user: Question: WhAt city hAs the A ClAss licence?
Columns: ['Call sign', 'Frequency', 'City of license', 'Facility ID', 'ERP / Power W', 'Height m ( ft )', 'Class', 'FCC info']
Types: ['text', 'text', 'text', 'real', 'real', 'text', 'text', 'text']
Sample row: ['WAUA', '89.5 FM', 'Petersburg', 71659.0, 10000.0, 'm (ft)', 'B', 'FCC']
SQL:

assistant: SELECT "City of license" FROM "Table" WHERE "Class" = 'A';