user: Question: What is the tonnage of the Eldena?
Columns: ['Date', 'Name', 'Nationality', 'Tonnage (GRT)', 'Fate']
Types: ['text', 'text', 'text', 'real', 'text']
Sample row: ['2 August 1942', 'Maldonado', 'Uruguay', 5285.0, 'Sunk']
SQL:

assistant: SELECT "Tonnage (GRT)" FROM "Table" WHERE "Name" = 'Eldena';