<http://schema.org/headline>
"Julian Castro, mayor of San Antonio, Texas, to be keynote speaker at Democratic National Convention - @TexasTribune"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.breakingnews.com/item/2012/07/31/juliancastrotx-will-be-the-keynote-speaker-at-the-democratic-nationa/>