<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/54cac94b7d531_-_backyard-deck-06-0412-de.jpg>
<http://www.popularmechanics.com/home/outdoor-projects/how-to/a6830/go-high-tech-for-a-better-backyard-deck/>