Question:
Who was the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives in Jan, 1977?

Context:
 Kenneth E. Melson is the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives from Jan, 2009 to Jan, 2011. 
 Bradley A. Buckles is the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives from Jan, 1999 to Jan, 2004. 
 Rex D. Davis is the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives from Jan, 1970 to Jan, 1978. 
 B. Todd Jones is the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives from Jan, 2011 to Jan, 2015. 
 John Magaw is the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives from Jan, 1993 to Jan, 1999. 
 Stephen Higgins is the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives from Jan, 1982 to Jan, 1993. 
 Regina Lombardo is the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives from May, 2019 to Dec, 2022. 
 Carl Truscott is the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives from Jan, 2004 to Jan, 2006. 
 Thomas Brandon is the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives from Jan, 2015 to Jan, 2019.

Answer:
Question:
Who was the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives in Jan, 1977?

Context:
 Kenneth E. Melson is the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives from Jan, 2009 to Jan, 2011. 
 Bradley A. Buckles is the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives from Jan, 1999 to Jan, 2004. 
 Rex D. Davis is the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives from Jan, 1970 to Jan, 1978. 
 B. Todd Jones is the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives from Jan, 2011 to Jan, 2015. 
 John Magaw is the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives from Jan, 1993 to Jan, 1999. 
 Stephen Higgins is the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives from Jan, 1982 to Jan, 1993. 
 Regina Lombardo is the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives from May, 2019 to Dec, 2022. 
 Carl Truscott is the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives from Jan, 2004 to Jan, 2006. 
 Thomas Brandon is the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives from Jan, 2015 to Jan, 2019.

Answer:
user
Rex D. Davis
assistant
Question:
Who was the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives in Jan, 1977?

Context:
 Kenneth E. Melson is the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives from Jan, 2009 to Jan, 2011. 
 Bradley A. Buckles is the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives from Jan, 1999 to Jan, 2004. 
 Rex D. Davis is the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives from Jan, 1970 to Jan, 1978. 
 B. Todd Jones is the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives from Jan, 2011 to Jan, 2015. 
 John Magaw is the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives from Jan, 1993 to Jan, 1999. 
 Stephen Higgins is the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives from Jan, 1982 to Jan, 1993. 
 Regina Lombardo is the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives from May, 2019 to Dec, 2022. 
 Carl Truscott is the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives from Jan, 2004 to Jan, 2006. 
 Thomas Brandon is the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives from Jan, 2015 to Jan, 2019.

Answer:
user
Regina Lombardo
Kenneth E. Melson
Stephen Higgins
B. Todd Jones
Carl Truscott
Thomas Brandon
Bradley A. Buckles
John Magaw
assistant
Question:
Who was the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives in Jan, 1977?

Context:
 Kenneth E. Melson is the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives from Jan, 2009 to Jan, 2011. 
 Bradley A. Buckles is the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives from Jan, 1999 to Jan, 2004. 
 Rex D. Davis is the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives from Jan, 1970 to Jan, 1978. 
 B. Todd Jones is the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives from Jan, 2011 to Jan, 2015. 
 John Magaw is the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives from Jan, 1993 to Jan, 1999. 
 Stephen Higgins is the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives from Jan, 1982 to Jan, 1993. 
 Regina Lombardo is the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives from May, 2019 to Dec, 2022. 
 Carl Truscott is the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives from Jan, 2004 to Jan, 2006. 
 Thomas Brandon is the chair of Bureau of Alcohol, Tobacco, Firearms and Explosives from Jan, 2015 to Jan, 2019.

Answer:
user
Rex D. Davis
assistant