<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://clv.h-cdn.co/assets/cm/15/09/480x480/54eb887aa2a28_-_aviolin-pool-qbf6ho-de.jpg>
<http://www.countryliving.com/gardening/g1748/cool-shaped-pools/>