<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/640x443/54cae7923c4de_-_plasma-bacteria-02-0412-vpsdx9-de.jpg>
<http://www.popularmechanics.com/science/health/a7579/plasma-flashlight-destroys-bacteria-7865901/>