Who was the home team for the Essendon away team with attendance over 13,500?
CREATE TABLE "round_4" (
  "home_team" text,
  "home_team_score" text,
  "away_team" text,
  "away_team_score" text,
  "venue" text,
  "crowd" real,
  "date" text
);
SELECT "home_team_score" FROM "round_4" WHERE "crowd">'13,500' AND "away_team"='essendon';