<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef-1.bbci.co.uk/news/560/media/images/64196000/jpg/_64196048_c0087499-concentrating_solar_power_plant-spl.jpg>
<http://www.bbc.co.uk/news/science-environment-20357167>