<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/320x240/54caf1e9ca37a_-_upright-mowers-10-0812-lgn.jpg>
<http://www.popularmechanics.com/home/tools/reviews/g911/the-best-walk-behind-lawnmowers-comparison-test/>