<http://schema.org/alternativeHeadline>
"Nest Protect updates bring new Pathlight controls and Steam Check, but no return of Wave feature"^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/gadgets/2014/09/04/nest-protect-updates-bring-new-pathlight-controls-steam-check-return-wave-feature/>