<http://www.w3.org/1999/02/22-rdf-syntax-ns#rest>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#nil>
<http://www.digitalspy.com/showbiz/duets/news/a382057/britney-spears-demi-lovato-arent-really-singers-says-john-legend/>