<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://hbu.h-cdn.co/assets/cm/15/04/320x250/54bf2b60f1c73_-_4-bookshelves-xlg-13677032.jpg>
<http://www.housebeautiful.com/room-decorating/g524/uses-for-bookshelves/>