Question:
Who was the chair of Intergovernmental Panel on Climate Change in Sep, 2021?

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

Answer:
Question:
Who was the chair of Intergovernmental Panel on Climate Change in Sep, 2021?

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

Answer:
user
Hoesung Lee
assistant
Question:
Who was the chair of Intergovernmental Panel on Climate Change in Sep, 2021?

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

Answer:
user
Rajendra K. Pachauri
Robert Watson
Ismail El Gizouli
Bert Bolin
assistant
Question:
Who was the chair of Intergovernmental Panel on Climate Change in Sep, 2021?

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

Answer:
user
Hoesung Lee
assistant