Question: The city where Turkish Statistical Institute has its headquarters in has a population of what in the urban center?
Sentence (from "Turkish Statistical Institute"): Turkish Statistical Institute (commonly known as TurkStat; Turkish: "Türkiye İstatistik Kurumu" or TÜİK) is the Turkish government agency commissioned with producing official statistics on Turkey, its population, resources, economy, society, and culture.
Relevant evidence: No