Question:
Who was the head of Belgium in Dec, 2021?

Context:
 Charles Michel is the head of the government of Belgium from Oct, 2014 to Oct, 2019. 
 Sophie Wilmès is the head of the government of Belgium from Oct, 2019 to Oct, 2020. 
 Alexander De Croo is the head of the government of Belgium from Oct, 2020 to Dec, 2022.

Answer:
Alexander De Croo