user: Question: What is Class, when Power is 78 watts?
Columns: ['City of license', 'Identifier', 'Frequency', 'Power', 'Class', 'RECNet']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Armstrong', 'CBOL', '1450 AM (moving to 91.3 FM)', '40 s watt', 'LP', 'Query']
SQL:

assistant: SELECT "Class" FROM "Table" WHERE "Power" = '78 watts';