<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://digitalspyuk.cdnds.net/11/49/music_adele_generic_1.jpg>
<http://www.digitalspy.com/music/news/a358113/adeles-rolling-in-the-deep-most-played-song-on-spotify-in-2011/>