CREATE TABLE "round_17" (
  "home_team" text,
  "home_team_score" text,
  "away_team" text,
  "away_team_score" text,
  "venue" text,
  "crowd" real,
  "date" text
);

Question: What was Essendon's opponents away score?
SQL: SELECT "away_team_score" FROM "round_17" WHERE "home_team"='essendon';

Question: What was the attendance at Corio Oval?
SQL: SELECT "crowd" FROM "round_17" WHERE "venue"='corio oval';