<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/06/320x160/54cfd16ee06c6_-_wtc1-photos-01-0512-de.jpg>
<http://www.popularmechanics.com/technology/design/g845/pictures-from-the-top-of-world-trade-center-1/>