What is the opponent after round number 1 with a method of decision (unanimous)?
CREATE TABLE "mixed_martial_arts_record" (
  "res" text,
  "record" text,
  "opponent" text,
  "method" text,
  "event" text,
  "round" real,
  "location" text
);
SELECT "opponent" FROM "mixed_martial_arts_record" WHERE "round">1 AND "method"='decision (unanimous)';