<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/06/54d0e8d958efa_-_pmx0305screendoor13.jpg>
<http://www.popularmechanics.com/home/outdoor-projects/how-to/a260/screen-door-repair/?click=main_sr>