<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/06/480x360/54cfd7f398eba_-_game-controllers-02-0614-de.jpg>
<http://www.popularmechanics.com/culture/gaming/g1547/from-pong-to-oculus-rift-the-evolution-of-the-game-controller/>