<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/06/640x393/54d0ea2f94a42_-_hardwood_floors_09_0307-syn.jpg>
<http://www.popularmechanics.com/home/how-to/a1373/4212794/>