<http://schema.org/alternativeHeadline>
"Internet users are urging Wikipedia to \u2018go black\u2019 in protest of SOPA / PIPA"^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/insider/2012/01/13/internet-users-are-urging-wikipedia-to-go-black-in-protest-of-sopa-pipa/>