<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/06/640x393/54d0ea2f6280c_-_hardwood_floors_08_0307-syn.jpg>
<http://www.popularmechanics.com/home/how-to/a1373/4212794/>