<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef-1.bbci.co.uk/news/ws/560/amz/worldservice/live/assets/images/2013/08/31/130831182247_obama_304x171_afp_nocredit.jpg>
<http://bbcvietnamese.com/vietnamese/world/2013/09/130901_syria_chemical_attack_comments.shtml>