<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef-1.bbci.co.uk/news/560/media/images/62479000/jpg/_62479741_m3710032-view_of_a_man_smoking_a_cannabis_joint-spl.jpg>
<http://www.bbc.co.uk/news/health-19372456>