What is the combined of Crowd that has an away team which scored 19.15 (129)?
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 SUM("crowd") FROM "round_11" WHERE "away_team_score"='19.15 (129)';