<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/480x360/54caefcfd698b_-_lawnmower-guide-08-0712-de.jpg>
<http://www.popularmechanics.com/home/tools/reviews/g867/how-to-pick-the-right-mower-for-your-lawn/>