Question:
Who was the chair of Intergovernmental Panel on Climate Change in Dec, 2001?

Context:
 Rajendra K. Pachauri is the chair of Intergovernmental Panel on Climate Change from Jan, 2002 to Feb, 2015. 
 Ismail El Gizouli is the chair of Intergovernmental Panel on Climate Change from Feb, 2015 to Oct, 2015. 
 Hoesung Lee is the chair of Intergovernmental Panel on Climate Change from Oct, 2015 to Dec, 2022. 
 Robert Watson is the chair of Intergovernmental Panel on Climate Change from Jan, 1997 to Jan, 2002. 
 Bert Bolin is the chair of Intergovernmental Panel on Climate Change from Jan, 1988 to Jan, 1997.

Answer:
Question:
Who was the chair of Intergovernmental Panel on Climate Change in Dec, 2001?

Context:
 Rajendra K. Pachauri is the chair of Intergovernmental Panel on Climate Change from Jan, 2002 to Feb, 2015. 
 Ismail El Gizouli is the chair of Intergovernmental Panel on Climate Change from Feb, 2015 to Oct, 2015. 
 Hoesung Lee is the chair of Intergovernmental Panel on Climate Change from Oct, 2015 to Dec, 2022. 
 Robert Watson is the chair of Intergovernmental Panel on Climate Change from Jan, 1997 to Jan, 2002. 
 Bert Bolin is the chair of Intergovernmental Panel on Climate Change from Jan, 1988 to Jan, 1997.

Answer:
user
Robert Watson
assistant
Question:
Who was the chair of Intergovernmental Panel on Climate Change in Dec, 2001?

Context:
 Rajendra K. Pachauri is the chair of Intergovernmental Panel on Climate Change from Jan, 2002 to Feb, 2015. 
 Ismail El Gizouli is the chair of Intergovernmental Panel on Climate Change from Feb, 2015 to Oct, 2015. 
 Hoesung Lee is the chair of Intergovernmental Panel on Climate Change from Oct, 2015 to Dec, 2022. 
 Robert Watson is the chair of Intergovernmental Panel on Climate Change from Jan, 1997 to Jan, 2002. 
 Bert Bolin is the chair of Intergovernmental Panel on Climate Change from Jan, 1988 to Jan, 1997.

Answer:
user
Rajendra K. Pachauri
Ismail El Gizouli
Bert Bolin
Hoesung Lee
assistant
Question:
Who was the chair of Intergovernmental Panel on Climate Change in Dec, 2001?

Context:
 Rajendra K. Pachauri is the chair of Intergovernmental Panel on Climate Change from Jan, 2002 to Feb, 2015. 
 Ismail El Gizouli is the chair of Intergovernmental Panel on Climate Change from Feb, 2015 to Oct, 2015. 
 Hoesung Lee is the chair of Intergovernmental Panel on Climate Change from Oct, 2015 to Dec, 2022. 
 Robert Watson is the chair of Intergovernmental Panel on Climate Change from Jan, 1997 to Jan, 2002. 
 Bert Bolin is the chair of Intergovernmental Panel on Climate Change from Jan, 1988 to Jan, 1997.

Answer:
user
Robert Watson
assistant