<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/54ca9129503f8_-_outdoorwoodburningfurnace_lede_470.jpg>
<http://www.popularmechanics.com/home/outdoor-projects/how-to/a6358/4332476/>