<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/640x400/54cb169ba7acb_-_zippo-wallet-02-0713-de.jpg>
<http://www.popularmechanics.com/technology/gadgets/a9214/stainless-steel-spending-the-zippo-wallet-15710278/>