user: Question: What is the railway number of T 4 II class?
Columns: ['Class', 'Railway number(s)', 'Quantity', 'Year(s) of manufacture', 'Axle arrangement ( UIC )']
Types: ['text', 'text', 'real', 'text', 'text']
Sample row: ['None', '70–73 ( de )', 4.0, '1868', 'B n2t']
SQL:

assistant: SELECT "Railway number(s)" FROM "Table" WHERE "Class" = 'T 4 II';