<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/480x322/54ca6584a9836_-_scrap-metal-05-0811-xln-87908542.jpg>
<http://www.popularmechanics.com/science/environment/g169/how-to-sell-scrap-metal-for-money/>