<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/160x120/54ca658402f8b_-_scrap-metal-10-0811-mdn.jpg>
<http://www.popularmechanics.com/science/environment/g169/how-to-sell-scrap-metal-for-money/>