<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/640x430/54ca90b1e658d_-_barnyard-sheep-4700909-xl.jpg>
<http://www.popularmechanics.com/adventure/outdoors/tips/g247/4331779/>