CREATE TABLE table_52764 ("Res." TEXT, "Record" TEXT, "Opponent" TEXT, "Method" TEXT, "Event" TEXT, "Round" FLOAT, "Time" TEXT, "Location" TEXT)

Which Event has the Opponent, Bernard Ackah?
SELECT "Event" FROM table_52764 WHERE "Opponent" = 'bernard ackah'
SELECT "Event" FROM "table_52764" WHERE "Opponent" = 'bernard ackah'