CREATE TABLE table_name_15 (result VARCHAR, event VARCHAR, method VARCHAR)

Which Result has the Event Strikeforce and the Method, Ko (spinning back fist)?
SELECT result FROM table_name_15 WHERE event = "strikeforce" AND method = "ko (spinning back fist)"
SELECT "result" FROM "table_name_15" WHERE "event" = "strikeforce" AND "ko (spinning back fist)" = "method"