Question:
Who was the head of Skanderborg Municipality in Dec, 2009?

Context:
 Jørgen Gaarde is the head of the government of Skanderborg Municipality from Jan, 2010 to Mar, 2019. 
 Jens Grønlund is the head of the government of Skanderborg Municipality from Jan, 2007 to Dec, 2009. 
 Frands Fischer is the head of the government of Skanderborg Municipality from Apr, 2019 to Dec, 2022.

Answer:
Jens Grønlund