<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/480x328/54ca8eb622d52_-_oscillating-tools-05-0709-lgn.jpg>
<http://www.popularmechanics.com/home/tools/reviews/g245/4325505/>