<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef-1.bbci.co.uk/news/560/media/images/65187000/jpg/_65187029_herschel_s_three-colour_view_of_asteroid_apophis.jpg>
<http://www.bbc.com/news/science-environment-20961003>