<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/06/54cfce0e6fea9_-_roller-coaster-genius-de-73946834.jpg>
<http://www.popularmechanics.com/home/outdoor-projects/a13101/the-diy-backyard-rollercoaster-backyard-genius-awards/>