<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/06/54d0e97f675c6_-_timber-frame-b-0407.jpg>
<http://www.popularmechanics.com/home/outdoor-projects/how-to/a1506/4213580/>