<http://schema.org/headline>
"Taylor Swift, Coldplay, Usher to Play iHeartRadio Music Festival 2014"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.rollingstone.com/music/news/taylor-swift-coldplay-usher-to-play-iheartradio-music-festival-2014-20140723>