<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef.bbci.co.uk/news/560/media/images/65192000/jpg/_65192092_m1320333-immunofluorescent_lm_of_melanoma_cancer_cells-spl.jpg>
<http://www.bbc.com/news/health-20956179>