Question:
Who was the chair of NatWest Group in Sep, 2009?

Context:
 George Mathewson is the chair of NatWest Group from May, 2001 to Apr, 2006. 
 Tom McKillop is the chair of NatWest Group from Apr, 2006 to Feb, 2009. 
 Sir Howard Davies is the chair of NatWest Group from Sep, 2015 to Dec, 2022. 
 Sir Philip Hampton is the chair of NatWest Group from Feb, 2009 to Sep, 2015.

Answer:
Question:
Who was the chair of NatWest Group in Sep, 2009?

Context:
 George Mathewson is the chair of NatWest Group from May, 2001 to Apr, 2006. 
 Tom McKillop is the chair of NatWest Group from Apr, 2006 to Feb, 2009. 
 Sir Howard Davies is the chair of NatWest Group from Sep, 2015 to Dec, 2022. 
 Sir Philip Hampton is the chair of NatWest Group from Feb, 2009 to Sep, 2015.

Answer:
user
Sir Philip Hampton
assistant
Question:
Who was the chair of NatWest Group in Sep, 2009?

Context:
 George Mathewson is the chair of NatWest Group from May, 2001 to Apr, 2006. 
 Tom McKillop is the chair of NatWest Group from Apr, 2006 to Feb, 2009. 
 Sir Howard Davies is the chair of NatWest Group from Sep, 2015 to Dec, 2022. 
 Sir Philip Hampton is the chair of NatWest Group from Feb, 2009 to Sep, 2015.

Answer:
user
Tom McKillop
George Mathewson
Sir Howard Davies
assistant
Question:
Who was the chair of NatWest Group in Sep, 2009?

Context:
 George Mathewson is the chair of NatWest Group from May, 2001 to Apr, 2006. 
 Tom McKillop is the chair of NatWest Group from Apr, 2006 to Feb, 2009. 
 Sir Howard Davies is the chair of NatWest Group from Sep, 2015 to Dec, 2022. 
 Sir Philip Hampton is the chair of NatWest Group from Feb, 2009 to Sep, 2015.

Answer:
user
Sir Philip Hampton
assistant