<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/54ca77c478b53_-_steampunk-1-470-1108.jpg>
<http://www.popularmechanics.com/technology/gadgets/how-to/a3726/4290111/>