<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/320x480/54cae46fa38a7_-_parachute-history-04-0212-lgn.jpg>
<http://www.popularmechanics.com/flight/g815/a-brief-history-of-the-parachute/>