<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/54cb1fdae72f9_-_meteor-hunters-01-1113-de.jpg>
<http://www.popularmechanics.com/space/deep-space/a9735/why-is-this-rock-worth-400000-dollars-16134667/>