<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/54caae1ccd199_-_futuramapinball_500_0810.jpg>
<http://www.popularmechanics.com/culture/gaming/how-to/a6144/pinball-machine-mods/>