<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/06/640x430/54d120c6b9c48_-_circular_saws_10_1110-xl-12246895.jpg>
<http://www.popularmechanics.com/home/tools/reviews/g144/11-circular-saw-comparison-test/>