user: Question: Which Event has the Opponent, Bernard Ackah?
Columns: ['Res.', 'Record', 'Opponent', 'Method', 'Event', 'Round', 'Time', 'Location']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['Loss', '27-11-1 (1)', 'Mamed Khalidov', 'Submission (guillotine choke)', 'KSW 23', 1.0, '2:09', 'Gdansk , Ergo Arena, Poland']
SQL:

assistant: SELECT "Event" FROM "Table" WHERE "Opponent" = 'Bernard Ackah';