<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://wdy.h-cdn.co/assets/cm/15/09/160x213/54eb87c7c2ed6_-_bright-bulb-mdn.jpg>
<http://www.womansday.com/home/g296/8-energy-saving-bulbs-to-buy-123382/>