<http://schema.org/headline>
"Caroline Wozniacki fires back at Martina Navratilova for No. 1 comments"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.si.com/tennis/beyond-baseline/2012/02/20/caroline-wozniacki-fires-back-at-martina-navratilova-for-no-1-comments>