CREATE TABLE "mixed_martial_arts_record" (
  "res" text,
  "record" text,
  "opponent" text,
  "method" text,
  "event" text,
  "round" real,
  "time" text,
  "location" text
);

Question: Which event is in round 1 with a record at 5-1?
SQL: SELECT "event" FROM "mixed_martial_arts_record" WHERE "round"=1 AND "record"='5-1';