<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef.bbci.co.uk/news/ws/560/amz/worldservice/live/assets/images/2012/10/24/121024150651_porn_site_336x189_thinkstock_nocredit.jpg>
<http://bbchindi.com/hindi/international/2013/08/130722_uk_pornography_sb.shtml>