<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/480x360/54cb277364e4b_-_old-infrastructure-08-0114-de.jpg>
<http://www.popularmechanics.com/technology/infrastructure/g1407/the-oldest-working-infrastructure-in-america/>