<http://schema.org/dateModified>
"2013-12-28T11:22:58-05:00"^^<http://schema.org/Date>
<http://www.upi.com/Science_News/2013/12/28/5000-polar-bears-expected-to-be-born-around-New-Years/UPI-15511388247778/?spt=rln&or=1>