What is Date, when Result is Loss, and when Method is Submission (Armbar)?
CREATE TABLE "mixed_martial_arts_record" (
  "result" text,
  "record" text,
  "opponent" text,
  "method" text,
  "date" text,
  "round" real,
  "location" text,
  "notes" text
);
SELECT "date" FROM "mixed_martial_arts_record" WHERE "result"='loss' AND "method"='submission (armbar)';