<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/54c86d5b16261_-_water-cooling-5-0407.jpg>
<http://www.popularmechanics.com/technology/gadgets/how-to/a1471/4213273/>