CREATE TABLE "series_overview" (
  "season" real,
  "episodes" real,
  "season_premiere" text,
  "season_finale" text,
  "dvd_release_date" text
);

Question: On what date was the DVD released for the season with fewer than 13 episodes that aired before season 8?
SQL: SELECT "dvd_release_date" FROM "series_overview" WHERE "season"<8 AND "episodes"<13;

Question: Which season had fewer than 13 episodes and aired its season finale on February 20, 2011?
SQL: SELECT COUNT("season") FROM "series_overview" WHERE "episodes"<13 AND "season_finale"='february 20, 2011';