<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/480x360/54cb07f55f2a0_-_complicated-patents-01-0213-de.jpg>
<http://www.popularmechanics.com/technology/g1104/10-patents-that-make-simple-tasks-crazy-complicated/>