<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/640x320/54ca55ce721a6_-_artifical_retina_03_0111-de.jpg>
<http://www.popularmechanics.com/science/health/a6108/next-gen-digital-sight-could-cure-blindness/?click=pp>