I think e I don't think non vengono mai usati da soli, ma vengono sempre seguiti da so, come nell'esempio, o da una proposizione come nel caso di I think/I don't think he went to the concert.
Five of Italy's 20 regions have special status, which allows them to pass their own laws. These are Sicily, Sardinia, and the border regions, Valle d'Aosta, Trentino-Alto Adige and Friuli Venezia Giulia. Recently the Italian government passed further decentralization legislation which applies to the remaining regions too.