<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/06/480x360/54cfd1e58d9bf_-_arctic-challenge-03-0812-de.jpg>
<http://www.popularmechanics.com/science/environment/g921/americas-arctic-challenge/>