What event had a win, record of 8-1 and n/a round?
CREATE TABLE "mixed_martial_arts_record" (
  "res" text,
  "record" text,
  "opponent" text,
  "method" text,
  "event" text,
  "round" text
);
SELECT "event" FROM "mixed_martial_arts_record" WHERE "res"='win' AND "round"='n/a' AND "record"='8-1';