<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef-1.bbci.co.uk/news/560/media/images/70025000/jpg/_70025907_c0160122-snow_covered_slope_at_sunrise,_greenland-spl.jpg>
<http://www.bbc.co.uk/news/science-environment-24173504>