<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef-1.bbci.co.uk/news/560/media/images/76729000/jpg/_76729315_ww1posters_nationalrailwaymuseumandsspl_cut.jpg>
<http://www.bbc.co.uk/news/magazine-28642846>