<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://roa.h-cdn.co/assets/cm/14/47/640x391/546b74d4a6b14_-_bridgestone-air-free-tire-concept-1-lg.jpg>
<http://www.roadandtrack.com/new-cars/car-technology/news/a17738/bridgestone-air-free-tire-concept/>