Sentence:  As is the case for the other Member States participating in <WSD>Schengen</WSD>, Greece issues, on the one hand, Schengen uniform visas, and on the other, national long-stay visas for stays exceeding three months. 
Meaning of the word marked with <WSD> tags:  The (Schengen Agreement): a treaty between countries in continental Europe abolishing mutual border controls and standardizing visa policy.