<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/640x320/54cb16ebf3a6f_-_mac-retina-lock-01-0713-de.jpg>
<http://www.popularmechanics.com/technology/gadgets/a9238/reviewed-macbook-pro-retina-lock-by-maclocks-15720445/>