<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/640x428/54cb1a1f9c220_-_canyon-02-0813-de.jpg>
<http://www.popularmechanics.com/science/environment/a9395/mega-canyon-discovered-under-greenland-ice-15863125/>