<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/480x360/54caf560dc984_-_amphibious-cars-06-0812-lgn.jpg>
<http://www.popularmechanics.com/cars/g916/swimming-with-cars-9-amphibious-vehicles/>