<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/2013/03/14/130314061210_spratlys_battle_464x261_afp.jpg>
<http://bbcvietnamese.com/vietnamese/vietnam/2013/03/130314_spratly_battle_anniversary.shtml>