<http://schema.org/alternativeHeadline>
"Facebook wants Page administrators to promote their posts, and this demo video shows them how"^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/socialmedia/2012/05/30/facebook-wants-page-administrators-to-promote-their-posts-and-this-demo-video-shows-them-how/>