<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef.bbci.co.uk/news/ws/560/amz/worldservice/live/assets/images/2013/03/12/130312112109_traffic_police_vietnam_304x171_afp.jpg>
<http://bbcvietnamese.com/vietnamese/vietnam/2013/03/130313_chinh_quyen_va_tu_do.shtml>