What was the Rampage's result in the playoffs in the year that their regular season resulted in 4th, central?
CREATE TABLE "year_by_year" (
  "year" real,
  "division" text,
  "league" text,
  "reg_season" text,
  "playoffs" text,
  "open_cup" text
);
SELECT "playoffs" FROM "year_by_year" WHERE "reg_season"='4th, central';