<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/54caf1867c594_-_human-powered-contraptions-03-0712-lgn.jpg>
<http://www.popularmechanics.com/adventure/g893/9-unusual-human-powered-contraptions/>