<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/54ca9788b9706_-_vaccinesandautismneedle_500x375_0210-lg.jpg>
<http://www.popularmechanics.com/science/health/a4998/4345610/>