<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/480x360/54cb0ac0d497a_-_string-trimmer-test-05-0313-de.jpg>
<http://www.popularmechanics.com/home/tools/reviews/g1111/we-test-the-top-string-trimmers/>