<http://schema.org/dateModified>
"2013-09-13T21:53:00-04:00"^^<http://schema.org/Date>
<http://www.upi.com/Science_News/2013/09/13/Astronomers-panning-for-cosmic-gold-find-red-nugget-galaxies/UPI-12791379123580/?spt=hs&or=sn>