CREATE TABLE "round_3" (
  "home_team" text,
  "home_team_score" text,
  "away_team" text,
  "away_team_score" text,
  "venue" text,
  "crowd" real,
  "date" text
);

Question: When the Away team scored 20.15 (135) on the Date of 23 april 1973, how many people were in the crowd?
SQL: SELECT "crowd" FROM "round_3" WHERE "date"='23 april 1973' AND "away_team_score"='20.15 (135)';

Question: When the Away team was essendon, what was the Venue they played at?
SQL: SELECT "venue" FROM "round_3" WHERE "away_team"='essendon';

Question: When the Away team of essendon played and the Crowd was larger than 18,704 people, which Date did this take place on?
SQL: SELECT "date" FROM "round_3" WHERE "crowd">'18,704' AND "away_team"='essendon';