On what date did the away team have a score of 9.10 (64)
CREATE TABLE "round_20" (
  "home_team" text,
  "home_team_score" text,
  "away_team" text,
  "away_team_score" text,
  "venue" text,
  "crowd" real,
  "date" text
);
SELECT "date" FROM "round_20" WHERE "away_team_score"='9.10 (64)';