<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/15/47/980x551/gallery-1447790241-2-london-aquatics-centre-interior-1.jpg>
<http://www.popularmechanics.com/technology/design/g3/10-incredibly-cool-swimming-pools/>