<http://schema.org/dateModified>
"2013-07-19T16:42:57-04:00"^^<http://schema.org/Date>
<http://www.upi.com/Top_News/World-News/2013/07/19/Home-secretary-International-relations-factor-in-Litvinenko-probe/UPI-84491374266577/?spt=hs&or=tn>