<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/54c8798c16605_-_05-nikon-d40-0707-73317060.jpg>
<http://www.popularmechanics.com/technology/gadgets/a1746/4217950/>