<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://edc.h-cdn.co/assets/cm/15/04/480x600/54c1643e98408_-_3_1371138858_edc090112wearstler09_lgn-xln.jpg>
<http://www.elledecor.com/design-decorate/room-ideas/g511/unique-staircase-design/>