<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/2013/02/07/130207181701_sp_drone_304x171_dcspoliciafederal_nocredit.jpg>
<http://www.bbc.com/arabic/worldnews/2013/02/130220_germany_iran_drone.shtml>