<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef.bbci.co.uk/news/560/media/images/61404000/jpg/_61404094_flyingknifenoaa304.jpg>
<http://www.bbc.co.uk/news/science-environment-18737014?postId=112987736>