<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://roa.h-cdn.co/assets/cm/14/47/546b5b9f1b5f6_-_tech-tidbits_span-60-lg.jpg>
<http://www.roadandtrack.com/new-cars/car-technology/news/a13088/driving-bmws-hydrogen-7/>