Question:
Who was the head of Istanbul in Aug, 2006?

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

Answer:
Question:
Who was the head of Istanbul in Aug, 2006?

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

Answer:
user
Kadir Topbaş
assistant
Question:
Who was the head of Istanbul in Aug, 2006?

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

Answer:
user
Ekrem İmamoğlu
Mevlüt Uysal
assistant
Question:
Who was the head of Istanbul in Aug, 2006?

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

Answer:
user
Kadir Topbaş
assistant