Question:
Who was the chair of Leibniz Association in Feb, 1999?

Context:
 Martina Brockmeier is the chair of Leibniz Association from Jul, 2022 to Dec, 2022. 
 Karl Ulrich Mayer is the chair of Leibniz Association from Jul, 2010 to Jun, 2014. 
 Ernst Theodor Rietschel is the chair of Leibniz Association from Jan, 2005 to Jan, 2010. 
 Ingolf Volker Hertel is the chair of Leibniz Association from Jan, 1995 to Jan, 1998. 
 Matthias Kleiner is the chair of Leibniz Association from Jul, 2014 to Jun, 2022. 
 Frank Pobell is the chair of Leibniz Association from Jan, 1998 to Jan, 2001. 
 Hans-Olaf Henkel is the chair of Leibniz Association from Jan, 2001 to Jan, 2005.

Answer:
Question:
Who was the chair of Leibniz Association in Feb, 1999?

Context:
 Martina Brockmeier is the chair of Leibniz Association from Jul, 2022 to Dec, 2022. 
 Karl Ulrich Mayer is the chair of Leibniz Association from Jul, 2010 to Jun, 2014. 
 Ernst Theodor Rietschel is the chair of Leibniz Association from Jan, 2005 to Jan, 2010. 
 Ingolf Volker Hertel is the chair of Leibniz Association from Jan, 1995 to Jan, 1998. 
 Matthias Kleiner is the chair of Leibniz Association from Jul, 2014 to Jun, 2022. 
 Frank Pobell is the chair of Leibniz Association from Jan, 1998 to Jan, 2001. 
 Hans-Olaf Henkel is the chair of Leibniz Association from Jan, 2001 to Jan, 2005.

Answer:
user
Frank Pobell
assistant
Question:
Who was the chair of Leibniz Association in Feb, 1999?

Context:
 Martina Brockmeier is the chair of Leibniz Association from Jul, 2022 to Dec, 2022. 
 Karl Ulrich Mayer is the chair of Leibniz Association from Jul, 2010 to Jun, 2014. 
 Ernst Theodor Rietschel is the chair of Leibniz Association from Jan, 2005 to Jan, 2010. 
 Ingolf Volker Hertel is the chair of Leibniz Association from Jan, 1995 to Jan, 1998. 
 Matthias Kleiner is the chair of Leibniz Association from Jul, 2014 to Jun, 2022. 
 Frank Pobell is the chair of Leibniz Association from Jan, 1998 to Jan, 2001. 
 Hans-Olaf Henkel is the chair of Leibniz Association from Jan, 2001 to Jan, 2005.

Answer:
user
Hans-Olaf Henkel
Karl Ulrich Mayer
Martina Brockmeier
Ernst Theodor Rietschel
Ingolf Volker Hertel
Matthias Kleiner
assistant
Question:
Who was the chair of Leibniz Association in Feb, 1999?

Context:
 Martina Brockmeier is the chair of Leibniz Association from Jul, 2022 to Dec, 2022. 
 Karl Ulrich Mayer is the chair of Leibniz Association from Jul, 2010 to Jun, 2014. 
 Ernst Theodor Rietschel is the chair of Leibniz Association from Jan, 2005 to Jan, 2010. 
 Ingolf Volker Hertel is the chair of Leibniz Association from Jan, 1995 to Jan, 1998. 
 Matthias Kleiner is the chair of Leibniz Association from Jul, 2014 to Jun, 2022. 
 Frank Pobell is the chair of Leibniz Association from Jan, 1998 to Jan, 2001. 
 Hans-Olaf Henkel is the chair of Leibniz Association from Jan, 2001 to Jan, 2005.

Answer:
user
Frank Pobell
assistant