<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/768x516/54cad174e11e1_-_invasive-vs-invasive-02-0911-xln.jpg>
<http://www.popularmechanics.com/science/animals/g624/exotic-species-vs-invasive-species-importing-one-outsider-to-battle-another/>