<http://schema.org/headline>
"Pharrell to be a mentor on Rihanna's 'Styled to Rock' show"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.upi.com/Entertainment_News/TV/2013/05/16/Pharrell-to-be-a-mentor-on-Rihannas-Styled-to-Rock-show/UPI-93141368712144/>