<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/320x426/54cb110c522ba_-_7-knives-03-0513-de.jpg>
<http://www.popularmechanics.com/adventure/outdoors/g1169/the-7-knives-you-should-own/>