<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/320x213/54cb2925ab423_-_rescue-drones-01-0214-de.jpg>
<http://www.popularmechanics.com/military/g1437/5-ways-drones-could-come-to-your-rescue/>