<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/640x320/54caeb801f3bf_-_fireflies-0712-de.jpg>
<http://www.popularmechanics.com/science/animals/a7726/a-field-guide-for-flickering-fireflies-9077287/>