<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/54cb0d428e854_-_human-powered-helo-03-0413-mdn.jpg>
<http://www.popularmechanics.com/flight/how-to/a8864/two-teams-one-dream-the-human-powered-helicopter-15354870/>