Question:
Who was the head of state of Ethiopia in Dec, 2017?

Context:
 Sahle-Work Zewde is the head of the state of Ethiopia from Oct, 2018 to Dec, 2022. 
 Mulatu Teshome is the head of the state of Ethiopia from Oct, 2013 to Oct, 2018. 
 Girma Wolde-Giorgis is the head of the state of Ethiopia from Oct, 2001 to Oct, 2013.

Answer:
Question:
Who was the head of state of Ethiopia in Dec, 2017?

Context:
 Sahle-Work Zewde is the head of the state of Ethiopia from Oct, 2018 to Dec, 2022. 
 Mulatu Teshome is the head of the state of Ethiopia from Oct, 2013 to Oct, 2018. 
 Girma Wolde-Giorgis is the head of the state of Ethiopia from Oct, 2001 to Oct, 2013.

Answer:
user
Mulatu Teshome
assistant
Question:
Who was the head of state of Ethiopia in Dec, 2017?

Context:
 Sahle-Work Zewde is the head of the state of Ethiopia from Oct, 2018 to Dec, 2022. 
 Mulatu Teshome is the head of the state of Ethiopia from Oct, 2013 to Oct, 2018. 
 Girma Wolde-Giorgis is the head of the state of Ethiopia from Oct, 2001 to Oct, 2013.

Answer:
user
Girma Wolde-Giorgis
Sahle-Work Zewde
assistant
Question:
Who was the head of state of Ethiopia in Dec, 2017?

Context:
 Sahle-Work Zewde is the head of the state of Ethiopia from Oct, 2018 to Dec, 2022. 
 Mulatu Teshome is the head of the state of Ethiopia from Oct, 2013 to Oct, 2018. 
 Girma Wolde-Giorgis is the head of the state of Ethiopia from Oct, 2001 to Oct, 2013.

Answer:
user
Mulatu Teshome
assistant