<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/640x320/54cb2a91b75e5_-_hydrogen-car-0214-de.jpg>
<http://www.popularmechanics.com/cars/hybrid-electric/a10175/the-hydrogen-car-is-back-again-16528552/>