<http://schema.org/dateModified>
"2014-04-22T13:23:58-04:00"^^<http://schema.org/Date>
<http://www.upi.com/Science_News/2014/04/22/NASA-calls-on-Earthlings-to-celebrate-Earth-Day-with-GlobalSelfie/7291398184369/?spt=tsb&or=2>