user: Question: What is the power output for class 5?
Columns: ['Class', 'Introduced', 'Number in class', 'Number in service', 'Power output (kW)']
Types: ['text', 'text', 'real', 'real', 'real']
Sample row: ['DBR', '1980', 10.0, 7.0, 709.0]
SQL:

assistant: SELECT "Power output (kW)" FROM "Table" WHERE "Number in class" = 5.0;