when was the ship launched when it was laid down 20 october 1924 and built by fujinagata shipyards, japan?
CREATE TABLE "list_of_ships" (
  "kanji" text,
  "name" text,
  "builder" text,
  "laid_down" text,
  "launched" text,
  "completed" text
);
SELECT "launched" FROM "list_of_ships" WHERE "builder"='fujinagata shipyards, japan' AND "laid_down"='20 october 1924';