Semi-presidentialism requires a popularly elected president plus a premier answerable to parliament

Evidence

The concept of a semi-presidential form of government, as used here, is defined only by the content of the constitution. A political regime is considered as semi-presidential if the constitution which established it, combines three elements: (1) the president of the republic is elected by universal suffrage, (2) he possesses quite considerable powers; (3) he has opposite him, however, a prime minister and ministers who possess executive and governmental power and can stay in office only if the parliament does not show its opposition to them. — Gary Goertz, Social Science Concepts and Measurement, 300

Categorization

• XREF: Connects to comparative-politics typologies of regime type (parliamentary, presidential) and to Duverger’s original 1980 formulation.