<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/54cae756b6da9_-_supersonic-biplane-01-0312-mdn.jpg>
<http://www.popularmechanics.com/flight/a7517/the-return-of-the-supersonic-biplane-7505124/>