<http://schema.org/dateModified>
"2013-03-18T12:57:22-04:00"^^<http://schema.org/Date>
<http://www.upi.com/Top_News/US/2013/03/18/Obama-taps-Thomas-Perez-to-be-Labor-chief/UPI-14601363609924/?spt=hts&or=4>