<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/SearchAction>
<http://www.upi.com/Science_News/2013/10/25/Firefox-extension-to-show-users-whos-tracking-them-on-the-Internet/UPI-64601382738694/?spt=mps&or=2>