<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/2013/02/20/130220133441_london_underground_white_bbc_304x171_bbc_nocredit.jpg>
<http://www.bbc.com/hindi/international/2013/02/130221_international_britain_london_ia.shtml>