response: As of 2017, it was 305,704 people within the city limits.
history: I was born in Pittsburgh. Oh cool!  I gather it's an American city in Pennsylvania. I have not been there since I was 2 years old. I don't remember anything about it. Well one thing is that it is currently the 63rd largest city in the US! How many people live there?
knowledge: As of 2017, a total population of 305,704 lives within the city limits, making it the 63rd-largest city in the U.S.