<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://clv.h-cdn.co/assets/cm/15/09/54eb69485ebd1_-_09-dull-to-delightful-stairway-0814-xln.jpg>
<http://www.countryliving.com/home-design/decorating-ideas/g1498/staircase-ideas/>