<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/480x360/54cb17e3235f5_-_bho-jetpacks-02-0713-de.jpg>
<http://www.popularmechanics.com/flight/g1267/a-brief-history-of-the-jetpack/>