<http://schema.org/mainEntityOfPage>
<http://www.upi.com/Top_News/US/2014/02/06/30-children-fall-ill-at-Minnesota-school-no-carbon-monoxide-found/20521391738358/>
<http://www.upi.com/Top_News/US/2014/02/06/30-children-fall-ill-at-Minnesota-school-no-carbon-monoxide-found/UPI-20521391738358/?spt=mps&or=1>