<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://hbu.h-cdn.co/assets/cm/15/04/980x551/54c157a266b7e_-_01-hbx-aura-smart-sleep-system-0514-de.jpg>
<http://www.housebeautiful.com/shopping/home-gadgets/tips/g1767/ergonomic-home-furniture/>