What's the rank if the time was 5:54.57 and FB in notes?
CREATE TABLE "semifinal_a_b_2" (
  "rank" real,
  "rowers" text,
  "country" text,
  "time" text,
  "notes" text
);
SELECT "rank" FROM "semifinal_a_b_2" WHERE "notes"='fb' AND "time"='5:54.57';