Complex sentence: The PSD is a member of the European People's Party (EPP) and the Centrist Democrat International, having belonged to the ELDR and the Liberal International until 1996.
Split into simpler sentences: The PSD is a member of the European People's Party (EPP), having belonged to the ELDR until the late 1990s. The party is also a member of the Centrist Democrat International, having belonged to the Liberal International until 1996.