<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/480x360/54cadb8038944_-_bamboo-bikes-02-1211-lgn.jpg>
<http://www.popularmechanics.com/science/green-tech/g727/how-to-build-a-bamboo-bike/>