<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/54cb0f874edcb_-_b2-bomber-03-0513-de.jpg>
<http://www.popularmechanics.com/military/a8931/from-wwii-to-the-b2-the-evolution-of-the-flying-wing-15438863/>