<http://schema.org/headline>
"Happy Birthday, Harpo Marx! (Here&amp;#8217;s 13 minutes of him playing the Harp)"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.elephantjournal.com/2013/11/happy-birthday-harpo-marx-heres-13-minutes-of-him-playing-the-harp/>