<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://roa.h-cdn.co/assets/cm/14/47/546b71026158b_-_2011-porsche-boxster-spyder-vs-2011-audi-s4-2-lg.jpg>
<http://www.roadandtrack.com/new-cars/car-comparison-tests/reviews/a17389/2011-porsche-boxster-spyder-vs-2011-audi-s4/>