Question:
Who was the chair of Regional Council of Lombardy in Sep, 2009?

Context:
 Davide Boni is the chair of Regional Council of Lombardy from May, 2010 to May, 2012. 
 Giulio Achille De Capitani is the chair of Regional Council of Lombardy from Jul, 2008 to May, 2010. 
 Attilio Fontana is the chair of Regional Council of Lombardy from Jun, 2000 to Jul, 2006. 
 Ettore Adalberto Albertoni is the chair of Regional Council of Lombardy from Jul, 2006 to Jul, 2008.

Answer:
Giulio Achille De Capitani