<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/480x360/54cb0b155e5c1_-_ways-planets-beat-earth-04-0313-de.jpg>
<http://www.popularmechanics.com/space/g1133/7-ways-other-planets-and-moons-have-earth-beat/>