<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/320x240/54cb0bee1f7dc_-_giant-umbrellas-05-0413-lgn.jpg>
<http://www.popularmechanics.com/technology/gadgets/reviews/g1109/get-yourself-a-serious-umbrella/>