<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/640x267/54cae7562f9d6_-_supersonic-biplane-03-0312-de.jpg>
<http://www.popularmechanics.com/flight/a7517/the-return-of-the-supersonic-biplane-7505124/>