<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef.bbci.co.uk/news/560/media/images/72606000/jpg/_72606573_c0176623-hiker,_crowley_s_ridge,_arkansas-spl(1).jpg>
<http://www.bbc.co.uk/news/health-27194824>