<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/06/54cfcd660d522_-_border_tech_03_0810-lg-32679263.jpg>
<http://www.popularmechanics.com/military/a6028/us-southern-border-fence-tech-map/>