<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/480x360/54cb2f4ae26e9_-_silent-killers-05-0314-lgn.jpg>
<http://www.popularmechanics.com/science/health/g1473/silent-killers-6-things-that-need-a-little-extra-warning/>