<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/54cac5ae05a29_-_mileage-tips-06-0511-mdn.jpg>
<http://www.popularmechanics.com/cars/a6827/6-driving-tactics-to-save-gas-this-weekend/>