<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef-1.bbci.co.uk/news/560/media/images/59381000/jpg/_59381812_c0115372-milky_way_over_a_desert-spl.jpg>
<http://www.bbc.co.uk/news/science-environment-17539315>