuum-cleaner/>