WHAT WAS THE HOME TEAM'S SCORE WHEN THEY HAD A CROWD GREATER THAN 20,000 AND PLAYED AGAINST COLLINGWOOD?
CREATE TABLE "round_7" (
  "home_team" text,
  "home_team_score" text,
  "away_team" text,
  "away_team_score" text,
  "venue" text,
  "crowd" real,
  "date" text
);
SELECT "home_team_score" FROM "round_7" WHERE "crowd">'20,000' AND "away_team"='collingwood';