<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef-1.bbci.co.uk/news/560/media/images/72256000/jpg/_72256893_n8100033-view_of_historical_apothecary_medicine_bottles-spl.jpg>
<http://www.bbc.co.uk/news/health-25712005>