Question:
Who was the head of Kazakhstan in Dec, 2018?

Context:
 Alihan Smaiylov is the head of the government of Kazakhstan from Jan, 2022 to Dec, 2022. 
 Askar Mamin is the head of the government of Kazakhstan from Feb, 2019 to Jan, 2022. 
 Bakhytzhan Sagintayev is the head of the government of Kazakhstan from Sep, 2016 to Feb, 2019. 
 Karim Massimov is the head of the government of Kazakhstan from Apr, 2014 to Sep, 2016.

Answer:
Question:
Who was the head of Kazakhstan in Dec, 2018?

Context:
 Alihan Smaiylov is the head of the government of Kazakhstan from Jan, 2022 to Dec, 2022. 
 Askar Mamin is the head of the government of Kazakhstan from Feb, 2019 to Jan, 2022. 
 Bakhytzhan Sagintayev is the head of the government of Kazakhstan from Sep, 2016 to Feb, 2019. 
 Karim Massimov is the head of the government of Kazakhstan from Apr, 2014 to Sep, 2016.

Answer:
user
Bakhytzhan Sagintayev
assistant
Question:
Who was the head of Kazakhstan in Dec, 2018?

Context:
 Alihan Smaiylov is the head of the government of Kazakhstan from Jan, 2022 to Dec, 2022. 
 Askar Mamin is the head of the government of Kazakhstan from Feb, 2019 to Jan, 2022. 
 Bakhytzhan Sagintayev is the head of the government of Kazakhstan from Sep, 2016 to Feb, 2019. 
 Karim Massimov is the head of the government of Kazakhstan from Apr, 2014 to Sep, 2016.

Answer:
user
Askar Mamin
Karim Massimov
Alihan Smaiylov
assistant
Question:
Who was the head of Kazakhstan in Dec, 2018?

Context:
 Alihan Smaiylov is the head of the government of Kazakhstan from Jan, 2022 to Dec, 2022. 
 Askar Mamin is the head of the government of Kazakhstan from Feb, 2019 to Jan, 2022. 
 Bakhytzhan Sagintayev is the head of the government of Kazakhstan from Sep, 2016 to Feb, 2019. 
 Karim Massimov is the head of the government of Kazakhstan from Apr, 2014 to Sep, 2016.

Answer:
user
Bakhytzhan Sagintayev
assistant