Question:
Who was the chair of United States Department of Justice in Oct, 2016?

Context:
 William Barr is the chair of United States Department of Justice from Feb, 2019 to Dec, 2022. 
 Loretta Lynch is the chair of United States Department of Justice from Apr, 2015 to Jan, 2017. 
 Eric Holder is the chair of United States Department of Justice from Jan, 2009 to Apr, 2015. 
 Jeff Sessions is the chair of United States Department of Justice from Feb, 2017 to Nov, 2018.

Answer:
Question:
Who was the chair of United States Department of Justice in Oct, 2016?

Context:
 William Barr is the chair of United States Department of Justice from Feb, 2019 to Dec, 2022. 
 Loretta Lynch is the chair of United States Department of Justice from Apr, 2015 to Jan, 2017. 
 Eric Holder is the chair of United States Department of Justice from Jan, 2009 to Apr, 2015. 
 Jeff Sessions is the chair of United States Department of Justice from Feb, 2017 to Nov, 2018.

Answer:
user
Loretta Lynch
assistant
Question:
Who was the chair of United States Department of Justice in Oct, 2016?

Context:
 William Barr is the chair of United States Department of Justice from Feb, 2019 to Dec, 2022. 
 Loretta Lynch is the chair of United States Department of Justice from Apr, 2015 to Jan, 2017. 
 Eric Holder is the chair of United States Department of Justice from Jan, 2009 to Apr, 2015. 
 Jeff Sessions is the chair of United States Department of Justice from Feb, 2017 to Nov, 2018.

Answer:
user
William Barr
Jeff Sessions
Eric Holder
assistant
Question:
Who was the chair of United States Department of Justice in Oct, 2016?

Context:
 William Barr is the chair of United States Department of Justice from Feb, 2019 to Dec, 2022. 
 Loretta Lynch is the chair of United States Department of Justice from Apr, 2015 to Jan, 2017. 
 Eric Holder is the chair of United States Department of Justice from Jan, 2009 to Apr, 2015. 
 Jeff Sessions is the chair of United States Department of Justice from Feb, 2017 to Nov, 2018.

Answer:
user
Loretta Lynch
assistant