<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://roa.h-cdn.co/assets/cm/14/47/980x551/546b128c6253a_-_porschedieseltractor-lg.jpg>
<http://www.roadandtrack.com/car-culture/a5066/buy-this-1958-porsche-diesel-tractor-and-a-swank-jacket/>