<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://hbu.h-cdn.co/assets/cm/15/04/320x250/54bf2b5e7ab55_-_1-bookshelves-xlg-36668618.jpg>
<http://www.housebeautiful.com/room-decorating/g524/uses-for-bookshelves/>