<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/640x320/54caf09a9f3ab_-_armed-quadrotor-0712-de.jpg>
<http://www.popularmechanics.com/military/a7926/armed-quadrotors-are-coming-10720086/>