<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/480x360/54cab3cfb590b_-_science_fest_12_1110-lg-67098831.jpg>
<http://www.popularmechanics.com/science/g432/2010-usa-science-and-engineering-festival-pictures/>