<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/640x430/54cacbc883945_-_pools-06-0711-xln.jpg>
<http://www.popularmechanics.com/technology/design/g594/worlds-18-strangest-pools/>