<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/480x360/54cb03c9de555_-_high-tech-vending-machines-03-1220-lgn.jpg>
<http://www.popularmechanics.com/technology/g1041/8-high-tech-vending-machines/>