user: Question: On what date was the ship with a Pennant number of Q144 commissioned?
Columns: ['Name', 'Pennant number', 'Ordered', 'Builder', 'Commissioned']
Types: ['text', 'text', 'real', 'text', 'text']
Sample row: ['Redoutable', 'Q136', 1924.0, 'Arsenal de Cherbourg', '24 February 1928']
SQL:

assistant: SELECT "Commissioned" FROM "Table" WHERE "Pennant number" = 'Q144';