The three interviews, as you will see, all contain the same set of questions for the purpose of noticing any variations in the way a particular question may be answered by the three subjects, and being able to determine the underlying reason for the variation based on some of the background information provided by each.
Whereas subject 1 and subject 2 both have resided in Brooklyn since their coming to the United States, subject 3 presents a different scenario. Having lived first lived in Albany and then Long Island after moving to the United States, subject 3 is rounding up their first year of mostly residing in Harlem for schooling purposes. It may be interesting to see the impact (or lack thereof) of the different environments on any of the questions answered.
