<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://edc.h-cdn.co/assets/cm/15/04/320x400/54c1643f349fc_-_deniot-edc-11-13-15-lgn-42159878-lgn.jpg>
<http://www.elledecor.com/design-decorate/room-ideas/g511/unique-staircase-design/>