Question:
Who was the chair of BT Group in Jun, 2020?

Context:
 Sir Christopher Bland is the chair of BT Group from Jan, 2001 to Jan, 2007. 
 Sir Michael Rake is the chair of BT Group from Jan, 2007 to Nov, 2017. 
 Jan du Plessis is the chair of BT Group from Nov, 2017 to Dec, 2022.

Answer:
Question:
Who was the chair of BT Group in Jun, 2020?

Context:
 Sir Christopher Bland is the chair of BT Group from Jan, 2001 to Jan, 2007. 
 Sir Michael Rake is the chair of BT Group from Jan, 2007 to Nov, 2017. 
 Jan du Plessis is the chair of BT Group from Nov, 2017 to Dec, 2022.

Answer:
user
Jan du Plessis
assistant
Question:
Who was the chair of BT Group in Jun, 2020?

Context:
 Sir Christopher Bland is the chair of BT Group from Jan, 2001 to Jan, 2007. 
 Sir Michael Rake is the chair of BT Group from Jan, 2007 to Nov, 2017. 
 Jan du Plessis is the chair of BT Group from Nov, 2017 to Dec, 2022.

Answer:
user
Sir Michael Rake
Sir Christopher Bland
assistant
Question:
Who was the chair of BT Group in Jun, 2020?

Context:
 Sir Christopher Bland is the chair of BT Group from Jan, 2001 to Jan, 2007. 
 Sir Michael Rake is the chair of BT Group from Jan, 2007 to Nov, 2017. 
 Jan du Plessis is the chair of BT Group from Nov, 2017 to Dec, 2022.

Answer:
user
Jan du Plessis
assistant