<http://schema.org/headline>
"Jay-Z and Justin Timberlake are Headlining the Wireless Festival 2013 in London"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.complex.com/music/2013/02/jay-z-and-justin-timberlake-are-headlining-the-wireless-festival-2013-in-london>