<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/768x516/54ca6587882bc_-_scrap-metal-15-0811-xln.jpg>
<http://www.popularmechanics.com/science/environment/g169/how-to-sell-scrap-metal-for-money/>