<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/480x360/54caf091bc4fa_-_space-missions-04-0712-de.jpg>
<http://www.popularmechanics.com/space/g912/the-dream-space-missions-of-3-scientists/>