<http://schema.org/headline>
"Il y a 50 ans, le \u00ABbip-bip\u00BB de Spoutnik"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.liberation.fr/futurs/2007/10/04/il-y-a-50-ans-le-bip-bip-de-spoutnik_12040>