<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/320x240/54caf5e09c858_-_mega-engineering-09-0912-lgn.jpg>
<http://www.popularmechanics.com/technology/design/g959/one-world-trade-center-and-9-more-feats-of-mega-engineering/>