<http://schema.org/dateModified>
"2013-04-09T09:22:42-04:00"^^<http://schema.org/Date>
<http://www.upi.com/Top_News/US/2013/04/09/Stephen-Colbert-sets-up-Bill-Clinton-Twitter-account-president-sends-first-tweet/UPI-98611365513762/?rel=77981366917550>