<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://roa.h-cdn.co/assets/cm/14/47/980x551/546b2ef9d18f6_-_2015-chevrolet-silverado-2500hd-bifuel-042-lg.jpeg>
<http://www.roadandtrack.com/car-shows/chicago-auto-show/news/a6964/2015-silverado-bi-fuel-heavy-duty-chicago/>