<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/06/54cfcb2d102ef_-_missouri-dam-de-77224898.jpg>
<http://www.popularmechanics.com/technology/infrastructure/a6042/top-5-engineering-projects-in-2010/>