<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://roa.h-cdn.co/assets/cm/14/47/980x551/546b099f4a073_-_2013_indy500_practice_051613_pruett0042-lg.jpg>
<http://www.roadandtrack.com/motorsports/news/g3765/photos-2013-indy-500-practice-sessions/>