Question:
Who was the chair of Estonian Reform Party in Aug, 2017?

Context:
 Kaja Kallas is the chair of Estonian Reform Party from Apr, 2018 to Dec, 2022. 
 Hanno Pevkur is the chair of Estonian Reform Party from Jan, 2017 to Apr, 2018. 
 Taavi Rõivas is the chair of Estonian Reform Party from Apr, 2014 to Jan, 2017. 
 Siim Kallas is the chair of Estonian Reform Party from Jan, 1994 to Jan, 2004.

Answer:
Question:
Who was the chair of Estonian Reform Party in Aug, 2017?

Context:
 Kaja Kallas is the chair of Estonian Reform Party from Apr, 2018 to Dec, 2022. 
 Hanno Pevkur is the chair of Estonian Reform Party from Jan, 2017 to Apr, 2018. 
 Taavi Rõivas is the chair of Estonian Reform Party from Apr, 2014 to Jan, 2017. 
 Siim Kallas is the chair of Estonian Reform Party from Jan, 1994 to Jan, 2004.

Answer:
user
Hanno Pevkur
assistant
Question:
Who was the chair of Estonian Reform Party in Aug, 2017?

Context:
 Kaja Kallas is the chair of Estonian Reform Party from Apr, 2018 to Dec, 2022. 
 Hanno Pevkur is the chair of Estonian Reform Party from Jan, 2017 to Apr, 2018. 
 Taavi Rõivas is the chair of Estonian Reform Party from Apr, 2014 to Jan, 2017. 
 Siim Kallas is the chair of Estonian Reform Party from Jan, 1994 to Jan, 2004.

Answer:
user
Siim Kallas
Taavi Rõivas
Kaja Kallas
assistant
Question:
Who was the chair of Estonian Reform Party in Aug, 2017?

Context:
 Kaja Kallas is the chair of Estonian Reform Party from Apr, 2018 to Dec, 2022. 
 Hanno Pevkur is the chair of Estonian Reform Party from Jan, 2017 to Apr, 2018. 
 Taavi Rõivas is the chair of Estonian Reform Party from Apr, 2014 to Jan, 2017. 
 Siim Kallas is the chair of Estonian Reform Party from Jan, 1994 to Jan, 2004.

Answer:
user
Hanno Pevkur
assistant