<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/54ca65f2d5f46_-_pmx0711_gadgets45-lgn.jpg>
<http://www.popularmechanics.com/technology/gadgets/reviews/g165/101-gadgets-that-changed-the-world/?click=main_sr>