How many people attended the game when the away team scored 10.11 (71)?
CREATE TABLE "round_8" (
  "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_8" WHERE "away_team_score"='10.11 (71)';