On which date was the game where the home teams score was 22.15 (147), and the away teams score was 9.8 (62)
CREATE TABLE "round_11" (
  "home_team" text,
  "home_team_score" text,
  "away_team" text,
  "away_team_score" text,
  "venue" text,
  "crowd" real,
  "date" text
);
SELECT "date" FROM "round_11" WHERE "home_team_score"='22.15 (147)' AND "away_team_score"='9.8 (62)';