<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/54c84ca1b6489_-_pmx1006dissater005a_large-lgn.jpg>
<http://www.popularmechanics.com/science/environment/a4875/3852052/>