<http://schema.org/mainEntityOfPage>
<http://www.upi.com/Top_News/US/2010/01/10/Harkin-seeks-change-to-filibuster-rules/27061263126155/>
<http://www.upi.com/Top_News/US/2010/01/10/Harkin-seeks-change-to-filibuster-rules/UPI-27061263126155/>