<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef.bbci.co.uk/news/560/media/images/74596000/jpg/_74596171_f0063585-brain_and_nerve_cells,_neural_network-spl.jpg>
<http://www.bbc.co.uk/news/health-27236004>