<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef-1.bbci.co.uk/news/560/media/images/71710000/jpg/_71710384_e1000238-antarctic_ozone_hole,_2006-spl.jpg>
<http://www.bbc.com/news/science-environment-25344563>