<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/06/54d0ea1dad557_-_tb_9607hihiau.gif>
<http://www.popularmechanics.com/home/interior-projects/how-to/a168/suspended-ceiling-tiles-install/>