user: Question: What is the quantity when the seats number was 16 and the class was KSS 1913?
Columns: ['Class', 'Quantity', 'Manufacturer', 'Motor', 'Seats']
Types: ['text', 'real', 'text', 'text', 'real']
Sample row: ['BS 1897', 16.0, 'Falkenried', 'UEG', 16.0]
SQL:

assistant: SELECT "Quantity" FROM "Table" WHERE "Seats" = 16.0 AND "Class" = 'KSS 1913';