<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/480x552/54ca66f81d31a_-_finish-nailers-00-0611-xln.jpg>
<http://www.popularmechanics.com/home/tools/reviews/g178/finish-nailer-face-off-we-test-the-top-10/>