Question:
Who was the chair of Unilever in May, 2005?

Context:
 Antony Burgmans is the chair of Unilever from May, 2005 to May, 2007. 
 Nils Smedegaard Andersen is the chair of Unilever from Nov, 2019 to Dec, 2022. 
 Marijn Dekkers is the chair of Unilever from Apr, 2016 to Nov, 2019. 
 Michael Treschow is the chair of Unilever from May, 2007 to Apr, 2016.

Answer:
Question:
Who was the chair of Unilever in May, 2005?

Context:
 Antony Burgmans is the chair of Unilever from May, 2005 to May, 2007. 
 Nils Smedegaard Andersen is the chair of Unilever from Nov, 2019 to Dec, 2022. 
 Marijn Dekkers is the chair of Unilever from Apr, 2016 to Nov, 2019. 
 Michael Treschow is the chair of Unilever from May, 2007 to Apr, 2016.

Answer:
user
Antony Burgmans
assistant
Question:
Who was the chair of Unilever in May, 2005?

Context:
 Antony Burgmans is the chair of Unilever from May, 2005 to May, 2007. 
 Nils Smedegaard Andersen is the chair of Unilever from Nov, 2019 to Dec, 2022. 
 Marijn Dekkers is the chair of Unilever from Apr, 2016 to Nov, 2019. 
 Michael Treschow is the chair of Unilever from May, 2007 to Apr, 2016.

Answer:
user
Marijn Dekkers
Michael Treschow
Nils Smedegaard Andersen
assistant
Question:
Who was the chair of Unilever in May, 2005?

Context:
 Antony Burgmans is the chair of Unilever from May, 2005 to May, 2007. 
 Nils Smedegaard Andersen is the chair of Unilever from Nov, 2019 to Dec, 2022. 
 Marijn Dekkers is the chair of Unilever from Apr, 2016 to Nov, 2019. 
 Michael Treschow is the chair of Unilever from May, 2007 to Apr, 2016.

Answer:
user
Antony Burgmans
assistant