<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/06/54d0ea10b27b1_-_9701hihij.gif>
<http://www.popularmechanics.com/home/interior-projects/how-to/a167/how-to-install-sump-pump/>