Read this: The Republic of the Congo received full independence from France on August 15, 1960. Fulbert Youlou ruled as the country's first president until labour elements and rival political parties instigated a three-day uprising that ousted him. The Congolese military took charge of the country briefly and installed a civilian provisional government headed by Alphonse Massamba-Débat.

Who replaced Youlou?
What is the answer? (If it cannot be answered, return "unanswerable")
Alphonse Massamba-Débat