<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/06/54d0e83b69c61_-_diy_luge_06_0111-xl.jpg>
<http://www.popularmechanics.com/adventure/sports/a6401/how-to-build-your-own-backyard-luge/>