<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/54caaf3979d48_-_oldrivercontrolstructure_120_0610-sm.jpg>
<http://www.popularmechanics.com/science/energy/a6163/bp-oil-spill-report-ongoing-coverage/>