What Event used submission (rear naked choke) with 9-4?
CREATE TABLE "mixed_martial_arts_record" (
  "res" text,
  "record" text,
  "opponent" text,
  "method" text,
  "event" text,
  "round" real,
  "location" text
);
SELECT "event" FROM "mixed_martial_arts_record" WHERE "method"='submission (rear naked choke)' AND "record"='9-4';