<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/980x891/54cae2066a3c3_-_byfr-08-9vbattattach-de.jpg>
<http://www.popularmechanics.com/technology/robots/g779/build-your-own-robot/>