<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/54c8871c3f03b_-_water-diagram-0807.jpg>
<http://www.popularmechanics.com/adventure/tips/a2036/how-to-find-food-in-a-disaster/>