<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef-1.bbci.co.uk/news/560/media/images/61696000/png/_61696306_usethispii2010b1_nasamodis_18july2012_1625utc_forcordelia.png>
<http://www.bbc.co.uk/news/magazine-18877451>