<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/320x240/54caf1e63f833_-_upright-mowers-02-0812-de.jpg>
<http://www.popularmechanics.com/home/tools/reviews/g911/the-best-walk-behind-lawnmowers-comparison-test/>