<http://schema.org/alternativeHeadline>
"Tickets for Google\u2019s I/O developer conference sold out in less than an hour"^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/google/2013/03/13/tickets-for-googles-io-developer-conference-sold-out-in-less-than-an-hour/>