<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef.bbci.co.uk/news/ws/560/amz/worldservice/live/assets/images/2012/12/27/121227095740_le_quoc_quan_mccain_304x171_lequocquanmccain_nocredit.jpg>
<http://www.bbc.com/vietnamese/vietnam/2013/03/130315_mccain_wsj.shtml>