<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/320x240/54cb1ad6ca486_-_a-drone-for-every-purpose-02-0913-de.jpg>
<http://www.popularmechanics.com/military/g1282/a-drone-for-every-purpose/>