<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/tv/the-sing-off/interviews/a353572/the-sing-off-pentatonix-interview-we-want-mainstream-success/>