<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://digitalspyuk.cdnds.net/12/39/640x320/landscape_gaming_halo_4_spartan_ops_screen_3.jpg>
<http://www.digitalspy.com/gaming/news/a443916/halo-4-spartan-ops-campaign-to-resume-early-2013/>