Question:
Who was the head of Istanbul in Nov, 2018?

Context:
 Kadir Topbaş is the head of the government of Istanbul from Apr, 2004 to Sep, 2017. 
 Mevlüt Uysal is the head of the government of Istanbul from Sep, 2017 to Apr, 2019. 
 Ekrem İmamoğlu is the head of the government of Istanbul from Apr, 2019 to Dec, 2022.

Answer:
Question:
Who was the head of Istanbul in Nov, 2018?

Context:
 Kadir Topbaş is the head of the government of Istanbul from Apr, 2004 to Sep, 2017. 
 Mevlüt Uysal is the head of the government of Istanbul from Sep, 2017 to Apr, 2019. 
 Ekrem İmamoğlu is the head of the government of Istanbul from Apr, 2019 to Dec, 2022.

Answer:
user
Mevlüt Uysal
assistant
Question:
Who was the head of Istanbul in Nov, 2018?

Context:
 Kadir Topbaş is the head of the government of Istanbul from Apr, 2004 to Sep, 2017. 
 Mevlüt Uysal is the head of the government of Istanbul from Sep, 2017 to Apr, 2019. 
 Ekrem İmamoğlu is the head of the government of Istanbul from Apr, 2019 to Dec, 2022.

Answer:
user
Ekrem İmamoğlu
Kadir Topbaş
assistant
Question:
Who was the head of Istanbul in Nov, 2018?

Context:
 Kadir Topbaş is the head of the government of Istanbul from Apr, 2004 to Sep, 2017. 
 Mevlüt Uysal is the head of the government of Istanbul from Sep, 2017 to Apr, 2019. 
 Ekrem İmamoğlu is the head of the government of Istanbul from Apr, 2019 to Dec, 2022.

Answer:
user
Mevlüt Uysal
assistant