<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/320x368/54cad33e210c1_-_capilano-cliffwalk-08-0911-xln.jpg>
<http://www.popularmechanics.com/technology/design/g664/the-daring-engineering-behind-vancouvers-capilano-cliffwalk/>