Article: Portugal maintains a unitary semi-presidential republican form of government and is a developed country with an advanced economy, and a high living standard, having the 18th highest Social Progress in the world, putting it ahead of other Western European countries like France, Spain and Italy. It is a member of numerous international organizations, including the United Nations, the European Union, the Eurozone, OECD, NATO and the Community of Portuguese Language Countries. Portugal is also known for having decriminalized the usage of all common drugs in 2001, the first country in the world to do so. However, drugs are still illegal in Portugal.

Question: What form of government does Portugal maintain?
unitary semi-presidential republican