Question:
Who was the chair of German Communist Party in Apr, 1996?

Context:
 Bettina Jürgensen is the chair of German Communist Party from Jan, 2010 to Jan, 2013. 
 Herbert Mies is the chair of German Communist Party from Jan, 1973 to Jan, 1990. 
 Heinz Stehr is the chair of German Communist Party from Jan, 1990 to Jan, 2010. 
 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 Apr, 1996?

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

Answer:
user
Heinz Stehr
assistant
Question:
Who was the chair of German Communist Party in Apr, 1996?

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

Answer:
user
Herbert Mies
Bettina Jürgensen
Patrik Köbele
assistant
Question:
Who was the chair of German Communist Party in Apr, 1996?

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

Answer:
user
Heinz Stehr
assistant