<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://digitalspyuk.cdnds.net/12/14/640x320/landscape_screen-shot-2012-04-02-at-16.55>
<http://www.digitalspy.com/music/news/a374452/katy-perry-debuts-part-of-me-3d-concert-movie-trailer-watch/>