<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/640x400/54cac2e1749cd_-_brooklyn-bridge-0411-de.jpg>
<http://www.popularmechanics.com/technology/design/a6619/a-new-brooklyn-bridge-this-time-made-of-trees-5618483/>