Original sentence: A city may extend across county boundaries in some states, but not in others, depending on the state constitution.However, there are some exceptions to this rule:.The city of Dallas, is in parts of five counties, while New York City contains within itself five counties, each of which is coextensive with one of the five boroughs of the city.This has resulted in some of Alaska's cities ranking among the "geographically" largest so-called "cities" in the world
Edited sentence: A city may extend across county boundaries in some states but not in others depending on the state constitution.However, there are exceptions:.The city of Dallas is in parts of five counties while New York City contains within itself five counties, each of which is coextensive with one of the five boroughs of the city.This has resulted in some of Alaska's city-boroughs ranking among the geographically largest cities in the world