<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/2014/05/16/140516050525_1_624x351_ap_nocredit.jpg>
<http://www.bbc.com/vietnamese/vietnam/2014/05/140517_bill_hayton_vietnam_protests.shtml>