<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/54ca85888e4e4_-_windows-weatherstrip-0409-9570347.jpg>
<http://www.popularmechanics.com/home/how-to/a4170/4311712/>