<http://schema.org/headline>
"Boko Haram Just Declared A 'Caliphate' In Nigeria, The Second One This Summer"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.huffingtonpost.co.uk/2014/08/24/boko-haram-caliphate-nige_n_5704653.html>