<http://schema.org/alternativeHeadline>
"Rumors of the world ending on Dec. 21 have prompted frightened children and suicidal teens to contact NASA."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/wilderness-resources/stories/2012-mayan-apocalypse-rumors-have-dark-side-nasa-warns>