<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef-1.bbci.co.uk/news/560/media/images/62697000/jpg/_62697983_c0139973-dna_molecule,_artw.jpg>
<http://www.bbc.co.uk/news/health-19202141?postId=113629447>