<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/54cae792d8287_-_plasma-bacteria-0412-mdn.jpg>
<http://www.popularmechanics.com/science/health/a7579/plasma-flashlight-destroys-bacteria-7865901/>