<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef.bbci.co.uk/news/560/media/images/77188000/jpg/_77188378_c0164458-erythropoietin_hormone_complex-spl.jpg>
<http://www.bbc.co.uk/news/health-28937501>