Question:
Who was the head of Hasnon in Sep, 2008?

Context:
 Désiré Grudenaire is the head of the government of Hasnon from Sep, 1941 to Oct, 1944. 
 Louis Louis is the head of the government of Hasnon from May, 1925 to May, 1935. 
 Jean-Marie Ballé is the head of the government of Hasnon from Mar, 1971 to Mar, 1977. 
 André Desmedt is the head of the government of Hasnon from May, 2020 to Dec, 2022. 
 Adolphe Fauverque is the head of the government of Hasnon from Dec, 1921 to May, 1925. 
 Yannick Nison is the head of the government of Hasnon from Jul, 1991 to May, 2020. 
 Jean Delœil is the head of the government of Hasnon from Mar, 1977 to Jul, 1991. 
 Edmond Desprez is the head of the government of Hasnon from Oct, 1944 to Mar, 1959. 
 Clément Larivière is the head of the government of Hasnon from Dec, 1919 to Dec, 1921.

Answer:
Yannick Nison