404. That’s an error.

The requested URL /_/+1/confirm?hl=de&url=http%3A%2F%2Fwww.spiegel.de%2Fpolitik%2Fdeutschland%2Fberlins-buergermeister-wowereit-tritt-zurueck-a-988193.html&title=Wowereits%20R%C3%BCcktritt%3A%20Grandiose%20Wurstigkeit%20-%20SPIEGEL%20ONLINE%20-%20Politik was not found on this server. That’s all we know.