user: Question: How many vessels are named aqua jewel?
Columns: ['Ship name', 'Year', 'Length', 'Width', 'Passengers', 'Vessels', 'Speed']
Types: ['text', 'real', 'text', 'text', 'real', 'real', 'real']
Sample row: ['Mytilene', 1973.0, '138,3 m', '22,4 m', 1.73, 225.0, 20.0]
SQL:

assistant: SELECT SUM("Vessels") FROM "Table" WHERE "Ship name" = 'aqua jewel';