<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/15/38/980x490/landscape-1442584252-walkman2-980.jpg>
<http://www.popularmechanics.com/technology/gadgets/reviews/g165/101-gadgets-that-changed-the-world/>