<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/768x516/54ca63bd36a05_-_sander_test_05_1110-xl-10538991.jpg>
<http://www.popularmechanics.com/home/tools/reviews/g148/random-orbital-sander-comparison-test/?click=main_sr>