What are the ground when the away team scored 6.9 (45)?
CREATE TABLE "round_19" (
  "home_team" text,
  "home_team_score" text,
  "away_team" text,
  "away_team_score" text,
  "ground" text,
  "crowd" real,
  "date" text,
  "report" text
);
SELECT "ground" FROM "round_19" WHERE "away_team_score"='6.9 (45)';