<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/480x360/54cb0fc5e9c7f_-_corded-power-drills-test-01-0513-de.jpg>
<http://www.popularmechanics.com/home/tools/reviews/g1177/tool-test-13-corded-power-drills/>