<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/06/480x360/54cfd67487210_-_pterosaurs-05-0414-lgn.jpg>
<http://www.popularmechanics.com/science/animals/g1804/5-things-you-should-know-about-pterosaurs/>