What is the crowd number for the event that has a score of 8.25 (73) for the Away team?
CREATE TABLE "round_19" (
  "home_team" text,
  "home_team_score" text,
  "away_team" text,
  "away_team_score" text,
  "venue" text,
  "crowd" real,
  "date" text
);
SELECT COUNT("crowd") FROM "round_19" WHERE "away_team_score"='8.25 (73)';