Where was the match held when the result was win, and tko as the method?
CREATE TABLE "mixed_martial_arts_record" (
  "res" text,
  "record" text,
  "opponent" text,
  "method" text,
  "event" text,
  "round" text,
  "location" text
);
SELECT "location" FROM "mixed_martial_arts_record" WHERE "res"='win' AND "method"='tko';