user: Question: How much tonnage was Damaged?
Columns: ['Date', 'Name', 'Nationality', 'Tonnage (GRT)', 'Fate']
Types: ['text', 'text', 'text', 'real', 'text']
Sample row: ['17 March 1943', 'Alderamin', 'Netherlands', 7886.0, 'Sunk']
SQL:

assistant: SELECT SUM("Tonnage (GRT)") FROM "Table" WHERE "Fate" = 'Damaged';