<http://schema.org/alternativeHeadline>
"Historious: The bookmarking tool I\u2019ve been waiting for has finally been built. What took so long?"^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/apps/2010/07/15/historious-the-bookmarking-tool-ive-been-waiting-for-has-finally-been-built-what-took-so-long/>