<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef.bbci.co.uk/news/560/media/images/64741000/jpg/_64741636_158_-_andy_7_rob_attaching_the_hose_to_the_drill_head_in_the_wellhead.jpg>
<http://www.bbc.com/news/science-environment-20817560>