user: Question: What was the Rebuildjahr(e) for the T2aa class?
Columns: ['Class', 'Railway number(s)', 'Quantity rebuilt', 'Rebuildjahr(e)', 'Type']
Types: ['text', 'text', 'real', 'text', 'text']
Sample row: ['T2aa', '88, 118', 2.0, '1887–1892', '1B n2t']
SQL:

assistant: SELECT "Rebuildjahr(e)" FROM "Table" WHERE "Class" = 'T2aa';