<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef-1.bbci.co.uk/news/560/media/images/66335000/jpg/_66335878_c0063041-oceanic_whitetip_shark-spl.jpg>
<http://www.bbc.com/news/science-environment-21781949>