<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://hbz.h-cdn.co/assets/cm/15/04/320x408/54bf201b7954b_-_hbz-david-hockney-3-1211-de.jpg>
<http://www.harpersbazaar.com/culture/art-books-music/g1753/david-hockney-art-1211/>