<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/768x516/54cae26436a6a_-_spider-silk-05-0112-xln.jpg>
<http://www.popularmechanics.com/science/health/g741/6-spider-silk-superpowers/>