How many weeks are associated with Season 3 – spring 2008?
CREATE TABLE "seasons" (
  "season" text,
  "num_of_stars" real,
  "num_of_weeks" real,
  "season_premiere_date" text,
  "season_finale_date" text,
  "winner" text,
  "runner_up" text,
  "third_place" text
);
SELECT COUNT("num_of_weeks") FROM "seasons" WHERE "season"='3 – spring 2008';