user: Question: Name Tonnage on 27 September 1941 and a Ship of HMSSpringbank?
Columns: ['Date', 'Ship', 'Tonnage', 'Nationality', 'Fate']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['In U-60', 'In U-60', 'In U-60', 'In U-60', 'In U-60']
SQL:

assistant: SELECT "Tonnage" FROM "Table" WHERE "Date" = '27 September 1941' AND "Ship" = 'HMSSpringbank';