<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef-1.bbci.co.uk/news/560/media/images/67354000/jpg/_67354107_2013_04_23_accrossamerica_goldengatebridge_revillard_01.upload.jpg>
<http://www.bbc.com/news/science-environment-23195087>