<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/06/768x516/54d11dba35cf6_-_auto_gyro_01_0111-xl.jpg>
<http://www.popularmechanics.com/military/g468/the-rise-of-the-drone-helicopter/>