<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef.bbci.co.uk/news/560/media/images/65750000/jpg/_65750466_c0125034-neanderthal_research,_la_ferrassie_1-spl.jpg>
<http://www.bbc.com/news/science-environment-21350900>