Question:
Who was the chair of German Communist Party in Sep, 2011?

Context:
 Bettina Jürgensen is the chair of German Communist Party from Jan, 2010 to Jan, 2013. 
 Heinz Stehr is the chair of German Communist Party from Jan, 1990 to Jan, 2010. 
 Herbert Mies is the chair of German Communist Party from Jan, 1973 to Jan, 1990. 
 Patrik Köbele is the chair of German Communist Party from Jan, 2013 to Dec, 2022.

Answer:
Question:
Who was the chair of German Communist Party in Sep, 2011?

Context:
 Bettina Jürgensen is the chair of German Communist Party from Jan, 2010 to Jan, 2013. 
 Heinz Stehr is the chair of German Communist Party from Jan, 1990 to Jan, 2010. 
 Herbert Mies is the chair of German Communist Party from Jan, 1973 to Jan, 1990. 
 Patrik Köbele is the chair of German Communist Party from Jan, 2013 to Dec, 2022.

Answer:
user
Bettina Jürgensen
assistant
Question:
Who was the chair of German Communist Party in Sep, 2011?

Context:
 Bettina Jürgensen is the chair of German Communist Party from Jan, 2010 to Jan, 2013. 
 Heinz Stehr is the chair of German Communist Party from Jan, 1990 to Jan, 2010. 
 Herbert Mies is the chair of German Communist Party from Jan, 1973 to Jan, 1990. 
 Patrik Köbele is the chair of German Communist Party from Jan, 2013 to Dec, 2022.

Answer:
user
Herbert Mies
Patrik Köbele
Heinz Stehr
assistant
Question:
Who was the chair of German Communist Party in Sep, 2011?

Context:
 Bettina Jürgensen is the chair of German Communist Party from Jan, 2010 to Jan, 2013. 
 Heinz Stehr is the chair of German Communist Party from Jan, 1990 to Jan, 2010. 
 Herbert Mies is the chair of German Communist Party from Jan, 1973 to Jan, 1990. 
 Patrik Köbele is the chair of German Communist Party from Jan, 2013 to Dec, 2022.

Answer:
user
Bettina Jürgensen
assistant