<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/640x426/54cb203e2606a_-_willis-tower-1113-de.jpg>
<http://www.popularmechanics.com/technology/design/a9672/one-world-trade-center-captures-title-as-tallest-in-western-hemisphere-16149193/>