M odern Istanbul, a sprawling metropolis of more than 10 million inhabitants, is split in two by the narrow, sinuous strait known as the Bosphorus.
Istanbul is on continuous, unseparated city.  
mnli hypothesis: Istanbul is on continuous, unseparated city.   premise: M odern Istanbul, a sprawling metropolis of more than 10 million inhabitants, is split in two by the narrow, sinuous strait known as the Bosphorus.