<http://schema.org/alternativeHeadline>
"Mozilla plans to launch Firefox Metro for Windows 8 on December 10"^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/insider/2013/08/17/mozilla-plans-to-launch-its-first-firefox-metro-release-for-windows-8-on-december-10/>