<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/54ca87f7094c3_-_pergola-lede-470-0509-lg.jpg>
<http://www.popularmechanics.com/home/how-to-plans/how-to/a4254/4314667/>