<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/640x405/54cad17540be4_-_invasive-vs-invasive-03-0911-xln-11158598.jpg>
<http://www.popularmechanics.com/science/animals/g624/exotic-species-vs-invasive-species-importing-one-outsider-to-battle-another/>