CREATE TABLE "round_20" (
  "home_team" text,
  "home_team_score" text,
  "away_team" text,
  "away_team_score" text,
  "venue" text,
  "crowd" real,
  "date" text
);

Question: Which Crowd has an Away team score of 17.8 (110)?
SQL: SELECT "crowd" FROM "round_20" WHERE "away_team_score"='17.8 (110)';