<http://schema.org/alternativeHeadline>
"According to comScore, users are spending just 3 minutes per month on Google+"^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/socialmedia/2012/02/28/according-to-comscore-users-are-spending-just-3-minutes-per-month-on-google/>