<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/54caa8741dee9_-_lock-bullet-md.jpg>
<http://www.popularmechanics.com/technology/security/reviews/a5913/can-your-padlock-withstand-a-bullet/>