<http://schema.org/headline>
"Whenever you hit Facebook\u2019s \u201CLike\u201D button you\u2019re signing up for a subscription."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/facebook/2011/02/25/what-you-may-not-like-about-facebooks-infamous-feature/facebook_like_button-2/>