<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/480x360/54cab6d232b5f_-_science_fest_04_1110-lg-3667860.jpg>
<http://www.popularmechanics.com/science/g432/2010-usa-science-and-engineering-festival-pictures/>