What is the largest ethnic group in San Francisco?

W: Are you visiting San Francisco?
M: I’m a native.
W: Really? Everyone else we’ve met so far has been a tourist, like us. I was beginning to think that there were no natives.
M: Well, San Francisco has a lot of different ethnic groups, so you might think you are seeing a lot of tourists.
W: What are the different ethnic groups?
M: Well, let’s see. (1) After whites, the largest one is Asians, then African-Americans.
W: I see.
M: In fact, San Francisco has the largest Chinese community outside of Asia.
W: Do most of the Chinese people live in Chinatown?
M: Well, (2)it’s true that Chinatown is the center of Chinese culture here, but they live all over the city.
W: Do most American cities have so many different ethnic groups?
M: Well, the large ones do—Los Angeles, New York, Chicago. But maybe the different ethnic groups are more visible in San Francisco because the city is so small.
W: Hm... you seem to know a lot about this city.
M: Well, most San Francisco think their city is pretty special. We like to talk about it. Besides, (3)I teach ethnic history at the university here.
W: No wonder you know so much!