<http://schema.org/dateModified>
"2013-12-19T12:11:29-05:00"^^<http://schema.org/Date>
<http://www.upi.com/Science_News/Blog/2013/12/19/NASAs-Dawn-spacecraft-captures-colorful-pictures-of-asteroids/8621387473089/?st_rec=5961387489099>