<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/06/320x240/54cfd56ab173c_-_bta-products-05-1013-de.jpg>
<http://www.popularmechanics.com/technology/gadgets/g1319/the-10-breakthrough-products-of-2013/>