<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://hbu.h-cdn.co/assets/cm/15/05/320x250/54c91a9d9cb78_-_2-bookshelves-xlg-95558389.jpg>
<http://www.housebeautiful.com/room-decorating/g524/uses-for-bookshelves/>