<http://schema.org/mainEntityOfPage>
<http://www.upi.com/Top_News/US/2013/11/17/2-dead-20-injured-in-Colorado-silver-mine-accident/30521384738168/>
<http://www.upi.com/Top_News/US/2013/11/17/2-dead-20-injured-in-Colorado-silver-mine-accident/UPI-30521384738168/>