<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/480x240/54caef529ec1f_-_drone-sensors-01-0612-de.jpg>
<http://www.popularmechanics.com/military/g1741/4-new-drone-sensors-that-changed-warfare-and-what-could-happen-when-they-come-home-9549377/>