<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/06/480x552/54d11d750e219_-_freedom-toilet-01-0511-xl.jpg>
<http://www.popularmechanics.com/science/environment/g533/freedom-towers-eco-friendly-toilet-tech/>