Name the lowest Crowd of hisense arena on 8 february?
CREATE TABLE "round_21" (
  "date" text,
  "home_team" text,
  "score" text,
  "away_team" text,
  "venue" text,
  "crowd" real,
  "box_score" text,
  "report" text
);
SELECT MIN("crowd") FROM "round_21" WHERE "venue"='hisense arena' AND "date"='8 february';