<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/640x430/54ca65861543f_-_scrap-metal-09-0811-xln-1951452.jpg>
<http://www.popularmechanics.com/science/environment/g169/how-to-sell-scrap-metal-for-money/>