Ella Taliercio moved into her Park Slope two-bedroom in 1958, raised three kids there (burying two of them in Green-Wood Cemetery), and still works in the neighborhood. But now she and her husband have got to go because the fancy Berkeley Carroll School, which owns her building, wants to turn it into classrooms. The apartment is rent-stabilized—Taliercio paid $33 a month in '58 and $147.08 today—but Berkeley Carroll has non-profit status, enabling the school to......