<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef.bbci.co.uk/news/560/media/images/62553000/jpg/_62553357_f0031995-couple_drinking_water_on_a_beach-spl.jpg>
<http://www.bbc.com/news/health-20710388>