user: Question: What tonnage was built in 2007?
Columns: ['Built', 'Ship', 'Operator', 'Tonnage', 'Flag']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [2006.0, 'Costa Concordia', 'Costa Cruises', 'GT', 'Italy']
SQL:

assistant: SELECT "Tonnage" FROM "Table" WHERE "Built" = 2007.0;